iOS

How To Handle Row Selection in UITableView


If you’ve followed the iOS programming tutorials, I believe you should manage to create a simple Table View app with custom table cell. So far we focus on displaying data in the table view. But how do we know when someone taps on the table row? This is what we’ll cover in this post and show you how to handle row selection.

First, let’s revisit our app and see what we’ll add to it.

Simple Table App - Row Selection

There are a couple of changes we’ll try it out in this tutorial:

  • Display an alert message when user taps a row
  • Display a check mark when user selects a row

Understanding UITableViewDelegate

When you first built the Simple Table View app, you’ve declared two delegates (UITableViewDelegate, UITableViewDataSource) in the SimpleTableController.h:

As explained in the earlier tutorial, both delegates are known as protocol in Objective-C. You have to conform with the requirements defined in these protocols in order to build a UITableView.

It’s very common to come across various delegates in iOS programming. Each delegate is responsible for a specific role or task to keep the system simple and clean. Whenever an object needs to perform certain task, it depends on another object to handle it. This is usually known as separation of concern in system design.

When you look at the UITableView class, it also applies this design concept. The two delegates are catered for different purpose. The UITableViewDataSource delegate, that we’ve implemented, defines methods that are used for displaying table data. On the other hand, the UITableViewDelegate deals with the appearance of the UITableView, as well as, handles the row selection.

It’s obvious we’ll make use of the UITableViewDelegate and implement the required method for handling row selection.

Handling Table Row Selection

Before we change the code, you may wonder:

How do we know which methods in UITableViewDelegate need to implement?

You can always refer to the Apple’s iOS programming reference. There are two ways to access the documentation. You can access the API document on Apple’s website. Or simply look it up inside Xcode. For example, you can bring up the API document of UITableViewDelegate, just place the cursor over the class name and press “control-command-?”. You’ll see the following popup:

xcode api doc shortcut

Shortcut to Access API Doc

Click the UITableViewDelegate Protocol Reference to display the API document:

UITableViewDelegate Protocol Reference

UITableViewDelegate Protocol Reference

If you’ve read through the document, you’ll find these methods that are used for managing row selection:

– tableView:willSelectRowAtIndexPath:
– tableView:didSelectRowAtIndexPath:

Both of the methods are used for row selection. The only difference is that “willSelectRowAtIndexPath” is called when a specified row is about to be selected. Usually you make use of this method to prevent selection of a particular cell from taking place. Typically, you use “didSelectRowAtIndexPath” method, which is invoked after user selects a row, to handle the row selection and this is where you add code to specify the action when the row is selected. In this tutorial, we’ll add a couple of actions to handle row selection:

  • Display an alert message
  • Display a check mark to indicate the row is selected

Let’s Code

Okay, that’s enough for the explanation. Let’s move onto the interesting part – code, code, code!

In Xcode, open the “SimpleTableViewController.m” and add the following method before “@end”.

The code is very easy to understand. When a row is selected, the app creates an UIAlertView and shows an alert message. Try to run the app and this is what the app looks like when you tap a row:

SimpleTableApp Row Selected

When a row is selected, an alert message is displayed

Your Exercise

For now, we just display a generic message when a row is selected. It’s always better to display an informational message like below:

SimpleTableApp Row Selected Recipe

Think about how you can alter the code (hint: the indexPath parameter contains the row number of the selected row) and display the message like the screenshot shown above. It’s not difficult to do so if you’ve followed the previous tutorial.

Easy, right? With the use of delegate, it’s very straightforward to detect row selection. Next, we’ll add a few lines of code to display a tick for the selected item. Before that, let me take a look at the default content of a table cell:

UITableViewCell Structure

Default Structure of a UITableViewCell

A table cell can be broken into three parts:

  • Image – the left part is reserved for displaying thumbnail just like what we’ve done in the Simple Table App tutorial
  • Content – the main part is used for displaying text label and detailed text
  • Accessory view – the right part is reserved for accessory view. There are three types of default accessory view including disclosure indicator, detail disclosure button and check mark. The below figure shows you how these indicators look like.
TableCell Accessory View

UITableViewCell Accessory View

To display a check mark when a row is selected, you just need to add two lines of code after the “[messageAlert show]”:

The first line retrieves the selected table cell by using the indexPath. The second link updates the accessory view of the cell with a check mark.

