IOS报摊后台疑难解答

我正在启动一个报摊应用程序，首先我要测试所有的框架，看看谁在工作。我已经在前台下载了一个由通知触发的问题。但我不知道如何在后台下载，或者至少我错过了一些东西。。。以下是我添加到plist的内容：

该应用程序是针对IOS 5的。。。这是我的密码。。。当然，我还实现了

NKAssetDownload

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    if ([launchOptions objectForKey:UIApplicationLaunchOptionsNewsstandDownloadsKey] || [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey]) {
        NKLibrary *nkLib = [NKLibrary sharedLibrary];
        for(NKAssetDownload *asset in [nkLib downloadingAssets]) {
            [asset downloadWithDelegate:self];
        }
    }else{
        [[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge |
                                                                               UIRemoteNotificationTypeSound |
                                                                               UIRemoteNotificationTypeAlert |
                                                                               UIRemoteNotificationTypeNewsstandContentAvailability
                                                                               )];
    }
    [[NSUserDefaults standardUserDefaults]setBool: YES forKey:@"NKDontThrottleNewsstandContentNotifications"];
    [[NSUserDefaults standardUserDefaults] synchronize];
    return YES;
}

-(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo{
NSLog(@"didReceiveRemoteNotification");
if (userInfo) {
    NKIssue *issue4 = [[NKLibrary sharedLibrary] issueWithName:@"01_Primera"];
    if (!issue4) {
        issue4= [[NKLibrary sharedLibrary] addIssueWithName:@"01_Primera" date:[NSDate date]];
    }
    if([issue4 status]==NKIssueContentStatusNone) {
        NSURL *downloadURL = [NSURL URLWithString:@"http://www.viggiosoft.com/media/data/blog/newsstand/magazine-4.pdf"];
        NSURLRequest *req = [NSURLRequest requestWithURL:downloadURL];
        NKAssetDownload *assetDownload = [issue4 addAssetWithRequest:req];
        [assetDownload downloadWithDelegate:self];
    }
}

}

我遗漏了什么，我还有额外的不必要的代码吗？请帮忙。

• 如果您正在测试用一个内容可用的通知唤醒应用程序（在刷走它之后）：iOS7上的1，那么它有一个bug:。 如果您有一台尚未更新的设备要测试，它应该可以在iOS 5-6上运行

• 您还需要Info.plist中的密钥：

• 最后，在您的代码中，我认为您应该在didFinishLaunchingWithOptions中进行一些更改：

  if ([launchOptions objectForKey:UIApplicationLaunchOptionsNewsstandDownloadsKey] || [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey]) {        
       [self handleNotification:launchOptions];        
  }
  
  //...other code...
  
  //This code can be the same as with didReceiveRemoveNotification
  
  -(void) handleNotification:(NSDictionary*)userInfo{
  
      //check userInfo for "content-available" key
      //if there is content-available:1 check for an issue_id/content_id in the rest of the notification payload (userInfo), and download the issue
  
  }
  

---

我已经有了所需的背景模式-报摊内容，我的代码已经是这样了。我尝试打开应用程序，然后单击主页按钮，然后发送警报。我收到警报，但下载未启动。我尝试了ios7.0.4和5.1.1，结果仍然相同。它在前台工作，当我在锁屏上滑动通知HUD打开应用程序时也可以。还可能是什么，请帮帮我，我终于明白了！我还需要所需的后台模式-应用程序下载内容以响应推送通知