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iOS

Posted by Matthew Waller
Matthew Waller
1,698 Points

App Puzzle

Hello. I have an animation of the kind used in the Crystal Ball app tutorial. My UiImage *imageView ends on the last frame of the animation.

When the last image is displayed, I would like to disable the button (buttonOne) that starts the animation, and for the animation to reset when another button (buttonTwo) is pressed. Button2 puts the first image of the animation on display, so it is not displaying the last image. So basically, I'm trying to figure out a way to let the user reset the animation.

My question: how do I disable buttonOne when the last image is on display, and enable buttonOne again when the first image is on display?

Here was my first attempt:

- (IBAction)buttonOne:(UIButton *)sender {
if (self.imageView.image == [self.imageView.animationImages lastObject]) {[self.buttonOne setEnabled:NO];}
else {[self.buttonOne setEnabled:YES];}

So far, the button just stays disabled. Any ideas?

1 Answer

Matthew Waller
Matthew Waller
1,698 Points

Well, here is the answer to my puzzle.

Here was how to reset:

at the end of the buttonOne method I put [self.buttonOne setEnabled:NO]; and at the end of the buttonTwo method (which resets the image) I put [self.buttonOne setEnabled:YES];

Someone pointed out to me that I can't re-enable buttonOne in the buttonOne method because buttonOne has already been disabled.