Compile and run the app. After you tap a row, it’ll show you a check mark.

SimpleTableApp Check Mark

For now, when you select a row, that row will be highlighted in blue color. If you don’t like it, try to add the following code to deselect the row.

What’s Upcoming Next?

What do you think about the series of Table View tutorials? I hope you’ve learnt a ton! By now, you should have a better understanding about how to create table view, customize table cells and handle table row selection. Make sure you understand the information presented in the tutorials as UITableView is one of the common UI elements in iOS. If you have any questions, head to our forum and share with us.

There are still lots of stuffs to learn in iOS programming. In coming tutorials, we’ll see how you can replace the recipe array with a file and explore Navigation Controller, as well as, Storyboard to build a more complex application.

Update: You can now download the full source code of the Xcode project.

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  • Sue Wright

    Sue WrightSue Wright

    Author Reply

    I love your tutorials, you are the only one who makes complete sense. What I would like to do, is to take your Menu table example which is just what I was looking for and when you click on a recipe it brings up another viewcontroller scene with more details on. In my case the first cell on my table is BOAT abnd i want to bring up a viewconroller that has boat details on ( I have already designed and completed these) Please help me attache my table to these screens thanks


    • Simon Ng

      Simon NgSimon Ng

      Author Reply

      In the upcoming tutorials, I’ll show you how to use Storyboard and Navigation Controller to display the details of the recipes. This is a recommended UI practice as you can find in other apps.


  • Ross B

    Ross BRoss B

    Author Reply

    these tutorials are fantastic, I just wished you had more! By the way, you should put a link to this tutorial at the end of the previous one (unless i just missed it), but I had some trouble figuring out if there was one after the 2nd table view tutorial.

    keep up the good work, thanks a bunch.


    • Simon Ng

      Simon NgSimon Ng

      Author Reply

      Glad to hear the tutorials are useful. More will come in coming weeks. It’s my pleasure to share what I know about iOS programming.

      Also thanks for your suggestion. I’ll add a link after each tutorial.


  • Prabhakar Shanmugam

    Hi

    Your site is comparable to “http://tutsplus.com”

    Infact Better..

    Clean Site. No Ads.

    Please do more tutorials. Explanation is so clear that we dont need a video screen cast.

    Keep up the great work.

    Thank you
    Prabhakar Shanmugam


    • Simon Ng

      Simon NgSimon Ng

      Author Reply

      I love tutsplus.com. What a compliment! I’ll definitely put up more tutorials. It’s really great to help people learn iOS programming.


  • pdwalker

    pdwalkerpdwalker

    Author Reply

    The API documentation didn’t appear for me until after I selected, downloaded and installed the api documentation under Preferences, Downloads, Documentation.

    Just mentioning it in case someone else doesn’t have it installed and is wondering where it is.


  • Dj

    DjDj

    Author Reply

    im not sure why but I’ve looked over everything a ton of times but no display message pops up and I’m fairly certain i got the didSelectRowAtPath code right it seems pretty simple but no message heres my viewcontroller.m file

    //
    // SimpleTableViewController.m
    // SimpleTable2
    //
    // Created by newuser on 5/30/12.
    // Copyright (c) 2012 __MyCompanyName__. All rights reserved.
    //

    #import “SimpleTableViewController.h”
    #import “SimpleTableCell.h”

    @interface SimpleTableViewController ()

    @end

    @implementation SimpleTableViewController
    {
    NSArray *tableData;
    NSArray *thumbnails;
    NSArray *timeLabel;

    }
    – (void)viewDidLoad
    {
    [super viewDidLoad];

    // Initialize Table Data
    tableData = [NSArray arrayWithObjects:@”Egg Benedict”, @”Mushroom Risotto”, @”Full Breakfast”, @”Hamburger”, @”Ham and Egg Sandwich”, @”Creme Brelee”, @”White Chocolate Donut”, @”Starbucks Coffee”, @”Vegetable Curry”, @”Instant Noodle with Egg”, @”Noodle with BBQ Pork”, @”Japanese Noodle with Pork”, @”Green Tea”, @”Thai Shrimp Cake”, @”Angry Birds Cake”, @”Ham and Cheese Panini”, nil];

