本文实现使用了Modal转场动画，原因是项目多由导航控制器和标签控制器作为基类，为了不影响导航控制器的代理，转场动画使用模态交互。
代码使用SnapKit进行布
本文实现使用了Modal转场动画，原因是项目多由导航控制器和标签控制器作为基类，为了不影响导航控制器的代理，转场动画使用模态交互。
代码使用SnapKit进行布局，能够适应屏幕旋转。手势速率大于300或进度超过30%的时候直接完成动画，否则动画回滚取消，具体数值可以修改对应的常量。抽屉出现的时候，主控制有遮罩，对应关键字是mask。
实现文件只有两个
DrawerControl：控制抽屉出现，一行代码即可调用
Animator：负责动画实现，包括了交互式的代理事件和非交互式的代理事件
//
// DrawerControl.swift
// PratiseSwift
//
// Created by EugeneLaw on 2018/7/31.
// Copyright © 2018年 EugeneLaw. All rights reserved.
//
import UIKit
enum DrawerSize {
case Left
case Right
}
class DrawerControl: NSObject {
/**主页面*/
var base: UIViewController?
/**抽屉控制器*/
var drawer: UIViewController?
/**抽屉在左边还是右边，默认左边，没有实现右边，要右边自己去animator里面加判断*/
var whichSize = DrawerSize.Left
/**拖拽手势*/
var panBase: UIPanGestureRecognizer?
var panDrawer: UIPanGestureRecognizer?
/**主页面在抽屉显示时保留的宽度*/
var baseWidth: CGFloat {
get {
return self.animator!.baseWidth
}
set {
self.animator?.baseWidth = newValue
}
}
/**是否应该响应手势*/
var shouldResponseRecognizer = false
/**效果响应*/
var animator: Animator?
init(base: UIViewController, drawer: UIViewController) {
super.init()
self.base = base
self.drawer = drawer
animator = Animator(base: self.base!, drawer: self.drawer!)
self.panBase = UIPanGestureRecognizer(target: self, action: #selector(panBaseAction(pan:)))
base.view.addGestureRecognizer(self.panBase!)
self.panDrawer = UIPanGestureRecognizer(target: self, action: #selector(panDrawerAction(pan:)))
drawer.view.addGestureRecognizer(self.panDrawer!)
self.drawer?.transitioningDelegate = self.animator
}
deinit {
if self.panBase != nil {
self.base?.view.removeGestureRecognizer(self.panBase!)
self.panBase = nil
}
if self.panDrawer != nil {
self.drawer?.view.removeGestureRecognizer(self.panDrawer!)
self.panDrawer = nil
}
}
}
extension DrawerControl {
///显示抽屉
func show() {
if (self.base?.view.frame.origin.x)! > SCREEN_WIDTH/2 {
return
}
self.animator?.interative = false
self.base?.present(self.drawer!, animated: true, completion: nil)
}
///关闭抽屉，或直接dismiss即可
func close() {
self.animator?.interative = false
self.drawer?.dismiss(animated: true, completion: nil)
}
}
extension DrawerControl {
@objc func panBaseAction(pan: UIPanGestureRecognizer) {
let transition = pan.translation(in: self.drawer?.view)
let percentage = CGFloat(transition.x/SCREEN_WIDTH)
let velocity = CGFloat(fabs(pan.velocity(in: self.drawer?.view).x))
switch pan.state {
case .began:
if transition.x < 0 {
shouldResponseRecognizer = false
}else {
shouldResponseRecognizer = true
}
if shouldResponseRecognizer {
self.beginAnimator(showDrawer: true)
}
case .changed:
if shouldResponseRecognizer {
self.updateAnimator(percentage)
}
default:
if shouldResponseRecognizer {
self.cancelAnimator(percentage, velocity: velocity)
}
}
}
@objc func panDrawerAction(pan: UIPanGestureRecognizer) {
let transition = pan.translation(in: self.drawer?.view)
let percentage = CGFloat(-transition.x/SCREEN_WIDTH)
let velocity = CGFloat(fabs(pan.velocity(in: self.drawer?.view).x))
switch pan.state {
case .began:
if transition.x > 0 {
shouldResponseRecognizer = false
}else {
shouldResponseRecognizer = true
}
if shouldResponseRecognizer {
self.beginAnimator(showDrawer: false)
}
case .changed:
if shouldResponseRecognizer {
self.updateAnimator(percentage)
}
default:
if shouldResponseRecognizer {
self.cancelAnimator(percentage, velocity: velocity)
}
}
}
func beginAnimator(showDrawer: Bool) {
self.animator?.interative = true
if showDrawer {
self.base?.transitioningDelegate = self.animator
self.base?.present(self.drawer!, animated: true, completion: nil)
}else {
self.drawer?.transitioningDelegate = self.animator
self.drawer?.dismiss(animated: true, completion: nil)
}
}
func updateAnimator(_ percentage: CGFloat) {
self.animator?.update(percentage)
}
func cancelAnimator(_ percentage: CGFloat, velocity: CGFloat) {
if percentage < 0.3 && velocity < 300 {
self.animator?.cancel()
}else {
self.animator?.finish()
}
}
}
//
// Animator.swift
// PratiseSwift
//
// Created by EugeneLaw on 2018/7/31.
