iOS 监听app从后台恢复到前台
2017-04-28 本文已影响0人
yangyuxiaozi
- APPDelegate中的代理方法可以监听到程序前后台切换的状态
- (void)applicationDidEnterBackground:(UIApplication * )application
{
NSLog(@"---applicationDidEnterBackground----")
// 进入后台
}
- (void)applicationDidBecomeActive:(UIApplication * )application
{
NSLog(@"---applicationDidBecomeActive----")
// 进入前台
}
- (void)applicationDidEnterBackground:(UIApplication *)application
{
NSLog(@"---applicationDidEnterBackground----")
// 进入后台
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
NSLog(@"---applicationDidBecomeActive----")
// 进入前台
}
- 单个ViewController通过在ViewDidLoad里注册筛选器通知来监听，在dealloc中移除通知
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(someMethod1:)
name:UIApplicationDidBecomeActiveNotificationobject:nil];