    //init thumbnails
    thumbnails = [NSArray arrayWithObjects:@”egg_benedict.jpg”, @”mushroom_risotto.jpg”, @”full_breakfast.jpg”, @”hamburger.jpg”, @”ham_and_egg_sandwich.jpg”, @”creme_brelee.jpg”, @”white_chocolate_donut.jpg”, @”starbucks_coffee.jpg”, @”vegetable_curry.jpg”, @”instant_noodle_with_egg.jpg”, @”noodle_with_bbq_pork.jpg”, @”japanese_noodle_with_pork.jpg”, @”green_tea.jpg”, @”thai_shrimp_cake.jpg”, @”angry_birds_cake.jpg”, @”ham_and_cheese_panini.jpg”, nil];
    //init Time
    timeLabel = [NSArray arrayWithObjects:@”30 mins”, @”30 mins”, @”30 mins”, @”30 mins”, @”30 mins”, @”30 mins”, @”30 mins”, @”30 mins”, @”30 mins”, @”30 mins”, @”30 mins”, @”30 mins”, @”30 mins”, @”30 mins”, @”30 mins”, @”30 mins”, nil];
    }

    – (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
    {
    return [tableData count];
    }
    – (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {
    static NSString *simpleTableIdentifier = @”SimpleTableCell”;

    SimpleTableCell *cell = (SimpleTableCell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

    if (cell == nil)
    {
    NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@”SimpleTableCell” owner:self options:nil];
    cell = [nib objectAtIndex:0];
    }

    cell.nameLabel.text = [tableData objectAtIndex:indexPath.row];
    cell.imageView.Image = [UIImage imageNamed:[thumbnails objectAtIndex:indexPath.row]];
    cell.timeLabel.text= [timeLabel objectAtIndex:indexPath.row];
    return cell;
    }

    – (void)viewDidUnload
    {
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    }

    – (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
    {
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
    }

    – (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath;
    {
    return 78;
    }

    – (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
    {
    UIAlertView *messageAlert = [[UIAlertView alloc]
    initWithTitle:@”Row Selected” message:@”You’ve Selected A Row” delegate:nil cancelButtonTitle:@”Ok” otherButtonTitles:nil];

    //display alert message
    [messageAlert show];
    }
    @end


    • salazzo

      salazzosalazzo

      Author Reply

      I’m running Xcode 4.6.2 and had this problem. I solved it by going to the SimpleTableViewController.xib file, control-dragging from the table view to the File’s Owner placeholder, and selecting delegate. After that, the alert box showed up when a row was selected. Hope this helps.


      • Jiadong

        JiadongJiadong

        Author Reply

        I have the same problem, but I checked the table view has selected delegate. And the alert box still did not pop up. By the way, I run Xcode 4.6.3.


    • Brad Woodard

      Did you set the in your interface (.h) file?

      @interface SimpleTableViewController : UIViewController


      • Mark Joseph Bureros

        @interface SimpleTableViewController : UIViewController is this correct ?

        it doesn’t pop up


    • Brad Woodard

      In addition to setting the UITableViewDelegate and UITableViewDataSource, did you also set the UIAlertViewDelegate in the interface (.h) file?


  • Amy

    AmyAmy

    Author Reply

    Terrific tutorials! My table looks a lot like what you have and this tutorial helped greatly in achieving the look I want, but I’m stuck in an area I don’t see mentioned. In didSelectTableViewCellAtIndex, I’d like to make a tweak to the text – say make it a different color. How do I get access to it? I can get to its accessory type and background, but can’t see how to get to the custom UILabels and custom UIImages.


    • Amy

      AmyAmy

      Author Reply

      For anyone interested .. I figured it out … when you are in one of the many didSelectRowAtIndexPath, willSelectRowAtIndexPath, etc … if you need to get to your custom labels, views, buttons, etc …

      where you normally might get your “standard” cell like this:
      UITableViewCell *cell=[myTableView cellForRowAtIndexPath:indexPath];

      you can call out to your custom cell like this:
      myCustomCell *cell=(myCustomCell *)[myTableView cellForRowAtIndexPath:indexPath];
      you need the (myCustomCell *) in order to “cast” your custom cell to tell the compiler to expect it a UITableViewCell.


