CODEWITHSUNDEEP
ioscocoa-touchuikituser-interaction
Rafay
Rafay

Reputation: 99

How to detect user inactivity since last touch on a particular viewcontroller in iOS?

I need to perform a particular action in a view controller when user don't touch a particular screen for 3 seconds.

How can I do that in iOS?

Upvotes: 3

Views: 2695

Answers (2)

rebello95
rebello95

Reputation: 8576

  1. Add an NSTimer property/ivar to your view controller
  2. Add a tap gesture recognizer to the view you want to monitor (or use touchesBegan:)
  3. When the tap recognizer is hit, start the timer with an interval of 3.0s to call a function
  4. If tap recognizer is hit before the function the timer calls, invalidate the timer and set it to nil
  5. If the function that the timer was calling is hit, the user has been inactive for 3 seconds

Upvotes: 1

i_am_jorf
i_am_jorf

Reputation: 54640

Override the view's touches began method and reset a timer when you get touches.

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [self.timer invalidate];
    self.timer = [NSTimer scheduledTimerWithTimeInterval:3.0 target:self selector:@selector(inactivityTimerFired) userInfo:nil repeats:NO];

    [super touchesBegan:touches withEvent:event];
}

You could target the view controller instead of self if you need to.

Upvotes: 3

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