Question

我看到这种情况出现在单页上,他们基本上在国歌网中的形象。观点,然后,当你掌握自己给你带来的形象时,你可以pin。我的问题基本上在于如何像他们一样创造悲观,他们似乎在国歌上的形象。观点ated淡。如果你有一张照片,就试图通过纸板进入你的面板,打上图像,你看着我所说的话。下面是初步和最后意见的简介:

enter image description here

Usually in a web view those image are stored as links and some downloading needs to be performed to extract that image and add a gesture recognizer to it. How do they do it so fast?

Answer 1

The part of the UI you are talking about (the top with the image) is not a UIWebView. It is there own custom UIView of some sort showing a teaser of the content. The bottom faded out part is a UIWebView of the original article.

I imagine the way the implemented it would be to have a tap gesture recognizer on the image and when the tap occurs animating the scaled down version of the image to the full size of the screen.

处理主食的守则可能照此办理(非常简单):

-(void)_imageTapOccured:(UITapGestureRecognizer *)gesture {
    [UIView animateWithDuration:2.0 animations:^{
        imageView.frame = CGRectMake(0.0f, 0.0f, widthOfScreen, heightOfScreen);
    }];
}

Then they will also likely handle the tap to change the picture back to the original size:

-(void)_imageTapAtFullScreen:(UITapGestureRecognizer *)gesture {
    [UIView animateWithDuration:2.0 animations:^{
        imageView.frame = originalRectSize;
    }];
}

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