didFinishLaunchingWithOptions找不到任何根控制器

Question

我需要解析一些觸發NSURLConnection的XML。解析完成後，我收到一些數據，然後設置根視圖控制器。我的問題是應用程序：didFinishLaunchingWithOptions：在composeRootController方法之前返回並且因爲應用程序找不到任何根視圖控制器而發生錯誤。我怎麼才能等到composeRootController返回？

我的代碼如下：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{ 
    [self xmlConnect]; 
    return YES; 
} 

這裏xmlConnect功能解析

- (void)connectionDidFinishLoading:(NSURLConnection *)connection 
{ 
    //convertim la data a string 
    NSString *receivedDataAsString = [[NSString alloc] initWithData:receivedData encoding:NSUTF8StringEncoding]; 
    NSLog(@"connectionDidFinishLoading %@", receivedDataAsString); 

    //xml parsing 
    xmlParser = [[NSXMLParser alloc] initWithData:receivedData]; 
    [xmlParser setDelegate:self]; 

    self.receivedData = nil; 

    BOOL success = [xmlParser parse]; 

    if(success) 
     NSLog(@"No Errors"); 
    else 
     NSLog(@"Error Error Error!!!"); 

    [self composeRootController]; 
} 

這裏composeRootController設置rootcontroller

Answer 1

把你

[self composeRootController]; 

實施10

裏面 didFinishLaunching ...

並且有composeRootController調用xmlConnect。

您可能需要將xmlConnect方法移出應用程序委託。