我创建了一个实现NSURLProtocol的类,它将告诉我UIWebView请求。我希望告诉用户界面我们点击了一个感兴趣的URL并在ViewController上运行代码以访问WebView。
我相信协议是解决方案,但似乎无法理解如何让它工作。任何建议和代码示例将非常感激。这是我到目前为止所尝试的内容。
UI视图Controller.swift
class WebViewController: UIViewController,WebAuthDelegate {
@IBOutlet weak var webView: UIWebView!
override func viewDidLoad() {
super.viewDidLoad()
let url = NSURL(string: "http://example.com")
let request = NSURLRequest(URL: url!)
webView.loadRequest(request)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAction func onBackClick(sender: AnyObject) {
if(webView.canGoBack){
webView.goBack()
}
}
@IBAction func onFwdClick(sender: AnyObject) {
if(webView.canGoForward){
webView.goForward()
}
}
@IBAction func onRefresh(sender: AnyObject) {
webView.reload()
}
func getUserToken() {
print("RUN THIS AFTER I HIT URL IN URL PROTOCAL CLASS")
}
}
这是我的NSURLProtocol实现的类以及尝试的协议(请告诉我它是否是错误的方法)
class CUrlProtocol: NSURLProtocol {
//let delegate: WebAuthDelegate? = nil
override class func canInitWithRequest(request: NSURLRequest) -> Bool {
print("URL = \(request.URL!.absoluteString)")
if request.URL!.absoluteString == "http://api-dev.site.com/token" {
//Tell the UI That we now have the info and we can access the UIWebView Object
}
return false
}
}
protocol WebAuthDelegate{
func getUserToken()
}
答案 0 :(得分:0)
实现此目标的最佳方法可能是在匹配网址时从协议发布NSNotification
。
在CUrlProtocol
中,当您找到匹配项时(您可以选择通知名称):
let notification:NSNotification = NSNotification(name: "MyURLMatchedNotification", object: nil)
NSNotificationCenter.defaultCenter().postNotification(notification)
在WebViewController
:
// During init (or viewDidAppear, if you only want to do it while its on screen)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "getUserToken", name: "MyURLMatchedNotification", object: nil)
...
// During dealloc (or viewWillDisappear)
NSNotificationCenter.defaultCenter().removeObserver(self, name: "MyURLMatchedNotification", object: nil)
如果您需要来自该请求的信息,您还可以传递包含通知的内容。只需在创建通知时设置object
参数,然后将getUserToken
更改为接受类型为NSNotification
的单个参数并访问其object
属性。