CoreAnimation (CALayer 动画)

CoreAnimation基本介绍：

• CoreAnimation动画位于iOS框架的Media层
• CoreAnimation动画实现需要添加QuartzCore.Framework
• CoreAnimation基本上是LayerAnimation

CoreAnimation分类：

CoreAnimation作用：

CoreAnimation

CALayer基本介绍

CALayer的常用属性

CABasicAnimation

CAKeyframeAnimation

CAAnimationGroup

CASpringAnimation

XIB分别设置几个button然后关联方法，代码展示：

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIImageView *imageView;

@end

@implementation ViewController
#pragma mark - CABasicAnimation
- (IBAction)CABasicAnimation:(id)sender {
    // 第一步：创建动画对象
    CABasicAnimation *basicAnimation = [CABasicAnimation animation];
    // 第二步：告诉layer层需要执行什么样的动画（后边设置的内容为CALayer的相关属性）
    basicAnimation.keyPath = @"position";  // position 改变位置的
    // 第三步：告诉layer从哪里来，到哪里去
    basicAnimation.fromValue = [NSValue valueWithCGPoint:CGPointMake(100, 100)];
    basicAnimation.toValue = [NSValue valueWithCGPoint:CGPointMake(300, 600)];
    // 注意点： 如果要实现图片不会到原来点，需要以下两句代码
    basicAnimation.removedOnCompletion = NO;
    // 设置保存动画状态的内容
    basicAnimation.fillMode = kCAFillModeForwards;
    
    // 第四步：设置动画持续的时长
    basicAnimation.duration = 6.0f;
    // 第五步：将要执行的动画添加到calayer上
    [self.imageView.layer addAnimation:basicAnimation forKey:@"basic"];
    // *************翻转效果
    CABasicAnimation *basic = [CABasicAnimation animation];
    basic.keyPath = @"transform";
    // 设置翻转的地方
    basic.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeRotation(M_PI_2, 0, 0, 1)];
    basic.duration = 0.2f;
    [self.imageView.layer addAnimation:basic forKey:@"aaaa"];
    // 根据key去移除动画
    //    [self.imageView.layer removeAnimationForKey:@"basic"];
}

#pragma mark - CAKeyframeAnimation
- (IBAction)CAKeyAnimation:(id)sender {
    // 第一步：创建对象
    CAKeyframeAnimation *keyAnimation = [CAKeyframeAnimation animation];
    // 第二步：设置动画轨迹
    keyAnimation.keyPath = @"transform.rotation";
    // 第三步：设置翻转的角度 (弧度计算公式：度数/180*M_PI)
    keyAnimation.values = @[@(-300 / 180.0 * M_PI), @(300 / 180.0 * M_PI), @(-180 / 180.0 * M_PI)];
    // 第四步：设置时长
    keyAnimation.duration = 15.0f;
    // 第五步：添加动画到layer层
    [self.view.layer addAnimation:keyAnimation forKey:@"bbbb"];
}

#pragma mark - CAAnimationGroup
- (IBAction)CAAnimationGroup:(id)sender {
    // 平移动画
    CABasicAnimation *basic1 = [CABasicAnimation animation];
    basic1.keyPath = @"transform.translation.y";    // 按照y轴平移
    basic1.toValue = @(400);
    // 缩小动画
    CABasicAnimation *basic2 = [CABasicAnimation animation];
    basic2.keyPath = @"transform.scale";  // 缩小
    basic2.toValue = @(0.3);
    // 旋转动画
    CABasicAnimation *basic3 = [CABasicAnimation animation];
    basic3.keyPath = @"transform.rotation";   // 旋转
    basic3.toValue = @(M_PI);
    
    // 需要创建管理各个动画的动画组
    CAAnimationGroup *group = [CAAnimationGroup animation];
    group.animations = @[basic1,basic2,basic3];
    // group 会自动分配时间
    group.duration = 5.0f;
    
    [self.imageView.layer addAnimation:group forKey:@"ccccc"];
}

#pragma mark - CASpring
- (IBAction)CASpring:(id)sender {
    // 设置对象
    CASpringAnimation *spring = [CASpringAnimation animation];
    spring.keyPath = @"transform.scale";
    spring.fromValue = @1;
    spring.toValue = @0.2;
    spring.duration = 3.0f;
    
    [self.imageView.layer addAnimation:spring forKey:@"ddddd"];
}

@end

总结：