在倾斜时动画UIView

Question

我正在尝试根据iPhone的倾斜度来设置Mapview（Mapbox）的动画效果。当角度大于45度时，MapView应设置为以底部为中心的圆形动画，当角度低于45度时，MapView应展开以填充整个屏幕。

我正在使用带约束的动画。动画无法正常运行：Gif of the Animation

这是我使用的代码：

if value > 45 {
        UIView.animate(withDuration: 1.0, animations: {
            self.mapView.frame = CGRect(x: self.mapViewInitialX, y: self.mapViewInitialY, width: 200, height: 200)
            self.mapviewBottomConstraint.constant = 15
            self.mapViewWidthConstraint.constant = 200
            self.mapViewHeightConstraint.constant = 200
            self.mapView.layer.cornerRadius = 100
            self.mapView.layoutIfNeeded()
        })
    } else {
        UIView.animate(withDuration: 1.0, animations: {
            self.mapView.frame = CGRect(x: 0, y: 0, width: (self.mapView.superview?.bounds.width)!, height: (self.mapView.superview?.bounds.height)!)
            self.mapviewBottomConstraint.constant = 0
            self.mapViewWidthConstraint.constant = (self.mapView.superview?.bounds.width)!
            self.mapViewHeightConstraint.constant = (self.mapView.superview?.bounds.height)!
            self.mapView.layer.cornerRadius = 0
            self.mapView.layoutIfNeeded()
        })
    }