从UIWebView中删除渐变背景？ [英] Remove gradient background from UIWebView?

问题描述

如何从UIWebView中删除渐变 - 如果您过度滚动顶部或底部，则会看到该渐变。
此代码

How do remove the gradient from a UIWebView - the one that you see if you overscroll the top or bottom. This code

webView.backgroundColor = [UIColor whiteColor];

只是改变渐变的颜色，它不会删除它。如何做到这一点？

just changes the color of the gradient, it doesn't removes it. How can this be done?

（注意：与 UIWebView底层）

推荐答案

啊哈，是的术语失败了。我根本不会称它为阴影，但是我可以说。这是我的类型安全代码，以实现这种效果。总结一下：这将隐藏滚动视图的任何图像视图子项。它不像（objectAtIndex：0）方法那样容易改变，所以如果Apple重新订购webView控件的子节点它会正常工作，但仍然依赖于通过图像视图应用渐变效果的事实。视图（并且确实存在支持Web视图的scrollview）。

Aha, yes terminology fail. I wouldn't call that a shadow at all, but c'est la vie. Here is my type-safe code to achieve the effect. To summarise: this will hide any image-view children of the scroll view. It's not as vulnerable to change as the (objectAtIndex:0) methods, so if Apple re-order the children of the webView control it will work fine, but still relies on the fact that the gradient effect is applied by imageviews parented to the scroll view (and that there is indeed a scrollview underpinning the web view).

{
    webView.backgroundColor = [UIColor whiteColor];
    for (UIView* subView in [webView subviews])
    {
        if ([subView isKindOfClass:[UIScrollView class]]) {
            for (UIView* shadowView in [subView subviews])
            {
                if ([shadowView isKindOfClass:[UIImageView class]]) {
                    [shadowView setHidden:YES];
                }
            }
        }
    }
}

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