Ios 在Swift中创建可重用视图并添加完成处理程序
我创建了一个sliderView，并添加了一个UIPanGesture，还创建了一个单独的UIView来处理这个滑块。我希望能够在需要的不同ViewController中调用此SliderView，但当我尝试运行代码时，它崩溃了。我还希望传递一个完成处理程序来处理ViewController中需要它的事件。我试图通过创建一个UIView并在多个屏幕中使用它来遵循干燥过程。下面是到目前为止我的代码Ios 在Swift中创建可重用视图并添加完成处理程序,ios,swift,completionhandler,Ios,Swift,Completionhandler,我创建了一个sliderView，并添加了一个UIPanGesture，还创建了一个单独的UIView来处理这个滑块。我希望能够在需要的不同ViewController中调用此SliderView，但当我尝试运行代码时，它崩溃了。我还希望传递一个完成处理程序来处理ViewController中需要它的事件。我试图通过创建一个UIView并在多个屏幕中使用它来遵循干燥过程。下面是到目前为止我的代码 class TripView: UIView { var shouldSetupConst
class TripView: UIView {
var shouldSetupConstraints = true
var startingFrame: CGRect?
var sliderView: UIView!
var sliderImage: UIImageView!
let screenSize = UIScreen.main.bounds
override init(frame: CGRect){
super.init(frame: frame)
swipeFunc()
sliderView = UIImageView(frame: CGRect.zero)
sliderView.backgroundColor = UIColor.green
sliderView.autoSetDimension(.height, toSize: screenSize.width / 6)
self.addSubview(sliderView)
sliderImage = UIImageView(frame: CGRect.zero)
sliderImage.backgroundColor = UIColor.clear
sliderImage.image = UIImage(named: "icons8-double_right_filled.png")
sliderImage.contentMode = .scaleAspectFit
sliderImage.autoSetDimension(.width, toSize: screenSize.width / 6)
sliderImage.autoSetDimension(.height, toSize: screenSize.width / 6)
self.addSubview(sliderImage)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override func updateConstraints() {
if(shouldSetupConstraints) {
sliderView.autoPinEdgesToSuperviewSafeArea(with: UIEdgeInsets.zero, excludingEdge: .bottom)
sliderImage.autoPinEdge(toSuperviewEdge: .left)
sliderImage.autoPinEdge(.bottom, to: .bottom, of: sliderView, withOffset: 0.0)
shouldSetupConstraints = false
}
super.updateConstraints()
}
}
extension TripView {
private func swipeFunc() {
let swipeGesture = UIPanGestureRecognizer(target: self, action: #selector(acknowledgeSwiped(sender:)))
sliderImage.addGestureRecognizer(swipeGesture)
sliderImage.isUserInteractionEnabled = true
swipeGesture.delegate = self as? UIGestureRecognizerDelegate
}
@objc func acknowledgeSwiped(sender: UIPanGestureRecognizer) {
if let sliderView = sender.view {
let translation = sender.translation(in: sliderView)
switch sender.state {
case .began:
startingFrame = sliderImage.frame
fallthrough
case .changed:
if let startFrame = startingFrame {
var movex = translation.x
if movex < -startFrame.origin.x { movex = -startFrame.origin.x }
let xMax = sliderView.frame.width - startFrame.origin.x - startFrame.width
if movex > xMax {
movex = xMax
// I WANT TO PASS A COMPLETION HANDLER HERE. TO BE ABLE TO HANDLE OTHER EVENTS IN VIEWCONTROLLERS
}
var movey = translation.y
if movey < -startFrame.origin.y { movey = -startFrame.origin.y }
let yMax = sliderView.frame.height - startFrame.origin.y - startFrame.height
if movey > yMax {
movey = yMax
}
sliderView.transform = CGAffineTransform(translationX: movex, y: movey)
}
default: // .ended and others:
UIView.animate(withDuration: 0.1, animations: {
sliderView.transform = CGAffineTransform.identity
})
}
}
}
}
类TripView:UIView{
var shouldSetupConstraints=true
变量开始帧：CGRect？
var sliderView:UIView！
var sliderImage:UIImageView！
让screenSize=UIScreen.main.bounds
重写初始化（帧：CGRect）{
super.init（frame:frame）
swipeFunc（）
sliderView=UIImageView（帧：cRect.zero）
sliderView.backgroundColor=UIColor.green
sliderView.autoSetDimension（.height，toSize:screenSize.width/6）
self.addSubview（sliderView）
sliderImage=UIImageView（帧：cRect.zero）
sliderImage.backgroundColor=UIColor.clear
sliderImage.image=UIImage（名为：“icons8-double\u right\u filled.png”）
sliderImage.contentMode=.ScaleSpectFit
sliderImage.autoSetDimension（.width，toSize:screenSize.width/6）
sliderImage.autoSetDimension（.height，toSize:screenSize.width/6）
self.addSubview（幻灯片图像）
}
必需的初始化？（编码器aDecoder:NSCoder）{
super.init（编码者：aDecoder）
}
重写func updateConstraints（）{
如果（应设置约束）{
sliderView.autoPinEdgesToSuperviewSafeArea（带：UIEdgeInsets.zero，不包括边缘：。底部）
sliderImage.AutoPineEdge（toSuperviewEdge:.左）
