ios核心动画之组动画

 1     // 平移动画
 2     CABasicAnimation *a1 = [CABasicAnimation animation];
 3     a1.keyPath = @"transform.translation.y";
 4     a1.toValue = @(100);
 5     // 缩放动画
 6     CABasicAnimation *a2 = [CABasicAnimation animation];
 7     a2.keyPath = @"transform.scale";
 8     a2.toValue = @(0.0);
 9     // 旋转动画
10     CABasicAnimation *a3 = [CABasicAnimation animation];
11     a3.keyPath = @"transform.rotation";
12     a3.toValue = @(M_PI_2);
13     
14     // 组动画
15     CAAnimationGroup *groupAnima = [CAAnimationGroup animation];
16     
17     groupAnima.animations = @[a1, a2, a3];
18     
19     groupAnima.duration = 2;
20     groupAnima.fillMode = kCAFillModeForwards;
21     groupAnima.removedOnCompletion = NO;
22     
23     [self.iconView.layer addAnimation:groupAnima forKey:nil];