UIWebView in Swift: exc_bad_access

Question

我的Swift应用程序与UIWebView崩溃与exc_bad_access当试图获得当前URL。它也只在某些情况下崩溃(通常取决于用户在UIWebView中执行的操作)。尝试加载代码中提供的url，然后点击取消。如果我不实现UIWebViewDelegate协议的方法，它永远不会崩溃。

class AuthViewController: UIViewController, UIWebViewDelegate {
@IBOutlet var authWebView: UIWebView
init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: NSBundle?) {
    super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
    // Custom initialisation
}
override func viewDidLoad() {
    super.viewDidLoad()
    self.authWebView.delegate = self
    var url = NSURL(string:"http://oauth.vk.com/authorize?client_id=4423823&scope=audio&display=mobile&v=5.21")
    var urlRequest = NSMutableURLRequest(URL: url)
    self.authWebView.loadRequest(urlRequest)
}
override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func webViewDidFinishLoad(webView:UIWebView) {
    NSLog( webView.request!.URL!.absoluteString )
}
}

我也试图实现这个方法来检查请求对象是否存在之前获得URL，但它没有帮助。

    func webView(webView: UIWebView!,
    shouldStartLoadWithRequest request: NSURLRequest!,
    navigationType navigationType: UIWebViewNavigationType) -> Bool {
        if !self.authWebView.request {
            return false
        } else {
            return true
        }
}

Answer 1

我发现了错误:

部分URL包含特殊字符，如%@或#，用于在NSLog中格式化。如果在NSLog的第一个参数字符串中使用了这些字符中的任何一个，则需要更多的参数来格式化。

如

NSLog("http://someurl.com/") // this is fine (no special chars used)
NSLog("http://someurl.com/#somehash?x=%@") // this is not fine (%@ is used in URL, NSLog thinks that I'm formatting the string
var someURLString = "http://someurl.com/#somehash?x=%@"
NSLog("%@", someURLString) // this is fine and the way it has to be done

谢谢大家看我的问题!