SlideImage.AutoPineEdge（.bottom，to:.bottom，of:sliderView，带偏移量：0.0）
shouldSetupConstraints=false
}
super.updateConstraints（）
}
}
扩展TripView{
私有函数swipeFunc（）{
让swipeGesture=UIPangestureRecognitor（目标：自我，操作：#选择器（确认擦除（发送方：））
sliderImage.AddGestureRecognitor（swipeGesture）
sliderImage.isUserInteractionEnabled=true
swipeGesture.delegate=自我身份？UIgestureRecognitizerDelegate
}
@objc func确认擦除（发送方：UIPangestureRecognitizer）{
如果let sliderView=sender.view{
让translation=sender.translation（in:sliderView）
切换发送器状态{
案例.开始：
startingFrame=sliderImage.frame
失败
案例。更改：
如果让startFrame=startingFrame{
var movex=translation.x
如果movex<-startFrame.origin.x{movex=-startFrame.origin.x}
设xMax=sliderView.frame.width-startFrame.origin.x-startFrame.width
如果movex>xMax{
movex=xMax
//我想在这里传递一个完成处理程序。以便能够处理ViewController中的其他事件
}
var movey=translation.y
如果movey<-startFrame.origin.y{movey=-startFrame.origin.y}
设yMax=sliderView.frame.height-startFrame.origin.y-startFrame.height
如果movey>yMax{
movey=yMax
}
sliderView.transform=CGAffineTransform（translationX:movex，y:movey）
}
默认值：//。结束和其他：
UIView.animate（持续时间：0.1，动画：{
sliderView.transform=CGAffineTransform.identity
})
}
}
}
}
swipeFuncsliderImagesliderImageswipeFunc（）initlet sliderView: UIView = UIImageView(frame: CGRect.zero)
let sliderImage: UIImageView = UIImageView(frame: CGRect.zero)
let sliderView: UIView = UIImageView(frame: CGRect.zero)
let sliderImage: UIImageView = UIImageView(frame: CGRect.zero)
override init(frame: CGRect){
super.init(frame: frame)
commonInit()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
commonInit()
}
private func commonInit() {
sliderView.backgroundColor = UIColor.green
sliderView.autoSetDimension(.height, toSize: screenSize.width / 6)
self.addSubview(sliderView)
sliderImage.backgroundColor = UIColor.clear
sliderImage.image = UIImage(named: "icons8-double_right_filled.png")
sliderImage.contentMode = .scaleAspectFit
sliderImage.autoSetDimension(.width, toSize: screenSize.width / 6)
sliderImage.autoSetDimension(.height, toSize: screenSize.width / 6)
self.addSubview(sliderImage)
swipeFunc()
}
class TripView: UIView {
var onChange: (() -> Void)?
}
onChange?()
var tripView: TripView = ...
tripView.onChange = {
// handle the event
}
您正在调用
swipeFuncsliderImagesliderImageswipeFunc（）initlet sliderView: UIView = UIImageView(frame: CGRect.zero)
let sliderImage: UIImageView = UIImageView(frame: CGRect.zero)
let sliderView: UIView = UIImageView(frame: CGRect.zero)
let sliderImage: UIImageView = UIImageView(frame: CGRect.zero)
override init(frame: CGRect){
super.init(frame: frame)
commonInit()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
commonInit()
}
private func commonInit() {
sliderView.backgroundColor = UIColor.green
sliderView.autoSetDimension(.height, toSize: screenSize.width / 6)
self.addSubview(sliderView)
sliderImage.backgroundColor = UIColor.clear
sliderImage.image = UIImage(named: "icons8-double_right_filled.png")
sliderImage.contentMode = .scaleAspectFit
sliderImage.autoSetDimension(.width, toSize: screenSize.width / 6)
sliderImage.autoSetDimension(.height, toSize: screenSize.width / 6)
self.addSubview(sliderImage)
swipeFunc()
}
class TripView: UIView {
var onChange: (() -> Void)?
}
onChange?()
var tripView: TripView = ...
tripView.onChange = {
// handle the event
}
您可以添加一个完成处理程序作为内部变量，或者在初始化器中传递一个 e、 g: 然后在要触发回调的地方，只需调用：
callback()
protocol TripViewDelegate {
func didDoSomething(for view: TripView)
}
class TripView: UIView {
weak var tripViewDelegate: TripViewDelegate?
// ...
}
tripViewDelegate?.didDoSomething(for: self)
您可以添加一个完成处理程序作为内部变量，或者在初始化器中传递一个 e、 g: 然后在要触发回调的地方，只需调用：
callback()
protocol TripViewDelegate {
func didDoSomething(for view: TripView)
}
class TripView: UIView {
weak var tripViewDelegate: TripViewDelegate?
// ...
}
tripViewDelegate?.didDoSomething(for: self)
它在哪里崩溃了？这里是
sliderImage.addgestureignizer（swipeGesture）sliderImage.addgestureignizer（swipeGesture）sliderImagenilTripView（frame:）sliderImage.addgestureRecognitizer（swipeGesture）sliderImage.addgestureRecognitizer（swipeGesture）sliderImagenil