UIScrollview получать события прикосновения
Как я могу обнаружить точки соприкосновения в своей UIScrollView
? Методы делегата касания не работают.
3 ответа:
настройка распознавателя жестов крана:
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(singleTapGestureCaptured:)]; [scrollView addGestureRecognizer:singleTap];
и вы получите штрихи в:
- (void)singleTapGestureCaptured:(UITapGestureRecognizer *)gesture { CGPoint touchPoint=[gesture locationInView:scrollView]; }
вы можете создать свой собственный подкласс UIScrollview, а затем вы можете реализовать следующее:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { NSLog(@"DEBUG: Touches began" ); UITouch *touch = [[event allTouches] anyObject]; [super touchesBegan:touches withEvent:event]; } - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event { NSLog(@"DEBUG: Touches cancelled"); // Will be called if something happens - like the phone rings UITouch *touch = [[event allTouches] anyObject]; [super touchesCancelled:touches withEvent:event]; } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { NSLog(@"DEBUG: Touches moved" ); UITouch *touch = [[event allTouches] anyObject]; [super touchesMoved:touches withEvent:event]; } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { NSLog(@"DEBUG: Touches ending" ); //Get all the touches. NSSet *allTouches = [event allTouches]; //Number of touches on the screen switch ([allTouches count]) { case 1: { //Get the first touch. UITouch *touch = [[allTouches allObjects] objectAtIndex:0]; switch([touch tapCount]) { case 1://Single tap break; case 2://Double tap. break; } } break; } [super touchesEnded:touches withEvent:event]; }