iphone - オブジェクトを垂直方向にドラッグ

Question

私はこのオブジェクトを水平方向ではなく垂直方向にドラッグするのが好きです。

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [[event allTouches] anyObject];
    CGPoint location = [touch locationInView:touch.view];
    if (CGRectContainsPoint(myObject.frame, location)){
    CGPoint xLocation = CGPointMake(location.x, myObject.center.y);
    myObject.center = xLocation;
    }
}

Answer 1

CGPoint yLocation = CGPointMake(myObject.center.x, location.y);
myObject.center = yLocation;