在iOS 5上,UIWebView报告滚动视图的内容大小错误

j_m*_*lly 3 ios ios5

我尝试了一堆"解决方案"但是现在我试图找出UIWebView的scrollview的内容大小.它目前总是返回1024,这是设备的宽度.这是没有意义的,因为我正在查询高度,并且视图是纵向的.

以下代码报告高度为1024.00000

-(void)webViewDidFinishLoad:(UIWebView *)webView {

  float sourcesWebViewHeight = [[webView stringByEvaluatingJavaScriptFromString:@"document.documentElement.scrollHeight"] floatValue];

  NSLog(@"%f", sourcesWebViewHeight);

}
Run Code Online (Sandbox Code Playgroud)

但我只有几行文字.

j_m*_*lly 11

我会分解最终为我解决的问题.

我不得不把我的内容包装在里面.

<html><head><meta name=\"viewport\" content=\"initial-scale=1, user-scalable=no, width=device-width\" /></head><body>%@</body></html>
Run Code Online (Sandbox Code Playgroud)

实现以下视图确实加载.

-(void)webViewDidFinishLoad:(UIWebView *)webView {

  [self layoutSubviews];

  webView.scrollView.scrollEnabled = NO;    // Property available in iOS 5.0 and later
  CGRect frame = webView.frame;


  frame.size.height = 1;        // Set the height to a small one.

  webView.frame = frame;       // Set webView's Frame, forcing the Layout of its embedded scrollView with current Frame's constraints (Width set above).

  frame.size.height = webView.scrollView.contentSize.height;  // Get the corresponding height from the webView's embedded scrollView.

  webView.frame = frame;





}
Run Code Online (Sandbox Code Playgroud)

-(void) layoutSubviews {
  [super layoutSubviews];
  [body stringByEvaluatingJavaScriptFromString:
   [NSString stringWithFormat:
    @"document.querySelector('meta[name=viewport]').setAttribute('content', 'width=%d;', false); ",
    (int)body.frame.size.width]];
}
Run Code Online (Sandbox Code Playgroud)

最后我的webview做了所有正确的事情来扩展自己的内容.