iOS 切后台挂机

具体实现:首先我们看看app进入后台进入前台的几个常用方法

#pragma mark - 程序将要进入后台(墓碑状态)

- (void)applicationWillResignActive:(UIApplication *)application { 

}

#pragma mark - 程序进入后台

- (void)applicationDidEnterBackground:(UIApplication *)application {

}

#pragma mark - 程序将要进入前台

- (void)applicationWillEnterForeground:(UIApplication *)application {

}

#pragma mark - 程序进入前台

- (void)applicationDidBecomeActive:(UIApplication *)application {

}