// Copyright © 2018年 EugeneLaw. All rights reserved.
//
import UIKit
let DRAWER_ANIMATION_TIME = 0.3
class Animator: UIPercentDrivenInteractiveTransition, UIViewControllerTransitioningDelegate, UIViewControllerAnimatedTransitioning {
/**是否交互转场*/
var interative = false
var showDrawer = false
var base: UIViewController?
var drawer:UIViewController?
/**主页面在抽屉显示时保留的宽度*/
var baseWidth: CGFloat = 100
lazy var mask = { () -> UIButton in
let mask = UIButton()
mask.addTarget(self, action: #selector(maskClicked(_:)), for: .touchUpInside)
return mask
}()
init(base: UIViewController, drawer: UIViewController) {
super.init()
self.base = base
self.drawer = drawer
UIDevice.current.beginGeneratingDeviceOrientationNotifications()
NotificationCenter.default.addObserver(self, selector: #selector(observeDeviceOrientation(_:)), name: .UIDeviceOrientationDidChange, object: nil)
}
@objc func observeDeviceOrientation(_ notification: NSObject) {
if let superView = self.base?.view.superview {
if showDrawer {
self.base?.view.snp.remakeConstraints({ (make) in
make.width.equalTo(SCREEN_WIDTH)
make.left.equalTo(superView.snp.right).offset(-self.baseWidth)
make.top.bottom.equalTo(superView)
})
}else {
self.base?.view.snp.remakeConstraints({ (make) in
make.edges.equalTo(superView)
})
}
superView.layoutIfNeeded()
}
}
deinit {
NotificationCenter.default.removeObserver(self)
}
}
extension Animator {
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
if showDrawer {
let fromView = transitionContext.view(forKey: .from)
addShadowToView(fromView!, color: .black, offset: CGSize(width: -1, height: 0), radius: 3, opacity: 0.1)
let toView = transitionContext.view(forKey: .to)
let containerView = transitionContext.containerView
containerView.addSubview(toView!)
containerView.addSubview(fromView!)
fromView?.snp.remakeConstraints({ (make) in
make.edges.equalTo(containerView)
})
toView?.snp.remakeConstraints({ (make) in
make.edges.equalTo(containerView)
})
containerView.layoutIfNeeded()
UIView.animate(withDuration: DRAWER_ANIMATION_TIME, animations: {
fromView?.snp.remakeConstraints({ (make) in
make.left.equalTo((toView?.snp.right)!).offset(-self.baseWidth)
make.width.top.bottom.equalTo(toView!)
})
containerView.layoutIfNeeded()
}) { (finish) in
let cancel = transitionContext.transitionWasCancelled
transitionContext.completeTransition(!cancel)
if !cancel {//取消状态下区分添加到哪一个父视图，弄错会导致黑屏
if self.drawer?.view.superview != nil {
self.drawer?.view?.snp.remakeConstraints({ (make) in
make.edges.equalTo((self.drawer?.view?.superview)!)
})
}
self.showPartOfView()
}else {
fromView?.snp.remakeConstraints({ (make) in
make.edges.equalTo((fromView?.superview)!)
