核心动画-05-基础动画-day4

 1 //
 2 //  ViewController.m
 3 //  05 基本动画
 4 //
 5 //  Created by ZhuJiaCong on 16/4/18.
 6 //  Copyright © 2016年 wxhl. All rights reserved.
 7 //
 8 
 9 #import "ViewController.h"
10 
11 @interface ViewController ()
12 @property (weak, nonatomic) IBOutlet UIImageView *imageView;
13 
14 @end
15 
16 @implementation ViewController
17 
18 
19 
20 - (IBAction)start:(id)sender {
21     
22     //1 初始化动画对象
23     //keyPath在动画过程中，需要改变的值
24     CABasicAnimation *basicAnimation = [CABasicAnimation animationWithKeyPath:@"position"];
25     //2设置属性改变的值
26     basicAnimation.fromValue = [NSValue valueWithCGPoint:CGPointMake(150, 0)];
27     basicAnimation.toValue = [NSValue valueWithCGPoint:CGPointMake(150, 500)];
28     
29     //动画持续时间
30     basicAnimation.duration = 3;
31     
32     //动画自动回播
33     //在动画结束后，回自动的倒序播放动画，返回动画起始状态
34     //单次播放时间不变，总时间为原来的两倍
35     basicAnimation.autoreverses = NO;
36     
37     //循环次数 不会改变每一次动画持续的时间
38     basicAnimation.repeatCount = 5;
39     //设定动画的开始时间
40 //    basicAnimation.beginTime = CACurrentMediaTime() + 3;
41     //动画的填充模式
42     /*
43      kCAFillModeForwards       在动画结束播放之后，将图层保留结束为止
44      kCAFillModeBackwards      在动画没有开始之前，将图层保留在起点位置
45      kCAFillModeBoth           上面两者的集合
46      kCAFillModeRemoved        当动画结束之后，移除动画效果，图层返回最初时状态
47      */
48     basicAnimation.removedOnCompletion = NO;
49     
50     basicAnimation.fillMode = kCAFillModeBoth;
51     
52     
53     //播放速度 不会影响等待的时间
54 //    basicAnimation.speed = 2.0;
55     //时间的偏移量
56     basicAnimation.timeOffset = 1.5;
57     
58     
59     //将动画添加到图层上去
60     [_imageView.layer addAnimation:basicAnimation forKey:@"basic"];
61     
62 }
63 
64 - (void)viewDidLoad {
65     [super viewDidLoad];
66     // Do any additional setup after loading the view, typically from a nib.
67 }
68 
69 - (void)didReceiveMemoryWarning {
70     [super didReceiveMemoryWarning];
71     // Dispose of any resources that can be recreated.
72 }
73 
74 @end