有的时候会碰见类似的苦逼需求， webview自适应实际内容高度 下面有四种方法供使用
方法1：获取webview中scrovllview的contentsize进行设置
| 123456 | -(void)webViewDidFinishLoad:(UIWebView *)webView{ CGFloat webViewHeight=[webView.scrollView contentSize].height; CGRect newFrame = webView.frame; newFrame.size.height = webViewHeight; webView.frame = newFrame;} |
方法2：执行js语句 直接获取html文档的dom高度
| 1234567 | -(void)webViewDidFinishLoad:(UIWebView *)webView{ CGFloat webViewHeight= [[webView stringByEvaluatingJavaScriptFromString: @”document.body.offsetHeight”]floatValue];// CGFloat webViewHeight= [[webView stringByEvaluatingJavaScriptFromString: @”document.body.scrollHeight”]floatValue]; CGRect newFrame = webView.frame; newFrame.size.height = webViewHeight; webView.frame = newFrame;} |
方法3.先将UIWebView的高度设为最小，然后再使用sizeThatFits就会返回刚好合适的大小
| 123456 | -(void)webViewDidFinishLoad:(UIWebView *)webView{ CGSize actualSize = [webView sizeThatFits:CGSizeZero]; CGRect newFrame = webView.frame; newFrame.size.height = actualSize.height; webView.frame = newFrame;} |
方法4.遍历webview子视图 获取UIWebDocumentView高度即实际高度
| 12345678910111213141516 | -(void)webViewDidFinishLoad:(UIWebView *)webView{ CGFloat webViewHeight = 0.0f; if ([webView.subviews count] > 0) { UIView *scrollerView = webView.subviews[0]; if ([scrollerView.subviews count] > 0) { UIView *webDocView = scrollerView.subviews.lastObject; if ([webDocView isKindOfClass:[NSClassFromString(@”UIWebDocumentView”) class]]) { webViewHeight = webDocView.frame.size.height;//获取文档的高度 webView.frame= webDocView.frame; //更新UIWebView 的高度 } } }} |
