效果图
前言:
我们在开发工作中很有可能遇到需要view相应各种手势的需求,使用RunTime+Extension的形式为UIView进行拓展,代码的复用性,可读性都很高.
实现效果:
为UIView及其子类添加了点击,双击,长按,上滑,左滑,右滑,下滑手势方法,调用方法简单轻便.
实现方式:
1.添加滑动手势协议.
2.设置RunTime添加属性时的Key.
3.创建点击,长按,滑动手势类.
4.使用Extension为UIView进行拓展.
1.添加滑动手势协议.
在协议中添加滑动事件以及相应触发方法.
///添加点击事件协议
protocol UIViewTapable {
///单击事件
var tapHandlers: [CRTapGestureHanler] { get }
///双击事件
var doubleTapGestureHandlers: [CRTapGestureHanler]{ get }
///长点事件
var longTapGestureHandlers: [CRTapGestureHanler]{ get }
///上滑事件
var upSwipeGestureHandlers: [CRTapGestureHanler]{ get }
///左滑事件
var leftSwipeGestureHandlers: [CRTapGestureHanler]{ get }
///右滑事件
var rightSwipeGestureHandlers: [CRTapGestureHanler]{ get }
///下滑事件
var downSwipeGestureHandlers: [CRTapGestureHanler]{ get }
func whenTapped(handler:@escaping()->Void)
func whenDoubleTapped(handler:@escaping()->Void)
func whenLongPressed(handler:@escaping()->Void)
func whenUpSwiped(handler:@escaping()->Void)
func whenLeftSwiped(handler:@escaping()->Void)
func whenRightSwiped(handler:@escaping()->Void)
func whenDownSwiped(handler:@escaping()->Void)
}
2.设置RunTime添加属性时的Key.
在这里我们设置所有手势相应的String标识以及与之对应的内存地址Key.
///runtime绑定方法时的key
class EWGestureAssociatedObjectKey {
///设置不同手势不同String标识
static let EWTapGestureAssociatedObjectString = "EWTapGestureAssociatedObjectString"
///获取String标识的内存地址作为runtime属性的Key
static var EWTapGestureKey = {return Unmanaged<AnyObject>.passUnretained(EWGestureAssociatedObjectKey.EWTapGestureAssociatedObjectString as AnyObject).toOpaque()}()
static let EWDoubleTapGestureAssociatedObjectString = "EWDoubleTapGestureAssociatedObjectString"
static var EWDoubleTapGestureKey = {return Unmanaged<AnyObject>.passUnretained(EWGestureAssociatedObjectKey.EWDoubleTapGestureAssociatedObjectString as AnyObject).toOpaque()}()
static let EWLongTapGestureAssociatedObjectString = "EWLongTapGestureAssociatedObjectString"
static var EWLongTapGestureKey = {return Unmanaged<AnyObject>.passUnretained(EWGestureAssociatedObjectKey.EWLongTapGestureAssociatedObjectString as AnyObject).toOpaque()}()
static let EWUpSwipeGestureAssociatedObjectString = "EWUpSwipeGestureAssociatedObjectString"
static var EWUpSwipeGestureKey = {return Unmanaged<AnyObject>.passUnretained(EWGestureAssociatedObjectKey.EWUpSwipeGestureAssociatedObjectString as AnyObject).toOpaque()}()
static let EWLeftSwipeGestureAssociatedObjectString = "EWLeftSwipeGestureAssociatedObjectString"
static var EWLeftSwipeGestureKey = {return Unmanaged<AnyObject>.passUnretained(EWGestureAssociatedObjectKey.EWLeftSwipeGestureAssociatedObjectString as AnyObject).toOpaque()}()
static let EWRightSwipeGestureAssociatedObjectString = "EWRightSwipeGestureAssociatedObjectString"
static var EWRightSwipeGestureKey = {return Unmanaged<AnyObject>.passUnretained(EWGestureAssociatedObjectKey.EWRightSwipeGestureAssociatedObjectString as AnyObject).toOpaque()}()
static let EWDownSwipeGestureAssociatedObjectString = "EWDownSwipeGestureAssociatedObjectString"
static var EWDownSwipeGestureKey = {return Unmanaged<AnyObject>.passUnretained(EWGestureAssociatedObjectKey.EWDownSwipeGestureAssociatedObjectString as AnyObject).toOpaque()}()
}
3.创建点击,长按,滑动手势类.
