Program 21.1

[joemac]

iPhone_1ViewController.m

When I push the button labeled 1 in the IOS simulator the click1 method doesn't add the number 1.

I'm guessing the iPhone_1ViewController.m is not written correctly however I don't get any build errors.

Can someone upload a copy of this file?

xcode Version 4.3.1

[JackRabbit]

Greetings joemac.

Here is the iPhone_1ViewController.m file.

Code: (Objective-C)

#import "ViewController.h"

@implementation ViewController

@synthesize display;

-(IBAction) click1
    {
        display.text = @"1";
    }

- (void)viewDidLoad
    {
        [super viewDidLoad];
        // Do any additional setup after loading the view, typically from a nib.
    }

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

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

@end

If this helps you and your app works like expected, let's talk about what went wrong in the first place and figure out why the correction fixed everything.

JR

Xcode Version 4.3

[joemac]

Still not working  .

I am using the iPhone 5.1 Simulator.  Xcode 4.3.1

When selecting the 1 button on the Simulator the button turns blue.  The #1 however still doesn't show up on the top right.

[seerex]

Hi mate,

First, are you sure the connections are set up properly? Try to ctrl-click (i think its ctrl-click, it's defo some key + click) on the button and the label, and see wether they are set to connect to the proper item.

If they both seem rightfully connected, you could place an NSLog call in the IBAction method linked to your button, and if that NSLog call gets printed out, you know that the action method get's called correctly.

If the action method gets called, it should work and the error lies in the way you are changing the label text. Make sure you did it properly, as in the book.

Let me know how it works out

[JackRabbit]

Greetings joemac

seerex gave some concrete advice to you. I am curious how it worked out. Give us an update.

JR

[wadechen]

I met the same problem here
because I linked the button twice
then I rebuild another button and link
it works ~
check the debugger