我想在WKWebView中获取tapped链接的url.链接采用自定义格式,可触发应用中的某些操作.例如HTTP：//我的网站/帮助#深层链接对讲.我这样使用KVO：
override func loadView() {
let webConfiguration = WKWebViewConfiguration()
webView = WKWebView(frame: .zero,configuration: webConfiguration)
webView.navigationDelegate = self
webView.addobserver(self,forKeyPath: "URL",options: .new,context: nil)
view = webView
}
override func observeValue(forKeyPath keyPath: String?,of object: Any?,change: [NSkeyvalueChangeKey : Any]?,context: UnsafeMutableRawPointer?) {
if let newValue = change?[.newKey] {
print("url changed: \(newValue)")
}
print("Did tap!!")
}
这在第一次点击链接时效果很好.但是,如果我连续两次点击相同的链接,它将不报告链接点击(显然因为实际值没有改变).是否有解决方法来解决这个问题,以便我可以检测每个点击并获取链接？任何关于这个的指针都会很棒！谢谢！
解决方法
像这样更改addobserver
webView.addobserver(self,options: [.new,.old],context: nil)
在observeValue函数中,您可以获得两个值
override func observeValue(forKeyPath keyPath: String?,context: UnsafeMutableRawPointer?) {
if let newValue = change?[.newKey] as? Int,let oldValue = change?[.oldKey] as? Int,newValue != oldValue {
//Value Changed
print(change?[.newKey])
}else{
//Value not Changed
print(change?[.oldKey])
}
}