ios - 如果app在终止期间发送http请求，服务器会收到吗？

我想知道，如果我的 iOS 应用程序正在终止，如果我发送 HTTP 请求通知服务器用户下线，服务器会收到此请求吗？

我的代码如下:

- (void)applicationWillTerminateUIApplication *)application {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
    NSMutableDictionary *para = [[NSMutableDictionary alloc]initWithCapacity:0];
    [para setObject:[[NSUserDefaults standardUserDefaults] valueForKey"UserBindId"] forKey"unionId"];
    [para setObject(0) forKey"OnlineState"];
    [Post updateOnlineWithParameters:para withBlock:^(NSDictionary *commitResult, NSError *error) {
        NSLog(@"applicationWillTerminate = %@", commitResult);
    }];
}

---

Best Answer-推荐答案

见 Executing Finite-Length Tasks例如，当应用进入后台模式时，如何让应用请求一点额外时间(最多 3 分钟，这对于您的目的应该绰绰有余)。

- (void)applicationDidEnterBackgroundUIApplication *)application
{
    bgTask = [application beginBackgroundTaskWithName"GoingOffline" expirationHandler:^{
        // Well, we ran out of time before network request finished ... handle that however you want

        // but tell the OS that we understand, and that the background task is done

        [application endBackgroundTask:bgTask];
        bgTask = UIBackgroundTaskInvalid;
    }];

    NSDictionary *para = @{@"unionID"     : [[NSUserDefaults standardUserDefaults] valueForKey"UserBindId"],
                           @"OnlineState" : @0};

    [Post updateOnlineWithParameters:para withBlock:^(NSDictionary *commitResult, NSError *error) {
        // when done, tell the OS that the background task is done

        [application endBackgroundTask:bgTask];
        bgTask = UIBackgroundTaskInvalid;
    }];
}

我尝试稍微简化您的参数(不需要可变字典......您可以使用字典文字)，因此请根据您的需要进行调整。但希望你能按照这里的基本思路，如果你想在应用进入后台时做某事，你必须请求权限。

关于ios - 如果app在终止期间发送http请求，服务器会收到吗？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31420556/