使用'document.body.scrollHeight;'计算UIWebView内容的动态高度.在iOS 10中返回更大的价值 [英] Calculate UIWebView Content dynamic Height using 'document.body.scrollHeight;' returns bigger value in iOS 10
问题描述
我正在使用Objective C在应用程序上创建，我在其中使用 UIWebView 以HTML格式显示内容.我在 UIWebView 委托方法 webViewDidFinishLoad
I am creating on an application using Objective C, where I'm using a UIWebView to display contents in HTML format. I am using below code in UIWebView delegate method webViewDidFinishLoad
NSUInteger contentHeight = [[aWebView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.body.scrollHeight;"]] intValue];
NSUInteger contentHeight = [[aWebView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"document.body.scrollHeight;"]] intValue];
计算webview内容的高度，这在 iOS8 ， iOS9 和 iOS11 中工作正常，但在 iOS10 中运行正常> iPhone移动的内容高度返回的值比实际内容值大得多.因此，我在屏幕上的Webview底部获得了一些额外的空白.
to calculate the webview content height, this is working fine in iOS8, iOS9 and iOS11 but in iOS10 iPhone mobiles the content height returning a much bigger value than the actual content value. Because of this, I am getting some extra white space in bottom of my webview in screen.
我尝试了所有解决方案，但仅在iOS 10中得到了相同的错误内容高度.请帮助我解决此问题.预先谢谢您！
I tried all the solutions but getting the same wrong content height only in iOS 10. Please help me to resolve this problem. Thank You in Advance!
推荐答案
我使用以下方法获取contentSize.
I had used following way to get contentSize.
我在Webview的滚动视图中添加了观察者(KVO).
i have added observer(KVO) on webview's scrollview.
self.webView.scrollView.addObserver(self, forKeyPath: "contentSize", options: .new, context: nil);
现在，每当改变Webview的contentsize时，我都会通过这种方法获得回调
Now, whenever contentsize of webview will get changed, i get callback in this method
override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
}
现在从此方法中获取对象的contentSize并使用它.
Now take the contentSize of object from this method and use that.
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