简单的转菊花

1.初始化CAReplicatorLayer对象

• 初始化复制层,设置位置,尺寸,颜色大小

  //1.初始化复制层
  CAReplicatorLayer *replicatorLayer = [CAReplicatorLayer layer];
  replicatorLayer.bounds = CGRectMake(0, 0, 200, 200);
  replicatorLayer.backgroundColor = [UIColor grayColor].CGColor;
  [self.view.layer addSublayer:replicatorLayer];
  

• 创建原生图层,设置基本单位图层的大小,尺寸,颜色等

      //初始化原生子层
  CALayer *layer = [CALayer layer];
  layer.bounds = CGRectMake(0, 0, 10, 10);
  layer.cornerRadius = 5;
  layer.position = CGPointMake(100, 20);
  layer.backgroundColor = [UIColor blackColor].CGColor;
  [replicatorLayer addSublayer:layer];
  

Snip20160312_13.png

• 给原生层添加动画

      //给原生子层添加动画
          CABasicAnimation *basic = [CABasicAnimation animation];
          basic.keyPath = @"transform.scale";
          basic.repeatCount = MAXFLOAT;//设置重复次数
          basic.autoreverses = YES;//设置动画的反弹效果
          basic.fromValue = @1;
          basic.toValue = @0.1;
          //动画时长
          CGFloat duration = 1;
          basic.duration = duration;
          [layer addAnimation:basic forKey:nil];
  

• 设置复制层的子层数量,子层的形变位置等

      //子层数
          float count = 30;
          replicatorLayer.instanceCount = count;
          //一个单位图层动画时长为1 ,(从大到小,从小到大,2个阶段) ,延迟子层的延迟时间 = 动画总时长 / 总个数 * 2个阶段
          replicatorLayer.instanceDelay = duration / count * 2;
          replicatorLayer.instanceTransform = CATransform3DRotate(layer.transform, 2 * M_PI / count, 0, 0, 1);
  

Snip20160312_14.png