图片的抖动

Main.storyboard

ViewControlller.m

// ViewController.m

// 8A03.图片的抖动

// Created by huan on 16/2/4.

#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.

}

-(IBAction)start{

//抖动图片使用帧动画设置旋转的路径

CAKeyframeAnimation *rotationAni = [CAKeyframeAnimation animation];

rotationAni.keyPath = @"transform.rotation";

//计算好旋转的弧度

CGFloat angle = M_PI_4 * 0.3;

//设置旋转的路径 (状态)

rotationAni.values = @[@(-angle),@(angle), @(-angle)];

//设置动画执行的次数

rotationAni.repeatCount = MAXFLOAT;

[self.imageView.layer addAnimation:rotationAni forKey:@"shake"];

}

-(IBAction)stop{

//通过key把动画移除

[self.imageView.layer removeAnimationForKey:@"shake"];

}

@end

结果