Question

I’m sure I’m overlooking the obvious as I’ve got countless working buttons…but…for whatever reason this one is not cooperating…

I’ve added a UIButton (Rounded Rect) to a UIView subclass (DialogView) which is a subview of my view controller’s view. This subview is created almost entirely in IB. I’ve wired up the button to (IBAction)okButtonPressed:(id)sender in IB to Touch Up Inside and created a corresponding method in DialogView. However when I “touch” this button it doesn’t trigger the method. userInteractionEnabled is true for the VC’s view, DialogView and the UIButton.

Thinking maybe initWithCoder had to do some frame manipulation or something I added the following which successfully logs to console.

- (id)initWithCoder:(NSCoder *)decoder {
    if (self = [super initWithCoder:decoder]) {
        NSLog(@"DialogView initWithCoder called");
    }
    return self;
}

In further exploration I wired up an IBOutlet to the button and then if I try to change the titleLabel from the view controller I notice that it get’s severely truncated. Default text of say “Press Me!” set in IB displays fine when view is first drawn. But if I change the text…

self.DialogView.okButton.titleLabel.text = @"Not Working";

…it gets truncated to “N…”

Dunno if this is related. Probably…

Anyone see what I’ve screwed up here?

Edit (adding code related to showing UIButton):

From the View Controller:

self.DialogView = [[[NSBundle mainBundle] loadNibNamed:@"DialogView" owner:self options:nil] objectAtIndex:0];; 
self.DialogView.myVC = self;
self.DialogView.backgroundColor = [UIColor clearColor];
self.DialogView.center = CGPointMake(self.view.frame.size.width / 2, self.view.frame.size.height / 2);
self.DialogView.nameLabel.text = loan.fullName;
self.DialogView.noteLabel.text = loan.summaryOfLoan;
self.DialogView.amountLabel.text = [currencyFormatter stringFromNumber:loan.originalAmount];
self.DialogView.alpha = 0.0;
[self.view addSubview:DialogView];

The UILabels all displaying as expected. As is the problem UIButton. I can see it I just can’t interact with it!?!

DialogView’s interface:

@class MyViewController;

@interface DialogView : UIView {
    IBOutlet UILabel *nameLabel, *noteLabel, *amountLabel;
    IBOutlet UIImageView *arrowView;
    IBOutlet UIButton *okButton;
    MyViewController *myVC;
}

@property (nonatomic, retain) UILabel *nameLabel, *noteLabel, *amountLabel;
@property (nonatomic, retain) UIImageView *arrowView;
@property (nonatomic, assign) MyViewController *myVC;
@property (nonatomic, retain) UIButton *okButton;

- (IBAction)okButtonPressed:(id)sender;

@end

And DialogView’s implementation:

#import "DialogView.h"
#import "MyViewController.h"

@implementation DialogView

@synthesize nameLabel, noteLabel, amountLabel, arrowView, okButton;
@synthesize myVC;

- (void)dealloc {
    [nameLabel release];
    [noteLabel release];
    [amountLabel release];
    [arrowView release];
    [okButton release];
    [super dealloc];
}

- (id)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        // Initialization code
    }
    return self;
}

- (id)initWithCoder:(NSCoder *)decoder {
    if (self = [super initWithCoder:decoder]) {
        NSLog(@"DialogView initWithCoder called");
    }
    return self;
}

- (IBAction)okButtonPressed:(id)sender {
    NSLog(@"pressed DialogView OK button");
    [self.myVC.navigationController popViewControllerAnimated:YES];
}

- (void)drawRect:(CGRect)rect {
    // Drawing code
}


@end

Answer 1

I thought that we should use -setTitle:forState: in order to set button’s title ?

An other thought, did you check that the button’s frame is not CGRectZero ? And by the way, all the frames for the view in the hierarchy ? And check that one superview in the hierarchy is not user interaction disabled ?
And, I think imageView does not respond to touches, do you have one in your code ?