我无法捕获WKWebView的屏幕截图 [英] I can't capture the screenshot of a WKWebView

问题描述

我正在尝试捕获WKWebView的屏幕截图但是我的方法无法正常工作，它返回一个纯色，好像图层树是空的，而它似乎适用于其他视图。

I'm trying to capture a screenshot of a WKWebView but my method doesn't work properly, it returns a solid color as if the layer tree was empty, while it seems to work on other views.

- (UIImage *)screenshot
{
    UIImage *screenshot;

    UIGraphicsBeginImageContext(self.frame.size);

    [self.layer renderInContext:UIGraphicsGetCurrentContext()];

    screenshot = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return screenshot;
}

推荐答案

这Stackoverflow答案在iOS 8上使用WKWebView解决了这个问题，其中 [查看snapshotViewAfterScreenUpdates：] 和 [view.layer renderInContext：] 返回纯黑色或白色：

This Stackoverflow answer solved it for me on iOS 8 with a WKWebView where [view snapshotViewAfterScreenUpdates:] and [view.layer renderInContext:] either returned solid black or white:

UIGraphicsBeginImageContextWithOptions(view.bounds.size, YES, 0);
[view drawViewHierarchyInRect:view.bounds afterScreenUpdates:YES];
UIImage* uiImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

这篇关于我无法捕获WKWebView的屏幕截图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！