SWIFT 抽屉菜单

概述参考网页：http://segmentfault.com/a/1190000002420095 写的真不错。赞 横向滑动的手势 *** 作则是这两行代码： let panGestureRecognizer = UIPanGestureRecognizer(target: self, action: "handlePanGesture:")centerNavigationController.view.a

参考网页：http://segmentfault.com/a/1190000002420095

写的真不错。赞

横向滑动的手势 *** 作则是这两行代码：

let panGestureRecognizer = UIPanGestureRecognizer(target: self,action: "handlePanGesture:")centerNavigationController.vIEw.addGestureRecognizer(panGestureRecognizer)

handlePanGesture 处理了滑动手势：

func handlePanGesture(recognizer: UIPanGestureRecognizer) {    // 判断是否从左向右    let gestureIsDraggingFromleftToRight = (recognizer.veLocityInVIEw(vIEw).x > 0)    switch(recognizer.state) {    // 刚刚开始滑动    case .Began:        // 如果刚刚开始滑动的时候还处于主页面，则根据左右方向加入侧面菜单        if (currentState == .BothCollapsed) {            if (gestureIsDraggingFromleftToRight) {                addleftPanelVIEwController()            } else {                addRightPanelVIEwController()            }        }    // 如果是正在滑动，则偏移主视图的坐标实现跟随手指位置移动    case .Changed:        recognizer.vIEw!.center.x = recognizer.vIEw!.center.x + recognizer.translationInVIEw(vIEw).x        recognizer.setTranslation(CGPointZero,inVIEw: vIEw)    // 如果滑动结束    case .Ended:        // 判断该左还是该右        if (leftVIEwController != nil) {            let hasMovedGreaterThanHalfway = recognizer.vIEw!.center.x > vIEw.bounds.size.wIDth animateleftPanel(shouldExpand: hasMovedGreaterThanHalfway) } else if (rightVIEwController != nil) {            let hasMovedGreaterThanHalfway = recognizer.vIEw!.center.x < 0            animateRightPanel(shouldExpand: hasMovedGreaterThanHalfway)        }    default:        break    }}

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