      • Simon Ng

        Simon NgSimon Ng

        Author Reply

        Thanks for sharing the tips!


  • Kevin

    KevinKevin

    Author Reply

    I’m not sure why, but the first row that I select does not trigger the alert message. Every row selected DOES alert the message. Probably just a simulator bug, but just wanted some clarification if someone actually knows why that happens


  • jeehabara

    jeehabarajeehabara

    Author Reply

    I’m not sure if this has been addressed, but there are some things I would like to know about and see if there is an easy way to fix them. For instance, after selecting a row, it displays the message and shows the checkmark, however, upon scrolling further down the list, I found that every 6 rows, another row displays a checkmark as well. What is causing this?

    Additionally, I would also like to know how to clear the checkmark from the selected row.

    Thank you for your tutorials. They are a joy to follow and learn from. Keep going!


  • Tspoon

    TspoonTspoon

    Author Reply

    Quality tutorials. Don’t think I’ve seen any better. Well done!


  • Michal Mynarski

    These tutorials is such a great stuff. It’s better source of knowledge about programming than my lectures in college will ever be.

    But I have this little issue with my program after this tutorial.

    Alert never pops up after first clicking. It shows up after second (and then the check-mark arrived) and always give me information from last selection, not the current one.

    My code of this function:

    // funckcja odpowiedzialna za pojawianie się alertu przy wybieraniu

    – (void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath

    {

    //deklaracja alertu “messageAlert”

    UIAlertView *messageAlert = [[UIAlertView alloc]initWithTitle:@”Zaznaczono model” message:[tableData objectAtIndex:indexPath.row] delegate:nil cancelButtonTitle:@”OK” otherButtonTitles:nil, nil];

    //Wyświetlanie alertu

    [messageAlert show];

    //animacja zaznaczenia

    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];

    cell.accessoryType = UITableViewCellAccessoryCheckmark;

    [tableView deselectRowAtIndexPath:indexPath animated:YES];

    }

    @end

    Could You give me a hint about it?


    • Donheart Banderas

      Same issue than me, drove me crazy. Yor method is “didDeselectRowAtIndexPath” that takes the value of the “last selected”. Change it to the right one “didSelectRowAtIndexPath” and works fine.


      • Donheart Banderas

        I mean change from:

        -(void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath
        to this one:
        -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath


        • Michal Mynarski

          You’re just genius. Such a small thing, and I just cannot find it! Thank You so much!


      • Carles

        CarlesCarles

        Author Reply

        Wow, thank you very much! Had the same problem and was losing so much time trying to find what was wrong… Completely missed it!


  • Smadge

    SmadgeSmadge

    Author Reply

    Hi Simon,

    Thanks for all your help with these tutorials, where do you find the source code so we can debug our little problems that some of us run into once logged in to appcoda?

    Keep sharing Simon and thanks again


  • Kerrie Kelly Parker

    Hello. I’ve very much enjoyed this tutorial. I’m still very new to coding and while I’ve looked through everything trying to figure out, could I see the code for the exercise, this one below:

    Think about how you can alter the code (hint: the indexPath parameter contains the row number of the selected row) and display the message like the screenshot shown above. It’s not difficult to do so if you’ve followed the previous tutorial.

    Thank you.

    Kerrie


    • samKing

      samKingsamKing

      Author Reply

      might be a spoiler – but understand perplexing for very new coder. This worked.

      UIAlertView *messageAlert = [[UIAlertView alloc] initWithTitle:@”You Selected” message:[tableData objectAtIndex:indexPath.row] delegate:nil cancelButtonTitle:@”OK” otherButtonTitles:nil];


      • k0e3

        k0e3k0e3

        Author Reply

        How would I do something like “[tableData objectAtIndex:indexPath.row] selected”?


