CAAnimationGroup 动画组的应用

 1     CABasicAnimation* rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
 2     rotationAnimation.toValue = [NSNumber numberWithFloat:(2 * M_PI) * 3];
 3     rotationAnimation.duration = 1.9f;
 4     rotationAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
 5     
 6     CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
 7     scaleAnimation.fromValue = [NSNumber numberWithFloat:0.0];
 8     scaleAnimation.toValue = [NSNumber numberWithFloat:1.0];
 9     scaleAnimation.duration = 2.0f;
10     scaleAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
11     
12     CAAnimationGroup *animationGroup = [CAAnimationGroup animation];
13     animationGroup.duration = 2.0f;
14     animationGroup.autoreverses = YES;
15     animationGroup.repeatCount = HUGE_VALF;
16     [animationGroup setAnimations:[NSArray arrayWithObjects:rotationAnimation, scaleAnimation, nil]];
17 
18     [logoLayer addAnimation:animationGroup forKey:@"animationGroup"];

1 [anim1 setBeginTime:0.0f];  // 设定第一个动画的开始时间
2 [anim2 setBeginTime:2.0f];  // 设定第二个动画的开始时间

这样可以按顺序显示动画效果