Swift实现弹出菜单

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var sp1Btn:UIButton? = nil;


    var customTimer: Timer? = nil;


    var testArray:NSMutableArray = NSMutableArray(capacity: 0)

    override func viewDidLoad() {

        super.viewDidLoad()



        let sp1Btn = UIButton(frame: CGRect(x: 260, y: 100, width: 38, height: 38))

        sp1Btn.setImage(UIImage(named: "sp1"), for: UIControlState.normal)

        sp1Btn.addTarget(self, action:#selector(btnClick) , for: UIControlEvents.touchUpInside)



        self.sp1Btn = sp1Btn;

        let array = ["好友","远见","举报"];



        for i in 0 ..< 3
        {
            let customeBtn: CustomButton = CustomButton(frame: CGRect(x: 260, y: 100, width: 38, height: 38));

            customeBtn.setBackgroundImage(UIImage(named: "sp11"), for: UIControlState.normal)

            customeBtn.setTitle(array[i], for: UIControlState.normal)

            customeBtn.titleLabel?.font = UIFont.systemFont(ofSize: 10)

            customeBtn.setTitleColor(UIColor.white, for: UIControlState.normal)



            self.view.addSubview(customeBtn);


            customeBtn.startPoint = CGPoint(x: 278.5 , y: 118.5);

            let point_x:CGFloat = (CGFloat)(20*i);

             let point_y:CGFloat = (CGFloat)(50*i);


            customeBtn.nearPoint = CGPoint(x: (sp1Btn.frame.origin.x-90 + point_x ) , y: sp1Btn.frame.origin.y-40+point_y)

              customeBtn.endPoint = CGPoint(x: (sp1Btn.frame.origin.x-90 + point_x) , y: sp1Btn.frame.origin.y-40+point_y)




            testArray.add(customeBtn)
       }


         self.view.addSubview(sp1Btn)
    }


    func btnClick()
    {
        var systemSoundID:SystemSoundID = 0;

        self.sp1Btn?.isSelected = !(self.sp1Btn?.isSelected)!;


        let path = Bundle.main.path(forResource: "composer_close", ofType: "wav")

        AudioServicesCreateSystemSoundID(NSURL.fileURL(withPath: path!) as CFURL, &systemSoundID)


        AudioServicesPlayAlertSound(SystemSoundID(systemSoundID))



        var i = 0;

        var timer = Timer.scheduledTimer(withTimeInterval: 0.1, repeats: true) { (parttimer) in

            i+=1;

            print("结果",i)



            if i==3 {

                parttimer.invalidate();
            }

            let btn1:CustomButton = self.testArray[i-1] as! CustomButton;

            if (self.sp1Btn?.isSelected)!
            {

                let rotationAnimation = CAKeyframeAnimation(keyPath: "transform.rotation.z");

                rotationAnimation.values = [NSNumber(value: 0.0),NSNumber(value: M_PI*2),NSNumber(value: 0)];

                rotationAnimation.duration = 0.5;

                rotationAnimation.keyTimes = [NSNumber(value: 0),NSNumber(value: 4),NSNumber(value: 5)];


                let position = CAKeyframeAnimation(keyPath: "position")

                position.duration = 0.5;

                let mutablePath = CGMutablePath();

                mutablePath.move(to: btn1.startPoint!)

                mutablePath.addLine(to: btn1.nearPoint!)

                mutablePath.addLine(to: btn1.endPoint!);

                position.path = mutablePath;



                let animationGroup = CAAnimationGroup()

                animationGroup.animations = [position,rotationAnimation];

                animationGroup.duration = 0.5;

                //            animationGroup.isRemovedOnCompletion = false;

                animationGroup.fillMode = kCAFillModeForwards;

                animationGroup.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseIn)

                btn1.layer.add(animationGroup, forKey: nil);

                btn1.center = btn1.endPoint!;


            }else{


                let rotationAnimation = CAKeyframeAnimation(keyPath: "transform.rotation.z");

                rotationAnimation.values = [NSNumber(value: 0.0),NSNumber(value: M_PI*2),NSNumber(value: 0)];

                rotationAnimation.duration = 0.5;

                rotationAnimation.keyTimes = [NSNumber(value: 0),NSNumber(value: 4),NSNumber(value: 5)];


                let position = CAKeyframeAnimation(keyPath: "position")

                position.duration = 0.5;

                let mutablePath = CGMutablePath();

                mutablePath.move(to: btn1.endPoint!)

                mutablePath.addLine(to: btn1.nearPoint!)

                mutablePath.addLine(to: btn1.startPoint!);

                position.path = mutablePath;



                let animationGroup = CAAnimationGroup()

                animationGroup.animations = [position,rotationAnimation];

                animationGroup.duration = 0.5;

                //            animationGroup.isRemovedOnCompletion = false;

                animationGroup.fillMode = kCAFillModeForwards;

                animationGroup.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseIn)

                btn1.layer.add(animationGroup, forKey: nil);

                btn1.center = btn1.startPoint!;

            }




        }

        RunLoop.current.add(timer, forMode: RunLoopMode.commonModes)

        timer.fire()






        let animation : CABasicAnimation = CABasicAnimation(keyPath: "transform.rotation")

        animation.duration = 0.2;


        if (self.sp1Btn?.isSelected)!
        {
          animation.fromValue = 0;

          animation.toValue = -45;

        } else
        {
            animation.fromValue = -45;

            animation.toValue = 0;
        }


        animation.isRemovedOnCompletion = false;

        animation.fillMode = kCAFillModeForwards;


        self.sp1Btn?.layer.add(animation, forKey: nil);

    }

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