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  • iOS webview自适应实际内容高度的4种方法

    方法1:获取webview中scrovllview的contentsize进行设置

    -(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

    -(void)webViewDidFinishLoad:(UIWebView *)webView{
        
        CGFloat webViewHeight = [[webView stringByEvaluatingJavaScriptFromString:@"document.body.offsetHeight"] 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

    -(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

    -(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
                }
            }
        }
    }
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  • 原文地址:https://www.cnblogs.com/anyezhuixing/p/4866937.html
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