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)
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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()
})
}
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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)
}
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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()
}
}
}
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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()
}
}
}
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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
}
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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#