单击双击都是点击手势,使用EWTapGesture,上下左右滑动手势使用EWSwipeGesture
///单击双击手势
class EWTapGesture: NSObject, UIGestureRecognizerDelegate{
fileprivate weak var myView:UIView!
fileprivate let gesture : UITapGestureRecognizer
///手势储存外界闭包
fileprivate var tappedHandler = [EWTapGestureHanler]()
init(view: UIView,taps: Int = 1) {
myView = view
///手势
gesture = UITapGestureRecognizer()
super.init()
gesture.delegate = self
gesture.numberOfTapsRequired = taps
gesture.addTarget(self, action: #selector(EWTapGesture.tapped(_:)))
myView.addGestureRecognizer(gesture)
if taps == 1 {
myView.EWOneTapGesture = self
}else if taps == 2{
myView.EWDoubleTapGesture = self
}
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
///将外界传入的block传入手势方法
fileprivate func registerHandler(_ handler:@escaping EWTapGestureHanler){
self.tappedHandler.append(handler)
}
@objc func tapped(_ sender: UITapGestureRecognizer) {
for handler in self.tappedHandler{
handler()
}
}
}
///长按手势
class EWLongPressGesture {
typealias EWLongPressGestureHandler = ()->Void
fileprivate weak var myView:UIView!
fileprivate let gesture : UILongPressGestureRecognizer
fileprivate var tappedHandler = [EWLongPressGestureHandler]()
init(view:UIView,taps:Int = 1) {
myView = view
gesture = UILongPressGestureRecognizer()
gesture.minimumPressDuration = TimeInterval(taps)
gesture.addTarget(self, action: #selector(EWTapGesture.tapped(_:)))
myView.addGestureRecognizer(gesture)
myView.EWLongTapGesture = self
}
///将外界传入的block传入手势方法
fileprivate func registerHandler(_ handler:@escaping EWLongPressGestureHandler){
self.tappedHandler.append(handler)
}
@objc func tapped(_ sender: UITapGestureRecognizer) {
for handler in self.tappedHandler{
guard gesture.state == .began else { return }
handler()
}
}
}
///滑动手势
class EWSwipeGesture {
typealias EWSwipeGestureHandler = ()->Void
fileprivate weak var myView:UIView!
fileprivate let gesture : UISwipeGestureRecognizer
fileprivate var tappedHandler = [EWSwipeGestureHandler]()
init(view:UIView,direction: UISwipeGestureRecognizer.Direction = .up) {
myView = view
gesture = UISwipeGestureRecognizer()
gesture.direction = direction
gesture.addTarget(self, action: #selector(EWTapGesture.tapped(_:)))
myView.addGestureRecognizer(gesture)
switch direction {
case .up:
myView.EWUpSwipeGesture = self
case .left:
myView.EWLeftSwipeGesture = self
case .right:
myView.EWRightSwipeGesture = self
case .down:
myView.EWDownSwipeGesture = self
default:
return
}
}
fileprivate func registerHandler(_ handler:@escaping EWSwipeGestureHandler){
self.tappedHandler.append(handler)
}
@objc func tapped(_ sender: UITapGestureRecognizer) {
for handler in self.tappedHandler{
handler()
}
}
}
4.使用Extension为UIView进行拓展.
在这里让UIView遵循UIViewTapable协议,并使用RunTime为其增加手势属性.
extension UIView: UIViewTapable {
var tapHandlers: [EWTapGestureHanler]{
return EWOneTapGesture.tappedHandler
}
var doubleTapGestureHandlers: [EWTapGestureHanler]{
return EWDoubleTapGesture.tappedHandler
}
var longTapGestureHandlers: [EWTapGestureHanler]{
return EWLongTapGesture.tappedHandler
}
var upSwipeGestureHandlers: [EWTapGestureHanler] {
return EWUpSwipeGesture.tappedHandler
}
var leftSwipeGestureHandlers: [EWTapGestureHanler] {
return EWLeftSwipeGesture.tappedHandler
}
var rightSwipeGestureHandlers: [EWTapGestureHanler] {
return EWRightSwipeGesture.tappedHandler
}
var downSwipeGestureHandlers: [EWTapGestureHanler] {
return EWDownSwipeGesture.tappedHandler
}
///runtime的方式为View设置手势属性
var EWOneTapGesture: EWTapGesture {
get {
if let obj = objc_getAssociatedObject(self, EWGestureAssociatedObjectKey.EWTapGestureKey) as? EWTapGesture {
return obj
}
let tapGesture = EWTapGesture(view: self)
tapGesture.gesture.require(toFail: EWDoubleTapGesture.gesture)
return tapGesture
}
set {
objc_setAssociatedObject(self, EWGestureAssociatedObjectKey.EWTapGestureKey, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}
}
