Make a timer link to a action - objective-c

Question

I have the code to make it so a notification pops up when I press a button. I want it so it appears when 10 seconds is up.
I know i need to do this:
(NSTimer *)scheduledTimerWithTimeInterval:(NSTimeInterval)seconds invocation:
(NSInvocation *)invocation repeats:(BOOL)repeats
My action is:
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"UIAlertView"
message:[NSString stringWithFormat:#"%d", hi]
delegate:hi
cancelButtonTitle:#"Ok"
otherButtonTitles: nil];
[alert show];
}

Answer 1

You can just do:
[self performSelector:#selector(actionMethodName) withObject:nil afterDelay:10];
If you replace actionMethodName with the true method name.
If you want to use the timer route (which is perfectly valid too) it's easier to use scheduledTimerWithTimeInterval:target:selector:userInfo:repeats: than to create an invocation. If you do this, keep a reference to the timer and invalidate it when you're done.
Based on the updated question details, using a timer and invalidating it is becoming a more preferable method, cancelling perform selector is doable but it isn't as clear as the timer route. I'll show the code for the perform selector route anyway:
- (void)startEverything
{
[self performSelector:#selector(showAlert) withObject:nil afterDelay:10];
}
- (void)handleButtonTap:(id)sender
{
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:#selector(showAlert) object:nil];
}
- (void)showAlert
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"UIAlertView"
message:[NSString stringWithFormat:#"%d", hi]
delegate:nil
cancelButtonTitle:#"Ok"
otherButtonTitles:nil];
[alert show];
}
Using timers would have the same method structure, but would require a #property to store the timer and instead of cancelPreviousPerformRequestsWithTarget... you would [self.timer invalidate]; self.timer = nil;.

Answer 2

try this:
-(IBAction)btnDoneClick:(id)sender {
[NSTimer scheduledTimerWithTimeInterval:10.0 target:self selector:#selector(buttonactionalert) userInfo:nil repeats:NO];
}
-(void) buttonactionalert {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"UIAlertView"
message:[NSString stringWithFormat:#"%d", hi]
delegate:hi
cancelButtonTitle:#"Ok"
otherButtonTitles: nil];
[alert show];
}

Answer 3

I would personally just use performSelector:withObject:afterDelay: It would look something like this:
// Action on button press
- (IBAction)myActionButtonPress:(id)sender {
// setup the selector to fire in 10 seconds
[self performSelector:#selector(showAlert) withObject:nil afterDelay:10.0];
}
// the selector to be called
- (void)showAlert {
// display alert
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"UIAlertView"
message:#"This alert displayed 10 seconds after button press"
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[alert show];
}
this would activate your action method after 10 seconds.