iPhone UIButton addTarget不起作用

Question

In my iPhone app, I have SPGameDesk : UIView class, creating it from other class like:

SPGameDesk* gameDesk = [[SPGameDesk alloc] init];
[gameDesk createWithLevel:5];
[appWindow addSubview:gameDesk];

In my SPGameDesk class, in one method, I create UIButtons :

holesRow = [[NSMutableArray alloc] init];
for (int i=0; i<3; i++) {
    [holesRow addObject:[[UIButton alloc] initWithFrame:CGRectMake((40*i)+5, 150, 30, 30)]];
    [[holesRow objectAtIndex:i] setBackgroundColor:[UIColor blueColor]];
    [[holesRow objectAtIndex:i] addTarget:self action:@selector(holeSelected:) forControlEvents:UIControlEventTouchUpInside];
    [self addSubview: [holesRow objectAtIndex:i]]; 
}

And lower in SPGameDesk class I have method:

- (void)holeSelected:(id)sender {
    NSLog(@"SELECTED");
}

But when I touch my button, nothing happens, like some other UIView covers my button (there is no other UIView ), or like SPGameDesk has userInteraction disabled (I checked - it is not).

Where is my problem? What should I check?

Answer 1

What is the frame for your gameDesk view? It looks like it could be 0,0,0,0. Try setting it to the bounds of the parent window. Use initwithframe instead of init.