一个简单的果冻弹动动画

代码：
 1 CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale"];
 2     [animation setDuration:.6];
 3     NSMutableArray *values = [NSMutableArray array];
 4     [values addObject:[NSNumber numberWithFloat:1.0]];
 5     [values addObject:[NSNumber numberWithFloat:1.2]];
 6     [values addObject:[NSNumber numberWithFloat:1.0]];
 7     [values addObject:[NSNumber numberWithFloat:1.1]];
 8     [values addObject:[NSNumber numberWithFloat:1.0]];
 9     [animation setValues:values];
10     [animation setRemovedOnCompletion:YES];
11     [animation setAutoreverses:NO];
12     animation.timingFunction =[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
13     [_animationView.layer addAnimation:animation forKey:@"transform.scale"];