UIButton touchUpInside事件无法正确触发

Question

I have a tableview that contains a row with a custom cell that contains a UIButton . However, the button doesn't always fire the action. Here's my code:

   submitButton = [[UIButton alloc] init];

    [[submitButton layer] setBorderColor:[[UIColor whiteColor] CGColor]];
    [submitButton setClipsToBounds: YES];
    submitButton.backgroundColor = [UIColor grayColor];
    [submitButton setTitle:@"Send" forState:UIControlStateNormal];
    [self.contentView addSubview:submitButton];
    [submitButton addTarget:self action:@selector(buttonAction) forControlEvents:UIControlEventTouchUpInside];
    [submitButton release];

This is called in the custom cell's -(id)initWithStyle:

The buttonAction method looks like this:

 -(void)buttonAction
 {
     NSLog(@"Button Clicked!");
 }

It seems that the only way I can get the buttonAction to fire is if I press down on the button and release somewhere inside the cell's frame, but not inside the button itself. Why would that be?

* UPDATE * Problem still exists, but I found that the more consistent way to get the button to fire is to click and drag to the left or right and then let go, as long as I let go within the bounds of the cell/row.

UPDATE #2 It looks like if I use iOS 6.0, it works as intended. But on 5.0 or 5.1 it does not.

Answer 1

Try [submitButton sizeToFit] . I'm wondering whether your button has any size (since I don't see you giving it any).

Also: Create your button with [UIButton buttonWithType: UIButtonTypeCustom] instead of alloc-init.

Answer 2

Try assigning the same method call to TouchUpOutside as well - you should then see it work every time. TouchUpInside is only fired if you lift your finger while still within the bounds of the button.