简介
注意事项
animations(NSArray
效果图
实现思路
实现步骤
@property (weak, nonatomic) IBOutlet UIView *redView;
//创建动画组对象 CAAnimationGroup *group = [CAAnimationGroup animation]; //设置动画组的执行时间 group.duration = 1.0; //创建基本动画对象,用来进行缩放 CABasicAnimation *scale = [CABasicAnimation animation]; scale.keyPath = @"transform.scale"; scale.fromValue = @1.0; scale.toValue = @0.5; //创建基本动画对象,用来进行旋转 CABasicAnimation *rotation = [CABasicAnimation animation]; rotation.keyPath = @"transform.rotation"; rotation.toValue = @(arc4random_uniform(M_PI * 2)); //创建基本动画对象,用来修改位置 CABasicAnimation *position = [CABasicAnimation animation]; position.keyPath = @"position"; position.toValue = [NSValue valueWithCGPoint:CGPointMake(arc4random_uniform(200) + 20, arc4random_uniform(200) + 20)]; //将基本动画添加到动画组中 group.animations = @[scale, rotation, position];
[self.redView.layer addAnimation:group forKey:nil];
self.redView.layer.backgroundColor = [self randomColor].CGColor;
//返回随机颜色 - (UIColor *)randomColor { return [UIColor colorWithRed:arc4random_uniform(255) / 255.0 green:arc4random_uniform(255) / 255.0 blue:arc4random_uniform(255) / 255.0 alpha:1.0]; }