我想使用拖动在我的应用程序中移动 UIButton。UIButton 是使用代码创建的。我怎样才能做到这一点?
问问题
514 次
3 回答
5
您可以通过以下方式实现此目的:
你可以使用touchesMoved
手势或使用UIPanGestureRecognizer
1)使用touchesMoved:
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInView:self];
placardView.center = location;
return;
}
2)使用 UIPanGestureRecognizer
将手势识别器添加到按钮上viewDidLoad
,如下所示:
UIPanGestureRecognizer *objGesture= [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(moveButton:)];
[myButton addGestureRecognizer:objGesture];
[objGesture release];
编写要调用的目标方法
-(void)moveButton:(UIPanGestureRecognizer *)recognizer
{
if (recognizer.state == UIGestureRecognizerStateChanged ||
recognizer.state == UIGestureRecognizerStateEnded) {
UIView *draggedButton = recognizer.view;
CGPoint translation = [recognizer translationInView:self.view];
CGRect newButtonFrame = draggedButton.frame;
newButtonFrame.origin.x += translation.x;
newButtonFrame.origin.y += translation.y;
draggedButton.frame = newButtonFrame;
[recognizer setTranslation:CGPointZero inView:self.view];
}
}
于 2013-03-11T09:16:26.330 回答
0
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
CGPoint pt = [[touches anyObject] locationInView:self];
button.center = pt;
}
于 2013-03-11T08:50:44.803 回答
0
尝试使用panGestureRecognizer
或通过使用touches
方法。单击此处获取更多参考。
于 2013-03-11T09:04:12.663 回答