Question

我正在尝试在我的应用中创建一个功能，以便当用户点按图片时，图像会显示为＃34;全屏＆＃34;。点击时的行为应该是将现有图片移动到全屏宽度，以便不会丢失任何图像。我的代码当前移动图像占据手机的高度，因此裁剪宽度。

- (void)viewDidLoad
{
isFullScreen = FALSE;
tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(imgToFullScreen:)];
tap.delegate = self;



_imageView.contentMode = UIViewContentModeScaleAspectFill;
[_imageView setClipsToBounds:YES];
_imageView.userInteractionEnabled = YES;
_imageView.image = [UIImage imageNamed:@"mac4.png"];

UITapGestureRecognizer *tapper = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(imgToFullScreen:)];
tapper.numberOfTapsRequired = 1;

[_imageView addGestureRecognizer:tapper];

[self.view addSubview:_imageView];
}

-(void)imgToFullScreen:(UITapGestureRecognizer*)sender {
if (!isFullScreen) {
    [UIView animateWithDuration:0.5 delay:0 options:0 animations:^{
        //save previous frame
        prevFrame = _imageView.frame;
        [_imageView setFrame:[[UIScreen mainScreen] bounds]];
    }completion:^(BOOL finished){
        isFullScreen = TRUE;
    }];
    return;
}
else{
    [UIView animateWithDuration:0.5 delay:0 options:0 animations:^{
        [_imageView setFrame:prevFrame];
    }completion:^(BOOL finished){
        isFullScreen = FALSE;
    }];
    return;
}
}

我做错了什么？我知道以下代码行不允许用户像Facebook一样全屏查看图像：

[_imageView setFrame:[[UIScreen mainScreen] bounds]];

所以基本上，当用户点击图像时，我希望全屏查看图像，同时确保没有图像丢失。 Facebook是我努力寻求的完美典范。

Answer 1

您需要使用UIViewContentModeScaleAspectFit代替UIViewContentModeScaleAspectFill。 AspectFill将尝试用图像填充整个imageView，但AspectFit将确保整个图像适合imageView。

像Facebook一样查看图像全屏

1 个答案: