Swift简单View缩放动画

    // 先直接贴代码，迟点整理下233333
    // 给动画的
    // 给动画的
    // 给动画的
    @IBOutlet weak var threeBtnView: UIView!
    @IBOutlet weak var searchView: UIView!
    @IBOutlet weak var grayView: UIView!
    @IBOutlet weak var forMapView: UIView!
    var zoomedInSearchView:Bool = true
    var searchViewOriginalHeight:CGFloat!
    var grayViewOriginalHeight:CGFloat!
    @IBOutlet weak var searchHeightCon: NSLayoutConstraint!
    
    @IBOutlet weak var grayViewHeightCon: NSLayoutConstraint!
    
    
    @IBAction func zoomSearchView(_ sender: Any){
        searchView.clipsToBounds = true
        if zoomedInSearchView {
            UIView.animate(withDuration: 0.3, delay: 0, options: UIViewAnimationOptions.curveEaseIn, animations: {
                self.searchHeightCon.constant = self.searchHeightCon.constant * 0.5
                self.searchView.bounds = CGRect(x: 0, y: self.searchViewOriginalHeight*0.5, width: self.searchView.bounds.width, height: self.searchView.bounds.height)
                // self.searchView.frame = CGRect(x: 0, y: self.searchView.frame.minY, width: self.searchView.bounds.width, height: self.searchViewOriginalHeight*0.5)
                // self.grayView.frame = CGRect(x: self.grayView.frame.minX, y: self.grayView.frame.minY, width: self.grayView.frame.width, height: self.grayViewOriginalHeight)
                self.view.layoutIfNeeded()
                self._mapView.frame = CGRect(x: 0, y: 0, width: self.forMapView.frame.width, height: self.forMapView.frame.height)
                self.view.layoutIfNeeded()
            }, completion: nil)
            zoomedInSearchView = false
        }
        else{
            UIView.animate(withDuration: 0.3, delay: 0, options: UIViewAnimationOptions.curveEaseIn, animations: {
                self.searchHeightCon.constant = self.searchHeightCon.constant*2
                self.searchView.bounds = CGRect(x: 0, y: 0, width: self.searchView.bounds.width, height: self.searchView.bounds.height)
                // self.grayView.frame = CGRect(x: self.grayView.frame.minX, y: self.grayView.frame.minY, width: self.grayView.frame.width, height: self.grayViewOriginalHeight)
                // self._mapView.frame = CGRect(x: 0, y: self.grayView.frame.maxY+10, width: self.view.frame.width, height: self.view.frame.height - (self.grayView.frame.maxY+10) - 49 - 10)
                self.view.layoutIfNeeded()
                self._mapView.frame = CGRect(x: 0, y: 0, width: self.forMapView.frame.width, height: self.forMapView.frame.height)
                self.view.layoutIfNeeded()
            }, completion: nil)
            zoomedInSearchView = true
        }
    }
    var grayViewZoomed:Bool = true
    @IBAction func grayViewZoom(_ sender: Any) {
        grayView.clipsToBounds = true
        if grayViewZoomed {
            UIView.animate(withDuration: 0.3, delay: 0, options: UIViewAnimationOptions.curveEaseOut, animations: {
                self.grayViewHeightCon.constant = self.grayViewHeightCon.constant * 0.3
                self.grayView.bounds = CGRect(x: 0, y: self.grayViewOriginalHeight*(1-0.3), width: self.grayView.bounds.width , height: self.grayViewOriginalHeight)
                // self.grayView.frame = CGRect(x: self.grayView.frame.minX, y: self.grayView.frame.minY, width: self.grayView.frame.width, height: self.grayView.frame.height*0.3)
                // self._mapView.frame = CGRect(x: 0, y: self.grayView.frame.maxY+10, width: self.view.frame.width, height: self.view.frame.height - (self.grayView.frame.maxY+10) - 49 - 10)
                self.view.layoutIfNeeded()
                self._mapView.frame = CGRect(x: 0, y: 0, width: self.forMapView.frame.width, height: self.forMapView.frame.height)
                self.view.layoutIfNeeded()
            }, completion: nil)
            grayViewZoomed = false
        }
        else{
            UIView.animate(withDuration: 0.3, delay: 0, options: UIViewAnimationOptions.curveEaseIn, animations: {
                self.grayViewHeightCon.constant = self.grayViewHeightCon.constant * (1.000/0.3)
                // self.grayView.frame = CGRect(x: self.grayView.frame.minX, y: self.grayView.frame.minY, width: self.grayView.frame.width, height: self.grayViewOriginalHeight)
                self.grayView.bounds = CGRect(x: 0, y: 0, width: self.grayView.bounds.width, height: self.grayViewOriginalHeight)
                // self.grayView.frame = CGRect(x: self.grayView.frame.minX, y: self.grayView.frame.minY, width: self.grayView.frame.width, height: self.grayViewOriginalHeight)
                // self._mapView.frame = CGRect(x: 0, y: self.grayView.frame.maxY+10, width: self.view.frame.width, height: self.view.frame.height - (self.grayView.frame.maxY+10) - 49 - 10)
                self.view.layoutIfNeeded()
                self._mapView.frame = CGRect(x: 0, y: 0, width: self.forMapView.frame.width, height: self.forMapView.frame.height)
                self.view.layoutIfNeeded()
            }, completion: nil)
            grayViewZoomed = true
        }
        
    }
    // 给动画的
    // 给动画的
    // 给动画的