应用崩溃尝试在iOS 7中加载网络视图

时间:2016-05-13 08:51:35

标签: ios swift webview

我正在使用swift 2.2并开发了一个具有表格视图的应用程序。在一个特定的行上点击,我正在加载一个Web视图..一切看起来都很完美,并且在iOS 9上运行的ipad上运行完美。当我尝试加载相同的应用程序并尝试在iOS 7设备上加载Web视图时,应用程序崩溃。代码是

class AppCatalogViewController: UIViewController , UIWebViewDelegate {

var alertView = UIAlertView()

override func viewDidLoad() {
    super.viewDidLoad()
    NSLog("enetered the webView view controller")
    self.title = NSLocalizedString("mdm.agent.common.appCatalog", comment : "")
    self.view.autoresizesSubviews = true
    alertView = UIAlertView(title: NSLocalizedString("mdm.agent.common.loadingData", comment: ""), message: "", delegate: nil, cancelButtonTitle: nil, otherButtonTitles: "")
    let actInd : UIActivityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.WhiteLarge)
    actInd.startAnimating()
   actInd.frame = CGRectMake(125, 60, 37, 37)
    alertView.addSubview(actInd)
    //Change self.view.bounds to a smaller CGRect if you don't want it to take up the whole screen
    NSLog("setting the frame of the webview")
    let webView : UIWebView = UIWebView(frame: self.view.bounds)

    webView.autoresizingMask = UIViewAutoresizing.FlexibleWidth
    webView.scalesPageToFit = true
    webView.autoresizesSubviews = true
    webView.delegate = self



    let persist = Persistence()
    let url : String = "https://\(persist.getObject(mdmiosagent_Constants.SERVERNAMEKEY)):\(persist.getObject(mdmiosagent_Constants.SERVERPORTKEY))/showAppsList.mobapps?udid=\(persist.getObject(mdmiosagent_Constants.UDIDKEY))&isNativeAgent=true&authtoken=\(defaults.authToken)&SCOPE=\(defaults.scope)"

    let request : NSMutableURLRequest = NSMutableURLRequest(URL: NSURL(string: url)!)
    request.timeoutInterval = 10
    var userAgent : String = ""
    if(UIDevice.currentDevice().userInterfaceIdiom == UIUserInterfaceIdiom.Phone) {
        userAgent = "iPhone"
    } else {
        userAgent = "iPad"
    }

    request.setValue(userAgent, forHTTPHeaderField: "User-Agent")

    webView.loadRequest(request)

    self.view.addSubview(webView)
    alertView.show()

}

func webViewDidStartLoad(webView: UIWebView) {

}
func webViewDidFinishLoad(webView: UIWebView) {

    alertView.dismissWithClickedButtonIndex(-1, animated: true)
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func showError(error : NSString) {
    let alert : UIAlertView = UIAlertView(title: NSLocalizedString("mdm.agent.common.error", comment: ""), message: error as String, delegate: nil, cancelButtonTitle: "mdm.agent.common.okay", otherButtonTitles: "", "")
    alert.show()
}
// method to check authentication
func connection(connection: NSURLConnection, didReceiveAuthenticationChallenge challenge: NSURLAuthenticationChallenge) {

    if (challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust) {
        challenge.sender!.useCredential(NSURLCredential(forTrust: (challenge.protectionSpace.serverTrust!)), forAuthenticationChallenge: challenge)
    }
    challenge.sender?.continueWithoutCredentialForAuthenticationChallenge(challenge)
}

这在iOS 9设备上运行良好..而且iOS 7设备日志中显示的错误是

May 13 12:58:38 iPhone mdm.ios[1040] <Error>: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSArrayM insertObject:atIndex:]: object cannot be nil'
*** First throw call stack:
(0x2fc3bf83 0x3a3ecccf 0x2fb75f0d 0x328f21af 0x328f2f75 0x328f352b 0xdcd84 0xdce24 0x3245d4ab 0x3245d269 0x325e936b 0x32506d63 0x32506b6d 0x32506b05 0x32458d59 0x320d662b 0x320d1e3b 0x320d1ccd 0x320d16df 0x320d14ef 0x320cb21d 0x2fc07255 0x2fc04bf9 0x2fc04f3b 0x2fb6febf 0x2fb6fca3 0x34a75663 0x324bc14d 0xc1318 0x3a8f9ab7). 

任何人都可以找出原因吗?

1 个答案:

答案 0 :(得分:0)

我试过你的代码,效果很好。 例外情况说:

  

[__ NSArrayM insertObject:atIndex:]:object不能为nil'

可能是因为你试图本地化一个字符串,例如你的文件Localizable.strings已经存在但尚未本地化。

当您的应用程序的旧版本已启动到您的iOS7设备或模拟器设备,并且您重新运行新版本但这个未本地化的文件仍驻留在应用程序包中的资源文件夹中时,会发生这种情况。

当您构建运行时,新版本的应用程序未使用的文件将不会被删除,因此最好的方法是从模拟器或真实设备中完全删除应用程序,清除缓存并再次构建运行。

此外,正如您通过评论解释的那样,通过应用目录的更新情况会导致此类崩溃。避免此类事情的最佳方法是在保留或保护条件下保护您的本地化。

从iOS 7开始,我相信你可以创建UTF-8而不是UTF-16的字符串文件。

来自official Apple doc

  

注意:建议您使用UTF-8保存字符串文件   encoding,这是标准字符串文件的默认编码。   Xcode自动将字符串文件从UTF-8转码为UTF-16   他们被复制到产品中。有关的更多信息   标准字符串文件格式,请参阅创建字符串资源文件。对于   有关Unicode及其文本编码的更多信息,请转到   http://www.unicode.org/http://en.wikipedia.org/wiki/Unicode