CAAnimationを連続的に実行したいときによしなにしてくれるクラス (アニメーションのbeginTimeとdurationを勝手に計算する
Lib以下のファイルをimport
``
VGASequentialAnimationGroup *animationGroup = [[VGASequentialAnimationGroup alloc] init];
CABasicAnimation *animation1 = [[CABasicAnimation alloc] init];
CABasicAnimation *animation2 = [[CABasicAnimation alloc] init];
CABasicAnimation *animation3 = [[CABasicAnimation alloc] init];
[animationGroup addAnimation:animation1
duration:1.0f];
[animationGroup addAnimation:animation2
duration:1.0f];
[animationGroup addAnimation:animation3
duration:1.0f];
[view.layer addAnimation:animationGroup
forKey:@"demo-animation"];
``