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POHow Do You CAKeyframeAnimation Scale?
 

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  1. POHow Do You CAKeyframeAnimation Scale?
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    <p>I want to create an animation with several key frames. I want my Layer (a button in this case) to scale up to 1.5 then down to 0.5 then up to 1.2 then down to 0.8 then 1.0.</p> <p>I also want to EaseIn and EaseOut of each keyframe.</p> <p>As you can imagine, this will create a Springy/Bounce effect on the spot.</p> <p>In other parts of my app I have been using CAKeyframeAnimation like this (see below code). This creates a similar springy animation but for x and y position.</p> <p><strong>Can I adapt the below code to affect scale instead of position?</strong></p> <p>Thank you in advance!</p> <pre><code>- (CAAnimation*)monInAnimation { CGMutablePathRef path = CGPathCreateMutable(); CGPathMoveToPoint(path,NULL,113,320); CGPathAddLineToPoint(path, NULL, 113.5, 283); CGPathAddLineToPoint(path, NULL, 113.5, 179); CGPathAddLineToPoint(path, NULL, 113.5, 207); CGPathAddLineToPoint(path, NULL, 113.5, 187); CGPathAddLineToPoint(path, NULL, 113.5, 199); CGPathAddLineToPoint(path, NULL, 113.5, 193); CGPathAddLineToPoint(path, NULL, 113.5, 195); CGPathAddLineToPoint(path, NULL, 113.5, 194); CAKeyframeAnimation * animation = [CAKeyframeAnimation animationWithKeyPath:@"position"]; [animation setPath:path]; [animation setDuration:1.5]; [animation setCalculationMode:kCAAnimationLinear]; NSArray *arr = [NSArray arrayWithObjects:[NSNumber numberWithFloat:0.0], [NSNumber numberWithFloat:0.12], [NSNumber numberWithFloat:0.24], [NSNumber numberWithFloat:0.36], [NSNumber numberWithFloat:0.48], [NSNumber numberWithFloat:0.60], [NSNumber numberWithFloat:0.72], [NSNumber numberWithFloat:0.84], [NSNumber numberWithFloat:1.0],nil]; [animation setKeyTimes:arr]; [animation setTimingFunctions:[NSArray arrayWithObjects:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn], [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut], [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut], [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut], [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut], [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut], [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut], [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut], [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut], nil]]; //[animation setAutoreverses:YES]; CFRelease(path); return animation; </code></pre> <p>}</p> <pre><code>- (void)monBtnIn { [monButton.layer setPosition:CGPointMake(113.5,194)]; [monButton.layer addAnimation:[self monInAnimation] forKey:@"position"]; </code></pre> <p>}</p>
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