swift 4 中的自定义日期选择器标签

Question

我有一个 collectionview，其中使用了一个标签 header.i 想在这个标签是 clicked.a 时显示一个日期选择器 clicked.a 自定义日期选择器标签已经创建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，因为当前日期选择器在单击日期 header 标签时未显示。

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 header class :-

class DetailHeader : UICollectionReusableView
{

@IBOutlet weak var paramName : UILabel!

@IBOutlet weak var paramDate : DatePickerLabel!

}

我的viewController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
}
}

Answer 1

您尚未在 DatePickerLabel 中启用用户交互。 isUserInteractionEnabled 的默认值为 false。所以在你的 DatePickerLabel

中覆盖它

override var isUserInteractionEnabled: Bool {
    return true
}

您的 init 也从未被调用。因为在Nib/Storyboard的情况下，调用了init(coder aDecoder: NSCoder)。将您的代码从 init 移至 init(coder aDecoder: NSCoder)，它将开始工作。

swift 4 中的自定义日期选择器标签

Custom Datepicker Label in swift 4

xcode

ios

swift4