註冊蘋果推送通知異步或在後臺

Question

在我的應用程序我使用推送通知，在我看來，註冊推送請求需要一段時間，這阻止我的應用程序立即顯示內容，只顯示一個黑色的屏幕，直到設備令牌回來。

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 
{ 
    .... 

    NSLog(@"Registering for push notifications...");  
    [[UIApplication sharedApplication] 
    registerForRemoteNotificationTypes: 
    (UIRemoteNotificationTypeAlert | 
     UIRemoteNotificationTypeBadge | 
     UIRemoteNotificationTypeSound)]; 

    .... 

    return self; 
} 

我怎樣才能做到這一點asynchrounus或在後臺..因爲它，如果屏幕保持黑色混淆用戶...

問候

更新：根據要求我的代碼

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 

    self.webViewCon = [[[WebViewController alloc] initWithNibName:@"WebView_iPhone" bundle:[NSBundle mainBundle]] autorelease]; 

    application.applicationIconBadgeNumber = 0; 
    [window addSubview:[webViewCon view]]; 
    [self.window makeKeyAndVisible]; 

    // register for push 
    NSLog(@"Registering for push notifications...");  
    [[UIApplication sharedApplication] 
    registerForRemoteNotificationTypes: 
    (UIRemoteNotificationTypeAlert | 
     UIRemoteNotificationTypeBadge | 
     UIRemoteNotificationTypeSound)]; 

    return YES; 
} 

然後在didRegisterForRemoteNotificationsWithDeviceToken

- (void)application:(UIApplication *)app didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken { 
    NSString *str = [NSString stringWithFormat:@"Device Token=%@",deviceToken]; 
    NSLog(@"%@",str); 

    // get token & udidi 
    NSString* newToken = [deviceToken description]; 
    newToken = [newToken stringByTrimmingCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"<>"]]; 
    newToken = [newToken stringByReplacingOccurrencesOfString:@" " withString:@""]; 
    NSString *udid = [UIDevice currentDevice].uniqueIdentifier; 

    // send request to server to save token 
    NSString *urlString = [NSString stringWithFormat:@"https://my.server.com/service/token?token=%@&udid=%@",newToken, udid]; 

    NSURL *url = [[NSURL alloc] initWithString:urlString]; 

    NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url]; 
    [url release]; 

    NSURLResponse *response; 
    [NSURLConnection sendSynchronousRequest:urlRequest returningResponse:&response error:nil]; 
} 

，並在我的WebViewController.m

- (void)viewDidLoad 
{ 
    // create and send POST request 
    NSURL *url = [NSURL URLWithString:myUrlAddress]; 
    NSString *udid = [UIDevice currentDevice].uniqueIdentifier; 
    NSString *requestString = [NSString stringWithFormat:@"udid=%@", udid]; 
    NSData *requestData = [NSData dataWithBytes: [requestString UTF8String] length: [requestString length]]; 
    NSMutableURLRequest *requestObj = [[NSMutableURLRequest alloc] initWithURL:url]; 
    [requestObj setHTTPMethod:@"POST"]; 
    [requestObj setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"content-type"]; 
    [requestObj setHTTPBody: requestData]; 
    NSURLResponse *response; 
    NSError *err; 
    [NSURLConnection sendSynchronousRequest: requestObj returningResponse:&response error:&err]; 

    // set delegate 
    webView.delegate = self; 

    // set backgroundcolor 
    [webView setOpaque:NO]; 
    [webView setBackgroundColor:RGB(154, 148, 131)]; 

    // check internet and load 
    NetworkStatus currentStatus = [[Reachability reachabilityForInternetConnection] 
           currentReachabilityStatus]; 
    if(currentStatus != NotReachable) { 
     //Load the request in the UIWebView. 
     [webView loadRequest:requestObj]; 
    } 
    else { 
     UIAlertView *alert = [[UIAlertView alloc] 
          initWithTitle:@"No Connection" 
          message:@"Check your Wi-Fi connection and restart the App." 
          delegate:self 
          cancelButtonTitle:nil 
          otherButtonTitles:@"Ok", nil]; 
     [alert show]; 
     [alert release]; 
    } 
    // prevent scrolling up & down 
    [[[webView subviews] lastObject] setScrollEnabled:NO]; 

    [super viewDidLoad]; 
} 

希望幫助...也可以Reachabilit是什麼問題？

親切的問候閱讀

Answer 1

據developer.apple.com，registerForRemoteNotificationTypes是異步的：

When you send this message, the device initiates the registration process with Apple Push Service. If it succeeds, the application delegate receives a device token in the application:didRegisterForRemoteNotificationsWithDeviceToken: method; if registration doesn’t succeed, the delegate is informed via the application:didFailToRegisterForRemoteNotificationsWithError: method.

可能是你做的不便耗時在委託的回調？

Answer 2

將您的代碼-(BOOL)application:didFinishLaunchingWithOptions:，它應該工作的罰款。

Answer 3

註冊在AppDelegate中- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions通知和

嘗試實施這些方法，

// one of these will be called after calling -registerForRemoteNotifications 
- (void)application:(UIApplication *)application 
didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken 
- (void)application:(UIApplication *)application 
didFailToRegisterForRemoteNotificationsWithError:(NSError *)error 
- (void)application:(UIApplication *)application didReceiveRemoteNotification: 
(NSDictionary *)userInfo