        • Bharatraj

          BharatrajBharatraj

          Author Reply

          U Can do the same with the following code:

          – (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

          {

          NSString *selectedRowInfo = @”You’ve selected a row : “;

          selectedRowInfo = [selectedRowInfo stringByAppendingString:[@(indexPath.row)description]];

          UIAlertView *messageAlert = [[UIAlertView alloc]

          initWithTitle:@”Row Selected” message:selectedRowInfo delegate:nil cancelButtonTitle:@”OK” otherButtonTitles:nil];

          // Display Alert Message

          [messageAlert show];

          }


  • YOPA

    YOPAYOPA

    Author Reply

    Tutorial works fine, EXCEPT that checkmark also appears 7 items down from item checked. Any solutions??


    • Sergiy Tkachuk

      The same for me. It seems the bug in the tutorial. Cells with checked marks are reused and checkmarks are not preserved. The solution is to store marks separately and restore values back in functions -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath.


      • Brad Woodard

        Sergiy, I don’t understand your reply. Can either you or Simon clarify?


        • Mike

          MikeMike

          Author Reply

          I’m pretty sure this happens because we’re using reusable cells. In order to save resources, iOS reuses cells as you scroll down, which is why you see the checkmark appear either at the 7th or 12th row (the height of the rows changes how many cells are shown on the screen at a time)

          there are probably a couple ways to solve this, but the first one that comes to mind is creating another array that stores whether or not a row was previously selected, and if so, draw the checkmark.


          • Mike

            MikeMike

            Author

            Although this isn’t a super elegant solution you can do this.

            1) Create a new array to hold whether or not a cell was selected
            NSMutableArray *tableData;
            NSMutableArray *thumbnails;
            NSMutableArray *prepTime;

            // NEW code
            NSMutableArray *rowsSelected;

            2) Initialise the array with a bunch of @NO boolean values (There are 16 here since previously we had 16 rows) This goes inside of viewDidLoad function

            rowsSelected = [NSMutableArray arrayWithObjects:@NO,@NO,@NO,@NO,@NO,@NO,@NO,@NO,@NO,@NO,@NO,@NO,@NO,@NO,@NO,@NO, nil];

            3) Add an if/else statement to draw the checkmark if the cell was previously selected. Inside the cellForRowAtIndexPath function

            // Existing code
            if(cell == nil){
            NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@”SimpleTableCell” owner:self options:nil];
            cell = [nib objectAtIndex:0];
            }

            // NEW code
            if([[rowsSelected objectAtIndex:indexPath.row]isEqual:@YES]){
            cell.accessoryType = UITableViewCellAccessoryCheckmark;
            }
            else{
            cell.accessoryType = UITableViewCellAccessoryNone;
            }

            4) Add code to set whether or not a row was selected. This goes inside didSelectRowAtIndexPath

            // Old code
            UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
            cell.accessoryType = UITableViewCellAccessoryCheckmark;

            // NEW code
            [rowsSelected replaceObjectAtIndex:indexPath.row withObject:@YES];


          • Guest

            GuestGuest

            Author

            *new code does not replace old code, it appends to it


          • st_mads

            st_madsst_mads

            Author

            did this work? any elegant solution found so far to address the multiple check issue?


  • Chris

    ChrisChris

    Author Reply

    I’m just starting (again) to learn making Apps, and so far these tutorials have helped a great deal. I think they are even better than the “for dummies” book I got last year. Short, simple, and small bites at a time, no deep explanations but hands on. I love it!


  • shailesh

    shaileshshailesh

    Author Reply

    Superb tutorial 🙂 Very nice 🙂


  • Brad Woodard

    Simon,
    Nice tutorial but I’m experiencing the same issue as YOPA – the checkmarks repeat every 12 cells. A fix has been suggested but I am unable to interpret what needs to be done in order to correct. Can you clarify or submit an update to the tutorial to eliminate the repeating checkmarks?


  • drwu

    drwudrwu

    Author Reply

    Instead of doing this: “For now, when you select a row, that row will be highlighted in blue color. If you don’t like it, try to add the following code to deselect the row.”

    [tableView deselectRowAtIndexPath:indexPath animated:YES];

    Just do the following in the “- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath” selector:

    cell.selectionStyle = UITableViewCellSelectionStyleNone;


  • Murtaza Lokhandwala

    simple & clear. Enjoy alot


  • maximkott

    maximkottmaximkott

    Author Reply

    Awesome introduction to iOS and Objective-C!!!