var EWDoubleTapGesture: EWTapGesture {
get {
if let obj = objc_getAssociatedObject(self, EWGestureAssociatedObjectKey.EWDoubleTapGestureKey) as? EWTapGesture {
return obj
}
return EWTapGesture(view: self,taps: 2)
}
set {
objc_setAssociatedObject(self, EWGestureAssociatedObjectKey.EWDoubleTapGestureKey, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}
}
var EWLongTapGesture:EWLongPressGesture {
get {
if let obj = objc_getAssociatedObject(self, EWGestureAssociatedObjectKey.EWLongTapGestureKey) as? EWLongPressGesture {
return obj
}
return EWLongPressGesture(view: self)
}
set {
objc_setAssociatedObject(self, EWGestureAssociatedObjectKey.EWLongTapGestureKey, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}
}
var EWUpSwipeGesture: EWSwipeGesture {
get {
if let obj = objc_getAssociatedObject(self, EWGestureAssociatedObjectKey.EWUpSwipeGestureKey) as? EWSwipeGesture {
return obj
}
return EWSwipeGesture(view: self)
}
set {
objc_setAssociatedObject(self, EWGestureAssociatedObjectKey.EWUpSwipeGestureKey, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}
}
var EWLeftSwipeGesture: EWSwipeGesture {
get {
if let obj = objc_getAssociatedObject(self, EWGestureAssociatedObjectKey.EWLeftSwipeGestureKey) as? EWSwipeGesture {
return obj
}
return EWSwipeGesture(view: self, direction: .left)
}
set {
objc_setAssociatedObject(self, EWGestureAssociatedObjectKey.EWLeftSwipeGestureKey, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}
}
var EWRightSwipeGesture: EWSwipeGesture {
get {
if let obj = objc_getAssociatedObject(self, EWGestureAssociatedObjectKey.EWRightSwipeGestureKey) as? EWSwipeGesture {
return obj
}
return EWSwipeGesture(view: self, direction: .right)
}
set {
objc_setAssociatedObject(self, EWGestureAssociatedObjectKey.EWRightSwipeGestureKey, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}
}
var EWDownSwipeGesture: EWSwipeGesture {
get {
if let obj = objc_getAssociatedObject(self, EWGestureAssociatedObjectKey.EWDownSwipeGestureKey) as? EWSwipeGesture {
return obj
}
return EWSwipeGesture(view: self, direction: .down)
}
set {
objc_setAssociatedObject(self, EWGestureAssociatedObjectKey.EWDownSwipeGestureKey, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}
}
func whenTapped(handler: @escaping () -> Void){
self.isUserInteractionEnabled = true
self.EWOneTapGesture.registerHandler(handler)
}
func whenDoubleTapped(handler:@escaping ()->Void){
self.isUserInteractionEnabled = true
self.EWDoubleTapGesture.registerHandler(handler)
}
func whenLongPressed(handler:@escaping ()->Void){
self.isUserInteractionEnabled = true
self.EWLongTapGesture.registerHandler(handler)
}
func whenUpSwiped(handler: @escaping () -> Void) {
self.isUserInteractionEnabled = true
self.EWUpSwipeGesture.registerHandler(handler)
}
func whenLeftSwiped(handler: @escaping () -> Void) {
self.isUserInteractionEnabled = true
self.EWLeftSwipeGesture.registerHandler(handler)
}
func whenRightSwiped(handler: @escaping () -> Void) {
self.isUserInteractionEnabled = true
self.EWRightSwipeGesture.registerHandler(handler)
}
func whenDownSwiped(handler: @escaping () -> Void) {
self.isUserInteractionEnabled = true
self.EWDownSwipeGesture.registerHandler(handler)
}
}
使用方法:
将UIView+TappedExtension.swift文件拖入项目,调用时:
tapView.whenTapped {
EWToast.showTopWithText(text: "点击事件", duration: 1)
}
tapView.whenUpSwiped {
EWToast.showCenterWithText(text: "上滑事件", duration: 1)
}
tapView.whenLeftSwiped {
EWToast.showCenterWithText(text: "左滑事件", duration: 1)
}
tapView.whenRightSwiped {
EWToast.showCenterWithText(text: "右滑事件", duration: 1)
}
tapView.whenDownSwiped {
EWToast.showCenterWithText(text: "下滑事件", duration: 1)
}
tapView.whenLongPressed {
EWToast.showCenterWithText(text: "长按事件", duration: 1)
}
tapView.whenDoubleTapped {
EWToast.showBottomWithText(text: "双击事件", duration: 1)
}
demo地址:EWViewTappedExtension
有问题欢迎探讨.
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