[[Programming]] [[ここ:http://ameblo.jp/xcc/day-20090326.html]]がとても参考になる. また以下は[[ここ:http://d.hatena.ne.jp/Chabashira/20080322/1206175764]]からの引用. - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event; - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event; - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event; - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { // We only support single touches, so get the touch from allTouches UITouch *touch = [[event allTouches] anyObject]; // Only move the placard view if the touch was in the placard view if ([touch view] != placardView) { // In case of a double tap outside the placard view, update the placard's display string if ([touch tapCount] == 2) { [placardView setupNextDisplayString]; } return; } // Animate the first touch CGPoint touchPoint = [self convertPoint:[touch locationInView] fromView:placardView]; [self animateFirstTouchAtPoint:touchPoint]; } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [[event allTouches] anyObject]; // If the touch was in the placardView, move the placardView to its location if ([touch view] == placardView) { CGPoint location = [touch locationInView]; location = [self convertPoint:location fromView:placardView]; placardView.center = location; return; } } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [[event allTouches] anyObject]; // If the touch was in the placardView, bounce it back to the center if ([touch view] == placardView) { // Disable user interaction so subsequent touches don't interfere with animation self.userInteractionEnabled = NO; [self animatePlacardViewToCenter]; return; } }