Question

I have a variable called touchStatus that tracks the touch status in the program. The variable gets set to B in the touchesBegan method, E in touchesEnded and to M in touchesMoved.

However, my requirements are a little different. I was requested to program in a way so that there is one second of delay between the finger being lift off from the screen and touchStatus getting set to E. If the user touches the screen before the one second elapses, touchStatus should continue to be M or B (whatever it was before the one second).

How can I accomplish this?

Answer 1

You can use

[self performSelector:@selector(setEndedValue:) withObject:self afterDelay:1.0];

Create a BOOL to monitor whether the value should be set such as:

BOOL hasTouchRestarted = NO;

If the screen is touched again before the value is set, change the value to YES and return from the setEndedValue method.

-(void)setEndedValue {
    if ( hasTouchRestarted ) { return; }
   // set value
    self.touchStatus = E;
}