Find out UITextfield's end editing without resigning first responder

Question

When user is typing in UITextfield, and he stops for 2 seconds, the cursor is still on UITextfield, so how we can identify this event? i.e. I want to check the whether the editing is end or not without resigning the first responser from that UITextField. What is the way to do that?

Answer 1

Yes, we can check that! with UITextField delegate, - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string

- (void) callMeAfterTwoSeconds {
    NSLog(@"I'll call after two seconds of inactivity!");
}

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    [NSRunLoop cancelPreviousPerformRequestsWithTarget:self];
    [self performSelector:@selector(callMeAfterTwoSeconds) withObject:nil afterDelay:2.0];

    return YES;
}

While you're typing (tapping keys from keyboard), it will cancel previous calls for the callMeAfterTwoSeconds function, once you stop, it sets it to call after 2 seconds delay, and yes, it will call after 2 seconds.

Update: Even you can pass that textfield as object to performSelector to know which textfield is inactive, for that your callMeAfterTwoSeconds function will be like,

- (void) callMeAfterTwoSeconds:(UITextField *)textfield {
    if(textfield == txtUserName) {
        NSLog(@"User textfield has NO activity from last two seconds!"); }
}