  • Tabish Sohail

    Hiii. i always use to follow your tutorials, and i really enjoy alot.

    But now iOS 7 has released.When will you introduce tutorials for iOS 7 or about the changes that has been introduced in iOS 7.

    how to make our apps compatible for iOS 6 iOS 7 both .?

    Thanx.


  • Hiếu Giề

    Nice tutorial !
    after select a row , i dont want select it any more , so how can i do it ?


    • King Dink

      King DinkKing Dink

      Author Reply

      – add new property after tableData property: NSMutableArray *checkRay;

      – in viewDidLoad: init this property checkRay = [[NSMutableArray alloc] initWithObjects:@NO, @NO,…., nil];

      – add these lines at last function cellForRowAtIndexPath (before return cell):

      if ([[checkRay objectAtIndex:indexPath.row] isEqual:@YES]){
      cell.accessoryType = UITableViewCellAccessoryCheckmark;
      } else {
      cell.accessoryType = UITableViewCellAccessoryNone;
      }

      – modify didSelectRowAtIndexPath function:

      if ([[checkRay objectAtIndex:indexPath.row] isEqual:@YES]){
      [checkRay replaceObjectAtIndex:indexPath.row withObject:@NO];
      } else {
      [checkRay replaceObjectAtIndex:indexPath.row withObject:@YES];
      }
      [tableView reloadRowAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationNone];


  • raven51

    raven51raven51

    Author Reply

    Hi,

    2 years ago I was distracted in the mobile world, which led me to start programming in C# for Windows phone.

    This year after trying to get involved in some kind of Entreprenership Startups, I soon realized that I was on the wrong track.

    Thaks to you all and to AppCoda I am getting a huge kick start in iOS programming. This web portal is very good and has the fundamental for a good start.

    Thnaks.

    raven51
    (17OUT2013, Portugal)


  • Madhur Sodhi

    Exercise Answer:-
    in uialertview :-
    message:[NSString stringWithFormat:@”%@”,[recipes objectAtIndex:indexPath.row]]


  • Mateusz S

    Mateusz SMateusz S

    Author Reply

    This project not working for me. When i check only one cell, then are checked many cells, not one.


  • Satish Kumar

    I’m not able to deselect the row checked can you Pl help me out


  • Tiago De Barros Hillesheim

    Couple of issues that I’m having so far:
    – Scroll stops at the cell 14 … doesn’t reach the end of the table.
    – Highlighted cell is gray, even though I had selected “blue” in the SimpleTableCell.xib.
    – When I select a cell, a second cell, down in the view, is also checked.

    did anyone manage to solve this?
    by the way, thanks Simon for the tuts. really impressive!
    cheers


    • jkd359

      jkd359jkd359

      Author Reply

      I’m pretty sure “gray” is the new blue for ios7 if you catch my drift. I’ve tried both selections in my xcode and they are always the gray colour.


  • jkd359

    jkd359jkd359

    Author Reply

    Everyone has been asking about the deselecting the row and checkmarks etc. This should solve most of the questions i think:

    – (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

    [tableView cellForRowAtIndexPath:indexPath].accessoryType = UITableViewCellAccessoryCheckmark;

    }

    – (void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath {

    [tableView cellForRowAtIndexPath:indexPath].accessoryType = UITableViewCellAccessoryNone;

    }


    • jkd359

      jkd359jkd359

      Author Reply

      Let me know if there are issues with this it worked for me.


      • st_mads

        st_madsst_mads

        Author Reply

        I’m still encountering the same problem.. not sure why still


        • jkd359

          jkd359jkd359

          Author Reply

          Any code you can post up so i can have a look?


        • jkd359

          jkd359jkd359

          Author Reply

          Sorry Disqus wasn’t notifying me of comments – if you are still encountering the issue post up your code and i’ll have a look.


  • emma

    emmaemma

    Author Reply

    for me an error box is appearing near the void area it says that. invalid argument type’void’to unary expression.
    what am i supposed to do now!??


