StackOverflow2013

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2012-11-03T21:51:32.480
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This should do the trick <pre><code>-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{ CALayer *rocketPresentationLayer = [self.rocket.layer presentationLayer]; self.rocket.layer.position = rocketPresentationLayer.position; [UIView animateWithDuration:3 delay:0 options:UIViewAnimationOptionCurveEaseIn|UIViewAnimationOptionBeginFromCurrentState animations:^(){self.rocket.frame=CGRectMake(self.rocket.frame.origin.x, -40, 25, 40);} completion:^(BOOL finished){}]; } </code></pre> Note 1: I didn't put logic in here to check whether the user tapped the rocket again, when it is taking off vertically. You might want to add a <code>BOOL</code> or something to see if the user successfully hit the rocket or not, and if so, don't perform the vertical animation again. Note 2: If in future you only want this to occur when the rocket is hit, you can use <code>hitTest</code> checking to call the animation conditionally. <pre><code>// Get the touch UITouch *touch = [touches anyObject]; CGPoint touchPoint = [touch locationInView:self.view]; // See if we hit the rocket CALayer *rocketPresentationLayer = [self.rocket.layer presentationLayer]; CALayer* hitTest = [rocketPresentationLayer hitTest:touchPoint]; // If we did, then stop animation and move upwards if (hitTest) { .... } </code></pre> P.S: Also as a slight mention, <code>@property UIImageView *rocket;</code> should be changed to <code>@property (nonatomic) UIImageView *rocket;</code>. This is primarily for performance reasons, as I don't expect your rocket to be accessed by multiple threads (it shouldn't, it's the UI!).
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1. POHow do I change an animation for an object while it is already animating?
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1. USWDUK
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1. USWDUK
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1. POHow do I change an animation for an object while it is already animating?
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