})
}
}
}else {
let fromView = transitionContext.view(forKey: .from)
let toView = transitionContext.view(forKey: .to)
addShadowToView(toView!, color: .black, offset: CGSize(width: -1, height: 0), radius: 3, opacity: 0.1)
let containerView = transitionContext.containerView
containerView.addSubview(fromView!)
containerView.addSubview(toView!)
fromView?.snp.remakeConstraints({ (make) in
make.edges.equalTo(containerView)
})
toView?.snp.remakeConstraints({ (make) in
make.left.equalTo(containerView.snp.right).offset(-self.baseWidth)
make.width.equalTo(SCREEN_WIDTH)
make.height.equalTo(SCREEN_HEIGHT)
make.top.bottom.equalTo(containerView)
})
containerView.layoutIfNeeded()
UIView.animate(withDuration: DRAWER_ANIMATION_TIME, animations: {
toView?.snp.remakeConstraints({ (make) in
make.edges.equalTo(containerView)
})
containerView.layoutIfNeeded()
}) { (finish) in
let cancel = transitionContext.transitionWasCancelled
transitionContext.completeTransition(!cancel)
toView?.snp.remakeConstraints({ (make) in
make.edges.equalTo((toView?.superview)!)
})
if minX((self.base?.view)!) <= 0 {//判断结束时候是否回到主视图
self.base?.view.isUserInteractionEnabled = true
}
}
}
}
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return DRAWER_ANIMATION_TIME
}
override func startInteractiveTransition(_ transitionContext: UIViewControllerContextTransitioning) {
super.startInteractiveTransition(transitionContext)
}
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
self.showDrawer = true
return self
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
self.showDrawer = false
return self
}
func interactionControllerForPresentation(using animator: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning? {
if interative {
return self
}else {
return nil
}
}
func interactionControllerForDismissal(using animator: UIViewControllerAnimatedTransitioning) -> UIViewControllerInteractiveTransitioning? {
if interative {
return self
}else {
return nil
}
}
}
extension Animator {
func showPartOfView() {
self.drawer?.view.addSubview((self.base?.view)!)
self.base?.view.snp.remakeConstraints({ (make) in
make.left.equalTo((self.drawer?.view.snp.right)!).offset(-self.baseWidth)
make.top.bottom.equalTo((self.drawer?.view)!)
make.width.equalTo(SCREEN_WIDTH)
})
//遮罩
self.drawer?.view.insertSubview(mask, aboveSubview: (self.base?.view)!)
self.base?.view.isUserInteractionEnabled = false//阻止交互
mask.snp.remakeConstraints { (make) in
make.left.equalTo((mask.superview?.snp.right)!).offset(-baseWidth)
make.top.width.bottom.equalTo(mask.superview!);
}
self.drawer?.view.superview?.layoutIfNeeded()
}
@objc func maskClicked(_ button: UIButton) {
button.removeFromSuperview()
self.drawer?.dismiss(animated: true, completion: nil)
}
}
按钮调用例子：（手势控制已经自动添加到主控制器和抽屉控制器的view上）
创建推出抽屉的控制类，参数分别是主控制器和抽屉控制器。在我自己的练习工程中，把这个控制类定义为总控制器（包括了导航控制器和标签控制器的控制类）的一个属性。创建这个抽屉控制类的时候，我把导航控制器（它的root是标签控制器）当做主控制器传给第一个参数。
self.drawer = DrawerControl(base: self.navigation!, drawer: self.drawerPage)
调用的时候只需要使用抽屉控制类的show方法即可，练习工程中我把该按钮封装在导航菜单里面，它响应的时候会调用总控制器的单例，调用单例记录的抽屉控制器属性。
@objc func btnMenuClicked(_ button: UIButton) {
TotalControl.instance().drawer?.show()
}
附录：用到的一些变量
//
// Headers.swift
// PratiseSwift
//
// Created by EugeneLaw on 2018/7/23.
// Copyright © 2018年 EugeneLaw. All rights reserved.
