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ios - swift 4中的自定义日期选择器标签

问题描述

我有一个集合视图，其中在标题中使用了一个标签。我想在单击此标签时显示一个日期选择器。已创建自定义日期选择器标签但是我不知道如何在我的控制器中使用此日期选择器标签目前单击日期标题标签时不显示日期选择器。

class DatePickerLabel: UILabel {

private let _inputView: UIView? = {
    let picker = UIDatePicker()
    return picker
}()

private let _inputAccessoryToolbar: UIToolbar = {
    let toolBar = UIToolbar()
    toolBar.barStyle = UIBarStyle.default
    toolBar.isTranslucent = true
    toolBar.sizeToFit()
    return toolBar
}()

override var inputView: UIView? {
    return _inputView
}

override var inputAccessoryView: UIView? {
    return _inputAccessoryToolbar
}

required init() {
    super.init(frame: CGRect.zero)

    let doneButton = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.plain, target: self, action: #selector(doneClick))
    let spaceButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.flexibleSpace, target: nil, action: nil)

    _inputAccessoryToolbar.setItems([ spaceButton, doneButton], animated: false)

    let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(launchPicker))
    self.addGestureRecognizer(tapRecognizer)
}

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
}



override var canBecomeFirstResponder: Bool {
    return true
}

@objc private func launchPicker() {
    becomeFirstResponder()
}

@objc private func doneClick() {
    resignFirstResponder()
}
}

自定义标题类：-

class DetailHeader : UICollectionReusableView
{

@IBOutlet weak var paramName : UILabel!

@IBOutlet weak var paramDate : DatePickerLabel!

}

我的视图控制器代码 -

func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
    if (kind == UICollectionElementKindSectionHeader){
    let sectionHeader = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: headerreuseIdentifier, for: indexPath) as! DetailHeader
    sectionHeader.paramName.text = selectedParam?.name
        sectionHeader.paramDate.text = dateToString(date: stringToDate(strdate: (detailList?.date)!))
        sectionHeader.paramDate = DatePickerLabel()
    return sectionHeader
}
}

标签： iosxcodeswift4

解决方案

您尚未在DatePickerLabel. isUserInteractionEnabled默认值为false。所以在你的覆盖它DatePickerLabel

override var isUserInteractionEnabled: Bool {
    return true
}

你init也永远不会被调用。因为在 Nib/Storyboard 的情况下，init(coder aDecoder: NSCoder)被调用。将您的代码从 init 移至init(coder aDecoder: NSCoder)，它将开始工作。

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