#import "ViewController.h"

@interface ViewController ()

/**

 按钮

 */

@property(nonatomic,weak)UIButton * btn;

/**

 遮盖按钮

 */

@property(nonatomic,weak)UIButton * alpahaBtn;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    //设置背景图片以便区分

    UIImageView * imgType=[[UIImageView alloc]initWithFrame:self.view.frame];

    imgType.image=[UIImage imageNamed:@"timg1"];

    [self.view addSubview:imgType];

    //创建阴影按钮

    UIButton * alpahaBtnType=[[UIButton alloc]init];

    //设置全屏

    alpahaBtnType.frame=self.view.frame;

    //设置背景颜色

    alpahaBtnType.backgroundColor=[UIColor lightGrayColor];

    //设置透明度

    alpahaBtnType.alpha=0.0;

    self.alpahaBtn=alpahaBtnType;

    [self.view addSubview:alpahaBtnType];

    [self.view bringSubviewToFront:alpahaBtnType];

    CGFloat cgW=self.view.bounds.size.width;

    CGFloat imgW=;

    CGFloat imgH=;

    CGFloat cgY=(cgW-imgW)*0.5;

    //创建按钮

    UIButton * btnType=[[UIButton alloc]init];

    //设置图片

    [btnType setImage:[UIImage imageNamed:@"timg"] forState:UIControlStateNormal];

    //设置位置

    btnType.frame=CGRectMake(cgY, cgY, imgW, imgH);

    self.btn=btnType;

    [self.view addSubview:btnType];

    /**

     设置点击事件

     */

    [alpahaBtnType addTarget:self action:@selector(alpahaBtnTypeClick) forControlEvents:UIControlEventTouchUpInside];

    [btnType addTarget:self action:@selector(btnClick) forControlEvents:UIControlEventTouchUpInside];

}

/**

 消失阴影

 还原图片

 */

-(void)alpahaBtnTypeClick{

   //调用动画

    [UIView animateWithDuration:2.0 animations:^{

        CGFloat cgW=self.view.bounds.size.width;

        CGFloat imgW=;

        CGFloat imgH=;

        CGFloat cgY=(cgW-imgW)*0.5;

      self.btn.frame=CGRectMake(cgY, cgY, imgW, imgH);

        self.alpahaBtn.alpha=0.0;

    }];

}

/**

 点击发大图片

 点击还原图片

 */

-(void)btnClick{

    if (self.alpahaBtn.alpha==) {

        //调用动画

        [UIView animateWithDuration:1.5 animations:^{

//            NSLog(@"%@",NSStringFromCGRect(self.btn.frame));

            CGFloat cgX=self.btn.frame.origin.x;

            CGFloat cgY=self.btn.frame.origin.y;

            CGFloat cgW=self.btn.frame.size.width;

            CGFloat cgH=self.btn.frame.size.height;

            self.btn.frame=CGRectMake(cgX-(cgX*0.5), cgY-(cgY*0.5), cgW+(cgW*0.5), cgH+(cgH*0.5));

            self.alpahaBtn.alpha=;

        }];

    }else{

        [self alpahaBtnTypeClick];

    }

}

@end