后台刷新时未拉出Jawbone移动

Question

我已经使用https://github.com/Jawbone/UPPlatform_iOS_SDK有一段时间了，并获得了用户的日常步骤。

我想在应用程序处于后台状态时从Jawbone API中提取数据。我遵循这个教程：http://www.devfright.com/ios-7-background-app-refresh-tutorial/来调用这个方法：

[UPMoveAPI getMovesWithLimit:10U completion:^(NSArray *moves, UPURLResponse *response, NSError *error) {
    NSLog(@"This is not getting executed in background");
}];

jawbone会话已成功验证，并且我的会话似乎处于活动状态。但是我没有得到响应，上面的NSLog也不会在后台执行。我已经联系过Jawbone支持，他们似乎没有回复。

任何有同样经历的人，请帮助。

Answer 1

尝试下面的代码选项：

选项-1\f25-1\f6

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
   [UPMoveAPI getMovesWithLimit:10U completion:^(NSArray *moves, UPURLResponse *response, NSError *error) {
       NSLog(@"This is not getting executed in background");
   }];
}

选项-2\f25 https://developer.apple.com/library/ios/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/BackgroundExecution/BackgroundExecution.html -2\f6

bgTask = [application beginBackgroundTaskWithName:@"MyTask" expirationHandler:^{
        // Clean up any unfinished task business by marking where you
        // stopped or ending the task outright.
        [application endBackgroundTask:bgTask];
        bgTask = UIBackgroundTaskInvalid;
    }];

    // Start the long-running task and return immediately.
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

        // Do the work associated with the task, preferably in chunks.

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

另请注意，您需要在info.plist中添加UIBackgroundModes

希望这能有所帮助。