当应用程序在后台且未连接到Xcode时，不会调用didReceiveRemoteNotification：fetchCompletionHandler

可用于获取远程通知的代码，在后台模式下启用远程通知功能，并且我也启用了后台获取（我不知道是否有必要），我使用以下代码：

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult result))handler{
DLog(@"899- didReceiveRemoteNotification userInfo: %@",userInfo);
NSDictionary *custom=userInfo[@"custom"];
if(custom){
    NSInteger code = [custom[@"code"] integerValue];
    NSInteger info = [custom[@"info"] integerValue];

    NSDictionary *messageInfo = userInfo[@"aps"];

    [[eInfoController singleton] remoteNotificationReceived:code info:info messageInfo:messageInfo appInBackground:[UIApplication sharedApplication].applicationState==UIApplicationStateBackground];

    handler(UIBackgroundFetchResultNewData);
}
}

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo{
DLog(@"899- didReceiveRemoteNotification userInfo: %@",userInfo);
NSDictionary *custom=userInfo[@"custom"];
if(custom){
    NSInteger code = [custom[@"code"] integerValue];
    NSInteger info = [custom[@"info"] integerValue];

    NSDictionary *messageInfo = userInfo[@"aps"];

    [[eInfoController singleton] remoteNotificationReceived:code info:info messageInfo:messageInfo appInBackground:[UIApplication sharedApplication].applicationState==UIApplicationStateBackground];

}
}

- (void)application:(UIApplication*)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData*)deviceToken
{
//NSLog(@"My token is: %@", deviceToken);
const unsigned *tokenBytes = (const unsigned *)[deviceToken bytes];
NSString *hexToken = [NSString stringWithFormat:@"%08x%08x%08x%08x%08x%08x%08x%08x",
                      ntohl(tokenBytes[0]), ntohl(tokenBytes[1]), ntohl(tokenBytes[2]),
                      ntohl(tokenBytes[3]), ntohl(tokenBytes[4]), ntohl(tokenBytes[5]),
                      ntohl(tokenBytes[6]), ntohl(tokenBytes[7])];

[[eInfoController singleton] setPushNotificationToken:hexToken];
}

- (void)application:(UIApplication*)application didFailToRegisterForRemoteNotificationsWithError:(NSError*)error
{
NSLog(@"Failed to get token, error: %@", error);
}

在后台存储通知的代码，对我来说，关键是启动后台下载任务以允许我下载信息以进行存储，然后在应用程序变为活动方法时触发我检查是否存储了丢失的通知展示它。

-(void)remoteNotificationReceived:(NSInteger)code info:(NSInteger)info messageInfo:(NSDictionary*)messageInfo appInBackground:(BOOL)appInBackground{

DLog(@"Notification received appInBackground: %d,pushCode: %ld, messageInfo: %@",appInBackground, (long)code,messageInfo);

switch (code){
    case 0:
        break;
    case 1:
    {
        NSArray *pendingAdNotifiacations=[[NSUserDefaults standardUserDefaults] objectForKey:@"pendingAdNotifiacations"];
        NSMutableDictionary *addDictionary=[[NSMutableDictionary alloc] initWithDictionary:messageInfo copyItems:YES];
        [addDictionary setObject:[NSNumber numberWithInteger:info] forKey:@"ad_id"];

        if(!pendingAdNotifiacations){
            pendingAdNotifiacations=[NSArray arrayWithObject:addDictionary];
        }else{
            pendingAdNotifiacations=[pendingAdNotifiacations arrayByAddingObject:addDictionary];
        }
        [addDictionary release];

        [[NSUserDefaults standardUserDefaults] setObject:pendingAdNotifiacations forKey:@"pendingAdNotifiacations"];
        [[NSUserDefaults standardUserDefaults] synchronize];
        DLog(@"pendingAdNotifiacations received: %@.",pendingAdNotifiacations);
        [[UIApplication sharedApplication] setApplicationIconBadgeNumber:(pendingAdNotifiacations)?[pendingAdNotifiacations count]:0];
        DLog(@"783- pendingAdNotifiacations: %lu.",(unsigned long)((pendingAdNotifiacations)?[pendingAdNotifiacations count]:0));
        if(appInBackground){

            [AdManager requestAndStoreAd:info];
        }else{
            [AdManager requestAndShowAd:info];
        }
    }
        break;
    default:
        break;
}

}

这是使用后台任务在后台下载信息的相关代码：

-(void)requestAdinBackgroundMode:(NSInteger)adId{
DLog(@"744- requestAdinBackgroundMode begin");
if(_backgroundTask==UIBackgroundTaskInvalid){
    DLog(@"744- requestAdinBackgroundMode begin dispatcher");
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    DLog(@"744- passed dispatcher");
    [self beginBackgroundUpdateTask];

    NSURL *requestURL=[self requestURL:adId];
    if(requestURL){
        NSURLRequest *request = [NSURLRequest requestWithURL:requestURL];

        NSURLResponse * response = nil;
        NSError  * error = nil;
        DLog(@"744- NSURLConnection url: %@",requestURL);
        NSData * responseData = [NSURLConnection sendSynchronousRequest: request returningResponse: &response error: &error];

        if(NSClassFromString(@"NSJSONSerialization"))
        {
            NSError *error = nil;
            id responseObject = [NSJSONSerialization
                     JSONObjectWithData:responseData
                     options:0
                     error:&error];

            if(error) {
                NSLog(@"JSON reading error: %@.",[error localizedDescription]);
                /* JSON was malformed, act appropriately here */ }
            else{

            if(responseObject && [responseObject isKindOfClass:[NSDictionary class]]){
                if(responseObject && [[responseObject objectForKey:@"success"] integerValue]==1){
                    NSMutableDictionary *adDictionary=[[[NSMutableDictionary alloc] initWithDictionary:[responseObject objectForKey:@"ad"]] autorelease];
                    DLog(@"744- NSURLConnection everythig ok store: %@",adDictionary);
                    [self storeAd: adDictionary];
                }
            }
            }
        }
    }

    // Do something with the result

    [self endBackgroundUpdateTask];
});
}
} 

- (void) beginBackgroundUpdateTask
{
DLog(@"744- requestAdinBackgroundMode begin");
_backgroundTask = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
    [self endBackgroundUpdateTask];
}];
}

- (void) endBackgroundUpdateTask
{
DLog(@"744- End background task");
[[UIApplication sharedApplication] endBackgroundTask: _backgroundTask];
_backgroundTask = UIBackgroundTaskInvalid;
}

好吧，这就是我想的全部，我发布它是因为有人要求我发布更新，希望它可以对某人有所帮助...