1.共享倒计时结束后自动消失。iOS12及以下。[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(getSysBroadcastPickerStandaloneViewController:)name:@"ShowRPBroadcastPickerStandaloneViewControllerNofi"object:nil];//实现监听方法-(void)getSysBroadcastPickerStandaloneViewController:(NSNotification*)notificatio
