如何在mmdrawercontroller中打开侧面菜单上调暗CenterController？

Question

我想在抽屉在MMDrawerController中打开时调暗中央控制器视图，而抽屉在逐渐关闭时（在子视图上增加alpha？）中央控制器。

Answer 1

在视觉状态块中添加带有alpha到中心视图控件的调光透视视图会产生这种效果。

let drawerController = DrawerController(centerViewController: nav, leftDrawerViewController: SideMenuTableViewController())

let blurView = UIView(frame: UIScreen.mainScreen().bounds)
    blurView.backgroundColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0.4)

drawerController.drawerVisualStateBlock = { (drawer, drawerSide, percentVisible) in
    if percentVisible > 0 && blurView.superview == nil {
        drawerController.centerViewController?.view.addSubview(blurView)
    }
    if percentVisible == 0 {
        blurView.removeFromSuperview()
    }
}