//
import UIKit
//MARK: 设备
let isRetina = (UIScreen.instancesRespond(to: #selector(getter: UIScreen.currentMode)) ? __CGSizeEqualToSize(CGSize(width: 640, height: 960), (UIScreen.main.currentMode?.size)!) : false)
let iPhone5 = (UIScreen.instancesRespond(to: #selector(getter: UIScreen.currentMode)) ? __CGSizeEqualToSize(CGSize(width: 640, height: 1136), (UIScreen.main.currentMode?.size)!) : false)
let iPhone6 = (UIScreen.instancesRespond(to: #selector(getter: UIScreen.currentMode)) ? __CGSizeEqualToSize(CGSize(width: 750, height: 1334), (UIScreen.main.currentMode?.size)!) : false)
let iPhone6Plus = (UIScreen.instancesRespond(to: #selector(getter: UIScreen.currentMode)) ? __CGSizeEqualToSize(CGSize(width: 1242, height: 2208), (UIScreen.main.currentMode?.size)!) : false)
let isPad = (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiom.pad)
let isPhone = (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiom.phone)
let isiPhoneX = (UIScreen.instancesRespond(to: #selector(getter: UIScreen.currentMode)) ? __CGSizeEqualToSize(CGSize(width: 1125, height: 2436), (UIScreen.main.currentMode?.size)!) : false)
//MARK: 界面
let TABBAR_HEIGHT = (isiPhoneX ? 83 : 49)
let NAVIGATION_HEIGHT = (isiPhoneX ? 88 : 64)
var SCREEN_WIDTH: CGFloat {
get {
return SCREEN_WIDTH_FUNC()
}
}
var SCREEN_HEIGHT: CGFloat {
get {
return SCREEN_HEIGHT_FUNC()
}
}
func SCREEN_WIDTH_FUNC() -> CGFloat {
return UIScreen.main.bounds.size.width
}
func SCREEN_HEIGHT_FUNC() -> CGFloat {
return UIScreen.main.bounds.size.height
}
//MARK: 颜色
let COLOR_WHITESMOKE = ColorHex("#F5F5F5")
/**
*十六进制颜色值转换成UIColor
*@param "#000000"
*/
func ColorHex(_ color: String) -> UIColor? {
if color.count <= 0 || color.count != 7 || color == "(null)" || color == "<null>" {
return nil
}
var red: UInt32 = 0x0
var green: UInt32 = 0x0
var blue: UInt32 = 0x0
let redString = String(color[color.index(color.startIndex, offsetBy: 1)...color.index(color.startIndex, offsetBy: 2)])
let greenString = String(color[color.index(color.startIndex, offsetBy: 3)...color.index(color.startIndex, offsetBy: 4)])
let blueString = String(color[color.index(color.startIndex, offsetBy: 5)...color.index(color.startIndex, offsetBy: 6)])
Scanner(string: redString).scanHexInt32(&red)
Scanner(string: greenString).scanHexInt32(&green)
Scanner(string: blueString).scanHexInt32(&blue)
let hexColor = UIColor.init(red: CGFloat(red)/255.0, green: CGFloat(green)/255.0, blue: CGFloat(blue)/255.0, alpha: 1)
return hexColor
}
/**
*给图层添加阴影
*/
func addShadowToView(_ view: UIView, color: UIColor, offset: CGSize, radius: CGFloat, opacity: Float) {
view.layer.shadowColor = color.cgColor
view.layer.shadowOffset = offset
view.layer.shadowOpacity = opacity
view.layer.shadowRadius = radius
}
/**
*计算图层的宽度
*/
func width(_ object: UIView) -> CGFloat {
return object.frame.width
}
/**
*在父视图中的x坐标
*/
func minX(_ object: UIView) -> CGFloat {
return object.frame.origin.x
}
/**
*在父视图中的x坐标+自身宽度
*/
func maxX(_ object: UIView) -> CGFloat {
return object.frame.origin.x+width(object)
}
/**
*在父视图中的y坐标
*/
func minY(_ object: UIView) -> CGFloat {
return object.frame.origin.y
}
/**
*在父视图中的y坐标+自身高度
*/
func maxY(_ object: UIView) -> CGFloat {
return object.frame.origin.y+height(object)
}
/**
*计算图层的高度
*/
func height(_ object: UIView) -> CGFloat {
return object.frame.height
}
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好代码网。