ios7如何在后台运行进程

问题描述

我想在前台和后台连续运行我的进程.我已经实现了以下代码

I want to run my process in fore ground and background continuously.I've implemented the following code

self.updateTimer = [NSTimer scheduledTimerWithTimeInterval:10.0
                                                    target:self
                                                  selector:@selector(repeatedMethod)
                                                  userInfo:nil
                                                   repeats:YES];

self.backgroundTask = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
    NSLog(@"Background handler called. Not running background tasks anymore.");
    [[UIApplication sharedApplication] endBackgroundTask:self.backgroundTask];
    self.backgroundTask = UIBackgroundTaskInvalid;
}];

在前台很好，但在后台进程只运行了 5 分钟，并且运行时间不超过 5 分钟.但我希望它即使在后台也能连续运行.请帮助.

In foreground it is fine but in background process is running for just 5 mins and not running more than that.But I want it to run continuously even in background also.please help.

推荐答案

发生这种情况，因为完成处理程序在 5 分钟后被调用.在使用 UIBackgroundModes 这也是依赖的如果您在应用程序中使用它，则必须提供 BackgroundMode 的功能，否则苹果将拒绝它.

Thats happening, because the completionHandler is called after 5 mins.You cannot run a background process for indefinite period in iOS until you use one of the UIBackgroundModes and that too is dependent upon you must provide a functionality of BackgroundMode if you use it in your application otherwise apple will reject it.

例如，如果您使用VoiP"BackgroundMode，您的应用程序应提供VoiP 服务"，否则将被拒绝

For example if you use "VoiP" BackgroundMode you application should provide "VoiP services" otherwise it will be rejected

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