iOS--输入密码错误的时候,抖动

//
//  ViewController.m
//  密码错误--抖动动画
//
//  Created by 刘志武 on 16/8/6.
//  Copyright © 2016年 zhiwuLiu. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(50, 300, 200, 30)];
    label.backgroundColor = [UIColor purpleColor];
    label.tag = 1000;
    [self.view addSubview:label];
    
    
    
}

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
    
    UILabel *label = [self.view viewWithTag:1000];
    
    [self shakeAnimationForView:label];
    
    
}

#pragma mark 抖动动画
- (void)shakeAnimationForView:(UIView *) view
{
    // 获取到当前的View
    CALayer *viewLayer = view.layer;
    // 获取当前View的位置
    CGPoint position = viewLayer.position;
    // 移动的两个终点位置
    CGPoint x = CGPointMake(position.x + 5, position.y);
    CGPoint y = CGPointMake(position.x - 5, position.y);
    // 设置动画
    CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"position"];
    // 设置运动形式
    [animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
    // 设置开始位置
    [animation setFromValue:[NSValue valueWithCGPoint:x]];
    // 设置结束位置
    [animation setToValue:[NSValue valueWithCGPoint:y]];
    // 设置自动反转
    [animation setAutoreverses:YES];
    // 设置时间
    [animation setDuration:.06];
    // 设置次数
    [animation setRepeatCount:3];
    // 添加上动画
    [viewLayer addAnimation:animation forKey:nil];
    
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end