ios - how to call any method when user tocuhes any part of the screen in ipad -

i have ipad app in want if user touches part of screen should show alert. have studied method touch started , ended point how call method on touch if user touches screen.

you looking this:

uitapgesturerecognizer *singlefingertap =    [[uitapgesturerecognizer alloc] initwithtarget:self                                            action:@selector(handlesingletap:)]; [self.view addgesturerecognizer:singlefingertap];  //the event handling method - (void)handlesingletap:(uitapgesturerecognizer *)recognizer {   cgpoint location = [recognizer locationinview:[recognizer.view superview]];    //do stuff here... }