didFinishLaunchingWithOptions没有找到任何rootcontroller

Question

我需要解析一些触发NSURLConnection的XML。解析完成后，我收到一些数据，然后设置根视图控制器。我的问题是application：didFinishLaunchingWithOptions：在composeRootController方法之前返回，并且因为应用程序找不到任何根视图控制器而发生错误。我怎么能等到composeRootController返回？

我的代码如下：

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

这里实现了xmlConnect函数来解析

- (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];
}

这里composeRootController设置rootcontroller

Answer 1

点亮你的

 [self composeRootController];

内部      didFinishLaunching ...

让composeRootController调用xmlConnect。

您可能必须将xmlConnect方法移出应用代理。