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以查看谁都能正常工作。 在前台时，我已经下载了由通知触发的问题。 但是我不知道如何在后台下载，或者至少我缺少一些东西...这是我添加到plist的内容：

该应用程序是针对IOS 5 ...这里是我的代码...我当然也实施了三个URLConection方法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];
    }
}

}

我缺少什么，还有其他多余的代码吗？ 请帮忙。

Answer 1

• 如果您正在尝试在iOS7上通过内容为available：1的通知唤醒应用程序（将其刷掉后），则它存在一个错误： 请在此处 和此处 阅读 （使用您的dev帐户登录） 。 如果您要测试的设备尚未更新，则它应该可以在iOS 5-6上运行。

• 您还需要在Info.plist中输入一个密钥： 所需的后台模式-报亭内容

• 最后，在代码中，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 }