核心动画-05-基础动画-day4

//
//  ViewController.m
//  05 基本动画
//
//  Created by ZhuJiaCong on 16/4/18.
//  Copyright © 2016年 wxhl. All rights reserved.
//

#import "ViewController.h"

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

@end

@implementation ViewController



- (IBAction)start:(id)sender {
    
    //1 初始化动画对象
    //keyPath在动画过程中，需要改变的值
    CABasicAnimation *basicAnimation = [CABasicAnimation animationWithKeyPath:@"position"];
    //2设置属性改变的值
    basicAnimation.fromValue = [NSValue valueWithCGPoint:CGPointMake(150, 0)];
    basicAnimation.toValue = [NSValue valueWithCGPoint:CGPointMake(150, 500)];
    
    //动画持续时间
    basicAnimation.duration = 3;
    
    //动画自动回播
    //在动画结束后，回自动的倒序播放动画，返回动画起始状态
    //单次播放时间不变，总时间为原来的两倍
    basicAnimation.autoreverses = NO;
    
    //循环次数 不会改变每一次动画持续的时间
    basicAnimation.repeatCount = 5;
    //设定动画的开始时间
//    basicAnimation.beginTime = CACurrentMediaTime() + 3;
    //动画的填充模式
    /*
     kCAFillModeForwards       在动画结束播放之后，将图层保留结束为止
     kCAFillModeBackwards      在动画没有开始之前，将图层保留在起点位置
     kCAFillModeBoth           上面两者的集合
     kCAFillModeRemoved        当动画结束之后，移除动画效果，图层返回最初时状态
     */
    basicAnimation.removedOnCompletion = NO;
    
    basicAnimation.fillMode = kCAFillModeBoth;
    
    
    //播放速度 不会影响等待的时间
//    basicAnimation.speed = 2.0;
    //时间的偏移量
    basicAnimation.timeOffset = 1.5;
    
    
    //将动画添加到图层上去
    [_imageView.layer addAnimation:basicAnimation forKey:@"basic"];
    
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end