  • varunpar

    varunparvarunpar

    Author Reply

    PLease correct the project as its selecting many rows while selecting only one…. appcoda is really helpful and we we expect quality code from it..


  • Sharad Goyal

    Hello, it is very good tutorial about table view. everything is very clear and sharp.
    thanks a lot for making such efforts to let other people know.


  • Rahul

    RahulRahul

    Author Reply

    How do i go to different view controllers on selecting different rows in the UITableView


  • Nivendru Gavaskar (DCPL)

    issue is that if you select a row and then scroll below cell will be also select


  • st_mads

    st_madsst_mads

    Author Reply

    i’m encountering the multiple-select issue still.. i select a row at the top and i find another row selected some rows down. any solution so far? thanks 🙂


    • jkd359

      jkd359jkd359

      Author Reply

      Post up your code and i’ll have a look.


      • st_mads

        st_madsst_mads

        Author Reply

        thank you. here it is (using xcode v5.1.1)..

        ======
        // SimpleTableViewController.m

        #import “SimpleTableViewController.h”

        @interface SimpleTableViewController ()

        @end

        @implementation SimpleTableViewController

        NSArray *tableData;

        NSArray *thumbnails;

        NSArray *prepTime;

        – (void)viewDidLoad

        {

        [super viewDidLoad];

        // Do any additional setup after loading the view, typically from a nib.

        tableData = [NSArray arrayWithObjects:@”Egg Benedict”, @”Mushroom Risotto”, @”Full Breakfast”, @”Hamburger”, @”Ham and Egg Sandwich”, @”Creme Brelee”, @”White Chocolate Donut”, @”Starbucks Coffee”, @”Vegetable Curry”, @”Instant Noodle with Egg”, @”Noodle with BBQ Pork”, @”Japanese Noodle with Pork”, @”Green Tea”, @”Thai Shrimp Cake”, @”Angry Birds Cake”, @”Ham and Cheese Panini”, nil];

        thumbnails = [NSArray arrayWithObjects:@”egg_benedict.jpg”, @”mushroom_risotto.jpg”, @”full_breakfast.jpg”, @”hamburger.jpg”, @”ham_and_egg_sandwich.jpg”, @”creme_brelee.jpg”, @”white_chocolate_donut.jpg”, @”starbucks_coffee.jpg”, @”vegetable_curry.jpg”, @”instant_noodle_with_egg.jpg”, @”noodle_with_bbq_pork.jpg”, @”japanese_noodle_with_pork.jpg”, @”green_tea.jpg”, @”thai_shrimp_cake.jpg”, @”angry_birds_cake.jpg”, @”ham_and_cheese_panini.jpg”, nil];

        prepTime = [NSArray arrayWithObjects:@”10 mins”, @”36 mins”, @”54 mins”, @”2.5 hrs”, @”15 mins”, @”10 mins”, @”10 mins”, @”5 mins”, @”45 mins”, @”7 mins”, @”25 mins”, @”30 mins”, @”5 mins”, @”30 mins”, @”2 hrs”, @”15 mins”, nil];

        }

        – (void)didReceiveMemoryWarning

        {

        [super didReceiveMemoryWarning];

        // Dispose of any resources that can be recreated.

        }

        -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

        {

        return [tableData count];

        }

        -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

        {

        static NSString *simpleTableIdentifier = @”SimpleTableCell”;

        SimpleTableCellTableViewCell *cell = (SimpleTableCellTableViewCell *) [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

        if (cell == nil) {

        //cell = [[SimpleTableCellTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];

        NSArray *nib = [[NSBundle mainBundle] loadNibNamed:simpleTableIdentifier owner:self options:nil];

        cell = [nib objectAtIndex:0];

        }

        //cell.textLabel.text = [tableData objectAtIndex:indexPath.row];

        cell.nameLabel.text = [tableData objectAtIndex:indexPath.row];

        //cell.imageView.image = [UIImage imageNamed:@”creme_brelee.jpg”];

        cell.thumbnailImageView.image = [UIImage imageNamed:[thumbnails objectAtIndex:indexPath.row]];

        cell.prepTimeLabel.text = [prepTime objectAtIndex:indexPath.row];

        return cell;

