iOS 如何知道用户退出App

代码如下:在AppDelegate进行操作:

1.

- (void)applicationDidEnterBackground:(UIApplication *)application {
    [[UIApplication sharedApplication]beginBackgroundTaskWithExpirationHandler:^(){
       }];
    NSLog(@"%s", __FUNCTION__);
}

2.

- (void)applicationWillTerminate:(UIApplication *)application {
    NSLog(@"%s", __FUNCTION__);
}

然后你将应用退出,进程结束,看打印台!