核心动画 （CAAnimationGroup）

Main.storyboard

ViewController.m

//

//  ViewController.m

//  8A05.核心动画 CAAnimationGroup

//

//  Created by huan on 16/2/5.

//  Copyright © 2016年 huanxi. All rights reserved.

//

#import "ViewController.h"

@interface ViewController ()

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

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

}

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

//有一张图片，同时可以平移、旋转、缩放的效果

//实现这个效果 使用组动画【CAAnimatonGroup】

//组动画怎么使用

//1.创建对象

CAAnimationGroup *group = [CAAnimationGroup animation];

//2.往里面添加多个动画

//2.1 平移动画

CABasicAnimation *positionAni = [CABasicAnimation animation];

positionAni.keyPath = @"position";

positionAni.toValue = [NSValue valueWithCGPoint:CGPointMake(250, 250)];

//2.2 旋转动画

CABasicAnimation *rotationAni = [CABasicAnimation animation];

rotationAni.keyPath = @"transform.rotation";

rotationAni.toValue = @(M_PI_2);

//2.3 缩放的效果

CABasicAnimation *scaleAni = [CABasicAnimation animation];

scaleAni.keyPath = @"transform.scale";

scaleAni.toValue = @(0.5);

group.duration = 3;

group.animations = @[positionAni, rotationAni, scaleAni];

//3.把组动画添加到图层上

[self.imageView.layer addAnimation:group forKey:nil];

}

@end