        }

        – (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath

        {

        return 78;

        }

        – (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

        {

        //NSString *selectedRowInfo = @”You’ve selected a row : “;

        //selectedRowInfo = [selectedRowInfo stringByAppendingString:[@(indexPath.row)description]];

        UIAlertView *messageAlert = [[UIAlertView alloc]

        initWithTitle:@”You’ve Selected” message:[tableData objectAtIndex:indexPath.row] delegate:nil cancelButtonTitle:@”OK” otherButtonTitles:nil];

        // Display Alert Message

        [messageAlert show];

        [tableView cellForRowAtIndexPath:indexPath].accessoryType = UITableViewCellAccessoryCheckmark;

        /*UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];

        cell.accessoryType = UITableViewCellAccessoryCheckmark;

        */

        [tableView deselectRowAtIndexPath:indexPath animated:YES];

        }

        @end


        • jkd359

          jkd359jkd359

          Author Reply

          Mmk, another way i do it is this:
          In your .h file create:

          @property (retain) NSIndexPath *lastIndexPath;

          and in your “cellforRowAtIndexPath”:

          if ([indexPath compare:self.lastIndexPath] == NSOrderedSame) {

          cell.accessoryType = UITableViewCellAccessoryCheckmark;

          } else {

          cell.accessoryType = UITableViewCellAccessoryNone;

          }

          and in your “didSelectRowAtIndexPath”:

          self.lastIndexPath = indexPath;

          [tableView reloadData];

          *Also get rid of :

          [[tableView cellForRowAtIndexPath:indexPath].accessoryType = UITableViewCellAccessoryCheckmark;

          /*UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];

          cell.accessoryType = UITableViewCellAccessoryCheckmark;

          */

          [tableView deselectRowAtIndexPath:indexPath animated:YES];

          }


  • Arelem

    ArelemArelem

    Author Reply

    I am very new to Xcode but have done rails and php so not new to programming. I find that most iphone/xcode tutorials tried simply do not work.
    As a newbie have no idea what the error messages mean and as usual Google is helpless it reverts to StackOverflow which is for experts.
    For me, the **only** Tuts_to_work_first_shot so far are these. Well Done, Excellent tuts, easy to follow well thought out and no verbal guff between the explanations. This guy is a great teacher. I will do all of these with enjoyment and recommend them to others. Thank you again.


  • Sumit Singh Arya

    it is perfect but when i scrolled tableview cell then check mark is been hide then how i stop that
    please suggest


  • russell

    russellrussell

    Author Reply

    Im on xcode 5 my checkbox is only showing up on the similator when I choose resizable phone but not on iphone 5 or 6. I am guessing I need to change the size of my main story board? How can I get it to fit the simulator screen? Great tuts by the way.


    • Gregoriz

      GregorizGregoriz

      Author Reply

      I’ve got the exact same problem. You gave me a nice hint there but as a newby, I don’t see what could make it happens


  • soumyapc

    soumyapcsoumyapc

    Author Reply

    hi I am using Xcode 3.2.4 . My app crashes when I write

    – (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

    UIAlertView *messageAlert = [[UIAlertView alloc]
    initWithTitle:@”Row Selected” message:[tableData objectAtIndex:indexPath.row] delegate:nil cancelButtonTitle:@”OK” otherButtonTitles:nil,nil];

    [messageAlert show];
    }
    but it will work if I put message:@”whatever message”. Not able to figure out the error.


  • Charles Reidy

    When I try to implement the tableView didSelectRowAtIndexPath method as written above, I get an error – “invalid argument type ‘void’ to unary expression. I don’t know why void doesn’t work, since there is no return value in the method. I’m running XCode 4.6.


  • Alex Sandro

    My UItableviewcessory not this showing! someone could help me ?


  • Rakesh Singh

    Hello,

    there is bug in your project ,, you cant select 0 index of the product show in uitableview controller .
    and another bug is when user select (Ex:- 2,4 index value) and scroll the view then it show any two index values randomly selected (with check mark)…. plz give me solution….


  • Kotecha Harshil

    when i scrolled tableview cell then check mark is been check many other row which i never select after scroll top index will be change.


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