Set N seconds in ios and then execute a function.

Zookeeper

Run a function after setting N seconds. The most common task is to set a timer. If you have just seen such a function today, it is relatively simple and practical. Remember it first so that you do not forget it.

Run the pushSecondController function in 5 seconds.

[Self defined mselector: @ selector (pushSecondController) withObject: nil];

For example, if the first view appears, it will jump to the second view in 5 seconds. The Code is as follows:

- (void) pushSecondController{ 
SecondViewController *secondController = [[SecondViewController alloc] initWithNibName:nil bundle:NULL]; 
[self.navigationController pushViewController:secondController animated:YES]; 
} 
- (void) viewDidAppear:(BOOL)paramAnimated{ 
[super viewDidAppear:paramAnimated]; 
[self performSelector:@selector(pushSecondController) withObject:nil afterDelay:5.0f]; 
}

5 seconds later, jump back to the first page

- (void) goBack{ 
[self.navigationController popViewControllerAnimated:YES]; 
}
- (void) viewDidAppear:(BOOL)paramAnimated{ 
[super viewDidAppear:paramAnimated]; 
[self performSelector:@selector(goBack) withObject:nil afterDelay:5.0f]; 
}