IOS报亭后台故障排除

Question

我正在启动一个报亭应用程序，首先我正在测试所有框架，看看谁的一切都有效。我已经下载了在前台时由通知触发的问题。但我不知道如何在后台下载，或者至少我丢失了一些东西......这是我添加到 plist 的内容:

该应用程序针对 IOS 5...这是我的代码...当然我还实现了 NKAssetDownload 的三个 URLConection 方法

    - (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];
    }
}

}

我错过了什么，还有多余的不必要的代码吗？请帮忙。

Answer 1

• 如果您在 iOS7 上测试使用内容可用:1 通知唤醒应用程序(将其滑开后)，它有一个错误:read here and here (log in with your dev account) .如果您要测试的设备尚未更新，它应该可以在 iOS 5-6 上运行。

• 您还需要 Info.plist 中的 key :Required background modes - newsstand-content

• 最后，在您的代码中，我认为您应该对 didFinishLaunchingWithOptions 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
  
  }