我在WKWebView
单元格中使用了Tableview
,它的height
并没有根据webView中的内容而变化。
如果我直接在Webview中加载htmlString
,则即使调用updateCellHeight()
,单元格的高度也不会改变。
这是我的自定义单元(urlString
来自API调用响应,因此每次都会不同):
let cell1: NewCatDescrDCell = tableView.dequeueReusableCell(withIdentifier: "cellID", for: indexPath) as! NewCatDescrDCell
if !loaded {
cell1.urlString = "<p>Headers and Builders</p>"
cell1.configure()
cell1.tableView = tableView
}
loaded = true
return cell1
}
这是NewCatDescrDCell
单元格:
class NewCatDescrDCell: UITableViewCell, WKNavigationDelegate {
let webView = WKWebView()
var tableView: UITableView!
var heights : CGFloat = 1200.0
var heightconstraint: NSLayoutConstraint!
var urlString: String = ""
override func awakeFromNib() {
super.awakeFromNib()
webView.translatesAutoresizingMaskIntoConstraints = false
contentView.addSubview(webView)
webView.topAnchor.constraint(equalTo: contentView.topAnchor).isActive = true
webView.rightAnchor.constraint(equalTo: contentView.rightAnchor).isActive = true
webView.leftAnchor.constraint(equalTo: contentView.leftAnchor).isActive = true
webView.bottomAnchor.constraint(equalTo: contentView.bottomAnchor).isActive = true
webView.allowsBackForwardNavigationGestures = true
}
func configure() {
webView.navigationDelegate = self
webView.scrollView.isScrollEnabled = true
webView.loadHTMLString(urlString, baseURL: nil)
}
@objc func updateCellHeight() {
heights = webView.scrollView.contentSize.height
heightconstraint = webView.heightAnchor.constraint(equalToConstant: heights)
heightconstraint.isActive = true
tableView.reloadData()
}
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
Timer.scheduledTimer(timeInterval: 0.5, target: self, selector: #selector(updateCellHeight), userInfo: nil, repeats: false)
}
}
如果我使用height
来加载url
内的内容,WebView
会动态变化,但不适用于HTMLString
。
答案 0 :(得分:0)
我在Stackoverflow上发现了与WKWebView高度有关的类似问题。
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
self.webView.evaluateJavaScript("document.readyState", completionHandler: { (complete, error) in
if complete != nil {
self.webView.evaluateJavaScript("document.body.scrollHeight", completionHandler: { (height, error) in
self.containerHeight.constant = height as! CGFloat
})
}
})}
尝试此操作或在Stackoverflow上参考 How to determine the content size of a WKWebView?