可拖动的Button

来源：互联网发布：流量测试软件编辑：程序博客网时间：2024/06/06 10:02

根据拖动手势实时位置实现可拖动的Button

直接上代码:

/// 可以随意拖动位置的按钮组件class SGMoveButton: UIButton{    // MARK: - properties    var parentView:UIView?;        // MARK: - life cycle    override init(frame:CGRect)    {        super.init(frame:frame);                let recognizer:UIPanGestureRecognizer = UIPanGestureRecognizer(target: self, action: #selector(SGMoveButton.eventPanGestureRecognizerHandler(_:)));        self.addGestureRecognizer(recognizer);    }        required init?(coder aDecoder:NSCoder)    {        super.init(coder:aDecoder);    }        deinit    {    }        // MARK: - public methods        // MARK: - event response    internal func eventPanGestureRecognizerHandler(_ sender:UIPanGestureRecognizer)    {        if (sender.state == UIGestureRecognizerState.changed)        {            let currentPoint:CGPoint = sender.translation(in: self.parentView);// 获得pan手势相对于parentView移动的CGPoint            self.center = CGPoint(x: self.center.x + currentPoint.x, y: self.center.y + currentPoint.y); // 按照上面相对移动的CGPoint改变button的CGPoint            sender.setTranslation(CGPoint.zero, in: self.parentView); // 将pan手势相对于parentView的CGPoint置零        }    }}

demo地址:https://github.com/songhaisheng/SGMoveButton

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