#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=174;CGFloat imgH=272;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=174;CGFloat imgH=272;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==0) {//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=1;}];}else{[self alpahaBtnTypeClick];}
}
@end