导读
简单用swift写了一个抽屉效果,可以直接使用并且简单;
很多软件都运了抽屉效果，比如qq的左抽屉，英雄联盟,滴滴打车，和uber等等都运用了抽屉;
效果
ios抽屉式结构实现分析
主要是在控制器的view上添加了两个view,一个左侧leftview和一个mainview。这里我们自定义一个drawerviewcontroller，init(mainvc: uiviewcontroller, leftmenuvc: uiviewcontroller, leftwidth: cgfloat)设置，一个mainvc，一个leftmenuvc，和一个宽度,将mainvc和leftmenuvc的view添加到controller的view上（menuvc的view在下面）。
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view.addsubview(leftmenuvc.view)view.addsubview(mainvc.view)addchildviewcontroller(leftmenuvc)addchildviewcontroller(mainvc) |
然后首先实现点击方法openleftmenu和closeleftmenu（这两个方法主要是计算mainvc的view的位置）方便以后调用。
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//mark: - 打开左侧菜单 func openleftmenu() { uiview.animate(withduration: 0.25, delay: 0, options: uiviewanimationoptions.curvelinear, animations: { self.leftvc?.view.transform = cgaffinetransform.identity self.mainvc?.view.transform = cgaffinetransform(translationx: self.maxwidth, y: 0) }, completion: { (finish: bool) -> () in self.mainvc?.view.addsubview(self.coverbtn) }) } //mark: - 关闭左侧菜单 func closeleftmenu() { uiview.animate(withduration: 0.25, delay: 0, options: uiviewanimationoptions.curvelinear, animations: { self.leftvc?.view.transform = cgaffinetransform(translationx: -self.maxwidth, y: 0) self.mainvc?.view.transform = cgaffinetransform.identity }, completion: { (finish: bool) -> () in self.coverbtn.removefromsuperview() }) } |
最后给mainvc的view添加屏幕边缘手势，实现mainvc的view跟随手指移动。循环遍历view给每一个一级视图添加手势
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for childviewcontroller in (mainvc?.childviewcontrollers)! { addscreenedgepangesturerecognizertoview(view: childviewcontroller.view) } |
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//mark: - 添加屏幕边缘手势 private func addscreenedgepangesturerecognizertoview(view: uiview) { let pan = uiscreenedgepangesturerecognizer(target: self, action: #selector(edgpangesture(_:))) pan.edges = uirectedge.left view.addgesturerecognizer(pan) } |
在平移手势调用的方法中，通过偏移量来确定mainview的frame，实现动画效果
- 首先通过pan.translation(in: pan.view).x方法获取偏移量,通过偏移量的正负确定拖动的方向
- 当手指松开后需要根据mainview的x值确定其视图是定位到原始位置还是其缩放的位置
打开手势
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//mark: - 屏幕左边缘手势 func edgpangesture(_ pan: uiscreenedgepangesturerecognizer) { let offsetx = pan.translation(in: pan.view).x if pan.state == uigesturerecognizerstate.changed && offsetx <= maxwidth { mainvc?.view.transform = cgaffinetransform(translationx: max(offsetx, 0), y: 0) leftvc?.view.transform = cgaffinetransform(translationx: -maxwidth + offsetx, y: 0) } else if pan.state == uigesturerecognizerstate.ended || pan.state == uigesturerecognizerstate.cancelled || pan.state == uigesturerecognizerstate.failed { if offsetx > screenw * 0.5 { openleftmenu() } else { closeleftmenu() } } } |
关闭遮盖手势
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//mark: - 遮盖按钮手势 func pancloseleftmenu(_ pan: uipangesturerecognizer) { let offsetx = pan.translation(in: pan.view).x if offsetx > 0 {return} if pan.state == uigesturerecognizerstate.changed && offsetx >= -maxwidth { let distace = maxwidth + offsetx mainvc?.view.transform = cgaffinetransform(translationx: distace, y: 0) leftvc?.view.transform = cgaffinetransform(translationx: offsetx, y: 0) } else if pan.state == uigesturerecognizerstate.ended || pan.state == uigesturerecognizerstate.cancelled || pan.state == uigesturerecognizerstate.failed { if offsetx > screenw * 0.5 { openleftmenu() } else { closeleftmenu() } } } |
uipresentationcontroller简介
- uipresentationcontroller是 ios8 新增的一个api，苹果的官方定义是：对象为所呈现的视图控制器提供高级视图的转换管理（从呈现视图控制器的时间直到它被消除期间）;
- ios 8以前就是自定义view,去画一个三角和长方形;
- 简单直接的方法用图片
直接贴代码不讲废话
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@ibaction func showalert(_ sender: uibarbuttonitem) { let popvc = popviewcontroller() popvc.modalpresentationstyle = uimodalpresentationstyle.popover popvc.popoverpresentationcontroller?.barbuttonitem = sender popvc.popoverpresentationcontroller?.delegate = self //可控制三角颜色 popvc.popoverpresentationcontroller?.backgroundcolor = uicolor.white present(popvc, animated: true, completion: nil) } func adaptivepresentationstyle(for controller: uipresentationcontroller) -> uimodalpresentationstyle { return uimodalpresentationstyle.none } func popoverpresentationcontrollershoulddismisspopover(_ popoverpresentationcontroller: uipopoverpresentationcontroller) -> bool { return true } |
具体代码可以从这里下载：wldrawerview.rar
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://www.jianshu.com/p/679b94639765#
