Question

我创建了一个自定义视图，其中包含一个日期选择器和一个提交按钮。当我在视图控制器中创建并调用此视图时，该按钮无法立即起作用，因此必须先使用datepicker拨盘进行几次播放，然后才能起作用。我觉得我很陌生，因为我很陌生。任何帮助表示赞赏。

这是我的自定义视图代码

func setupDatePicker() {
    datepicker = UIDatePicker()
    datepicker.minimumDate = Date()
    datepicker.addTarget(self, action: #selector(datePicker(sender:)), for: .valueChanged)
    datepicker.setValue(Colors.starYellow, forKey: "textColor")
}

func setupButton(){
    submitButton = CustomButton()
    submitButton.setTitle("Submit", for: .normal)
    submitButton.addTarget(self, action: #selector(dateSubmission(sender:)), for: .touchUpInside)

}

func addingSubviews() {
    setupButton()
    addSubview(submitButton)
    bringSubviewToFront(submitButton)
    setupDatePicker()
    addSubview(datepicker)
}



func setupConstraints(){

    addingSubviews()
    //Custom View Constraints
    translatesAutoresizingMaskIntoConstraints = false
    leadingAnchor.constraint(equalTo: superview!.leadingAnchor, constant: 20).isActive = true
    trailingAnchor.constraint(equalTo: superview!.trailingAnchor, constant: -20).isActive = true
    heightAnchor.constraint(equalToConstant: 80).isActive = true
    centerYAnchor.constraint(equalTo: superview!.centerYAnchor).isActive = true
    backgroundColor = Colors.darkBackground
    layer.cornerRadius = 15

    //DatePicker Constraints
    datepicker.translatesAutoresizingMaskIntoConstraints = false
    datepicker.leadingAnchor.constraint(equalTo: self.leadingAnchor, constant: 10).isActive = true
    datepicker.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -10).isActive = true
    datepicker.heightAnchor.constraint(equalToConstant: 50).isActive = true
    datepicker.centerYAnchor.constraint(equalTo: self.centerYAnchor).isActive = true


    // Button Constraints

    submitButton.translatesAutoresizingMaskIntoConstraints = false
    submitButton.leadingAnchor.constraint(equalTo: datepicker.leadingAnchor, constant: 100).isActive = true
    submitButton.trailingAnchor.constraint(equalTo: datepicker.trailingAnchor, constant: -100).isActive = true
    submitButton.heightAnchor.constraint(equalToConstant: 30).isActive = true
    submitButton.bottomAnchor.constraint(equalTo: datepicker.bottomAnchor, constant: 35).isActive = true



}


override func didMoveToSuperview() {
   setupConstraints()
}


@objc func datePicker(sender: UIDatePicker){
    self.datepicked = sender.date
    print("Date selected: \(datepicked)")
}

这是未被调用的功能

    @objc func dateSubmission(sender: CustomButton){
        sender.shake()
        let currentDate = Date()
        let interval = datepicked?.timeIntervalSince(currentDate)
        print(interval)
        let notifcation = UNMutableNotificationContent()
        notifcation.title = notificationTitle ?? "title empty"
        notifcation.subtitle = "test"
        notifcation.body = "test2"
        notifcation.badge = 1

        let trigger = UNTimeIntervalNotificationTrigger(timeInterval: interval!, repeats: false)
        let request = UNNotificationRequest(identifier: "taskReminder", content: notifcation, trigger: trigger)
        UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)
    }


}

这是我在要显示视图的视图控制器中创建自定义视图的方式。

var customView: CustomView!
 func createReminderView(indexPath: IndexPath){
    let task = tasks[indexPath.row]

    customView = CustomView()
    customView.notificationTitle = task.task
    view.addSubview(customView)
    view.bringSubviewToFront(customView)
    }

谢谢您的时间。

查看调试器：

Answer 1

我很确定，如果您设置 clipsToBounds = true ，您将看不到该按钮。因为您的自定义视图没有足够的高度

我看到的是约束错误

1）自定义视图的高度为80，但日期选择器高度为 50 ，并且从您的自定义视图的中心开始，因此它的y位置将为 15

2）提交按钮的高度为30，也位于35顶部，而日期选择器的底部则只有15个像素（由于中心Y）

解决方案：

您的约束应为

DatePicker =->开头（CustomView），结尾（CustomView），顶部（CustomView），底部（Submit Button）

自定义按钮 =->根据您的要求，开头，结尾，底部（CustomView），高度（30）

按钮被某些东西覆盖，无法正常工作

1 个答案: