[英]Dynamic Creation UIButton AddTarget on UIView executed on UIViewController
目前,该代码执行一个标签样式化列表,问题仍然当我想尝试的addTarget行动optionClicked传递给我的UIViewController
DrawerView.swift
let menuOptions = ["Info", "Actions", "Users", "Patiens"]
menuOptions.forEach({
let button = UIButton()
button.setTitle($0, for: .normal)
if $0.contains(menuOptions[0]) {
button.style(with: .filled)
} else {
button.style(with: .outlined)
button.addTarget(self, action: #selector(optionClicked(_:)), for: .touchUpInside)
}
actionStackView.addArrangedSubview(button)
})
DrawerController.swift
class DrawerController: UIViewController {
var shareView = DrawerView()
var viewModel: CarDetailViewModel?
override func loadView() {
shareView.viewModel = viewModel
view = shareView
}
@objc func optionClicked(_ sender: UIButton) {
let feedbackGenerator = UISelectionFeedbackGenerator()
feedbackGenerator.selectionChanged()
let optionClicked: String = sender.titleLabel?.text ?? "0"
switch optionClicked {
case "Actions": present(DrawerActionController(), animated: true, completion: nil)
case "Notifications":
let viewController = DrawerNotificationController()
viewController.carDetailViewModel = viewModel
present(viewController, animated: true, completion: nil)
case "Patients":
let viewUserController = DrawerUserController()
viewUserController.carPath = "9000"
present(viewUserController, animated: true, completion: nil)
default: break
}
}
}
尝试使用button.addTarget(self,action:#selector(optionClicked(_ :)),用于:.touchUpInside),但没有解决。
在方法button.addTarget(self, action: #selector(optionClicked(_:)), for: .touchUpInside)
您需要提供指向将接收动作的viewController的指针。
在您的情况下,最简单的方法是使用init上的DrawerController创建惰性变量DrawerView并在按钮操作中使用抽屉控制器。
DrawerView.swift
class DrawerView: UIView {
private unowned let drawerController: DrawerController
init(drawerController: DrawerController) {
self.drawerController = drawerController
}
... wherever is your code placed ...
let menuOptions = ["Info", "Actions", "Users", "Patiens"]
menuOptions.forEach({
let button = UIButton()
button.setTitle($0, for: .normal)
if $0.contains(menuOptions[0]) {
button.style(with: .filled)
} else {
button.style(with: .outlined)
button.addTarget(drawerController, action: #selector(DrawerController.optionClicked(_:)), for: .touchUpInside)
actionStackView.addArrangedSubview(button)
}
})
....
}
重要的是,您必须使用unowned
或weak
unowned
来防止保留周期和内存泄漏
要创建DrawerView,可以使用惰性变量:
lazy var shareView: DrawerView = DrawerView(drawerController: self)
lazy允许您使用self,也可以使用optional并在以后创建变量,但这基本上是lazy所做的。
希望能帮助到你!
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