ios - 自动调整 UIWebView 的大小以适应内容

Question

我实际上正在开发一个 iOS 应用程序，它必须显示从服务器下载的 HTML 代码。

我的 View 由分组 TableView 组成，每个部分有一个单元格，该单元格仅由必须显示 HTML 代码的 UIWebView 组成。

我不希望 UIWebView 可以向上/向下滚动，我只想允许向右/向左滚动，我希望将其设置为其内容的高度。

我阅读了很多有关此问题的主题，但任何解决方案对我来说都是完全有效的。

对我来说奇怪的是，对于某些单元格，我得到了正确的高度并且设置正确，但并非每个单元格都如此......

这是我尝试过的代码(仍然编写了几个测试):

func webViewDidFinishLoad(webView: UIWebView) {
    webView.scrollView.scrollEnabled = false

    let size = self.sizeThatFits(CGSizeMake(self.frame.width, CGFloat(FLT_MAX)))
    self.frame = CGRectMake(0, 0, self.frame.width, size.height);

    let test1 = webView.stringByEvaluatingJavaScriptFromString("document.body.offsetHeight;")
    let test2 = webView.stringByEvaluatingJavaScriptFromString("document.body.scrollHeight;")
    let test3 =  webView.stringByEvaluatingJavaScriptFromString("document.documentElement.scrollHeight;")

    let height = CGFloat(Double(test2!)!)

    if(self.containingVC is InfoDrugViewController){
        let VC = self.containingVC as! InfoDrugViewController
        VC.heightReady(height, index: self.index.section)
    }else{ if (self.containingVC is InfoProtocolViewController){
        let VC = self.containingVC as! InfoProtocolViewController
        VC.heightReady(height, index: self.index.section)
        }
    }

}

如果有人知道如何始终获得正确的高度，那就完美了!

(请注意，HTML 代码是从服务器下载的，并由网站上的 WYSIWYG (CKEditor) 文本字段生成。)

Answer 1

它找到了一个可行的解决方案，也许它不是最干净的，但至少它有效:

func webViewDidFinishLoad(webView: UIWebView) {
    webView.scrollView.scrollEnabled = false
    var frame = self.frame
    frame.size.width = self.containingVC.view.frame.size.width
    frame.size.height = 1
    self.frame = frame
    frame.size.height = self.scrollView.contentSize.height
    self.frame = frame

    let test0 = self.scrollView.contentSize.height

    let size = self.sizeThatFits(CGSizeMake(self.frame.width, CGFloat(FLT_MAX)))
    self.frame = CGRectMake(0, 0, self.frame.width, size.height);

    let test1 = CGFloat(Double(webView.stringByEvaluatingJavaScriptFromString("document.body.offsetHeight;")!)!)
    let test2 = CGFloat(Double(webView.stringByEvaluatingJavaScriptFromString("document.body.scrollHeight;")!)!)
    let test3 = CGFloat(Double(webView.stringByEvaluatingJavaScriptFromString("document.body.clientHeight")!)!)
    let test4 = CGFloat(Double(webView.stringByEvaluatingJavaScriptFromString("document.documentElement.scrollHeight;")!)!)
    let test5 = CGFloat(Double(webView.stringByEvaluatingJavaScriptFromString("document.documentElement.clientHeight")!)!)
    let test6 = CGFloat(Double(webView.stringByEvaluatingJavaScriptFromString("document.documentElement.offsetHeight")!)!)

    print("0: \(test0) | 1: \(test1) | 2: \(test2) | 3: \(test3) | 4: \(test4) | 5: \(test5) | 6: \(test6)")


    let height = max(test0, test1, test2, test3, test4, test5, test6)

    if(self.containingVC is InfoDrugViewController){
        let VC = self.containingVC as! InfoDrugViewController
        VC.heightReady(height, index: self.index.section)
    }else{ if (self.containingVC is InfoProtocolViewController){
        let VC = self.containingVC as! InfoProtocolViewController
        VC.heightReady(height, index: self.index.section)
        }
    }
    self.scrollView.scrollEnabled = true

}