iOS 點擊圖片 或按鈕 查看大圖

 

//這是按鈕的  要是imageview  改下uIimage對象便可

+ (void)showImage:(UIButton*)avatarImageView

{

    UIImage *image =avatarImageView.currentBackgroundImage;

    // 得到根窗口

    UIWindow *window =[UIApplication sharedApplication].keyWindow;

    UIView *backgroundView =[[UIView alloc]initWithFrame:CGRectMake(0, 0, KWidth, KHeight)];

    //將rect由rect所在視圖轉換到目標視圖view中，返回在目標視圖view中的rect

    oldframe =[avatarImageView convertRect:avatarImageView.bounds toView:window];

    backgroundView.backgroundColor =[UIColor blackColor];

    backgroundView.alpha =0.5;

    UIImageView *imageView =[[UIImageView alloc]initWithFrame:oldframe];

    imageView.image =image;

    imageView.tag =1;

    [backgroundView addSubview:imageView];

    [window addSubview:backgroundView];

    //點擊圖片縮小的手勢

    UITapGestureRecognizer *tap =[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(hideImage:)];

    [backgroundView addGestureRecognizer:tap];

    [UIView animateWithDuration:0.3 animations:^{

        imageView.frame =CGRectMake(0,([UIScreen mainScreen].bounds.size.height-image.size.height*[UIScreen mainScreen].bounds.size.width/image.size.width)/2, [UIScreen mainScreen].bounds.size.width, image.size.height*[UIScreen mainScreen].bounds.size.width/image.size.width);

        backgroundView.alpha =1;

    }];

}

+ (void)hideImage:(UITapGestureRecognizer *)tap{

    UIView *backgroundView =tap.view;

    UIImageView *imageView =(UIImageView *)[tap.view viewWithTag:1];

    [UIView animateWithDuration:0.3 animations:^{

        imageView.frame =oldframe;

        backgroundView.alpha =0;

    } completion:^(BOOL finished) {

        [backgroundView removeFromSuperview];

    }];

}