swift - UIPickerView : Toolbar is not visible on UIPickerView

Question

函数 pickerView() 在 ViewLoad 上调用的代码

private func createPickerView(){

    picker = UIPickerView(frame: CGRect(x: 0, y: 0, width: view.frame.width,height: 300))
    picker.showsSelectionIndicator = true
    picker.delegate = self
    picker.dataSource = self

    let toolBar = UIToolbar.init(frame: CGRect(x: 0, y: self.view.frame.size.height -
        picker.frame.size.height-50, width: view.frame.width,height: 50))
    toolBar.barStyle = UIBarStyle.default
    toolBar.tintColor = UIColor(red:14.0/255, green:122.0/255, blue:254.0/255, alpha: 1)
    toolBar.sizeToFit()
    // TODO need to update actions for all buttons

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

    toolBar.setItems([spaceButton, doneButton], animated: false)
    toolBar.isUserInteractionEnabled = true

    senderIdLabel.inputView = picker
    senderIdLabel.inputAccessoryView = toolBar
}

Answer 1

你的 pickerView 高度是概率，不需要为工具栏设置。像这样尝试它正在工作

let picker = UIPickerView(frame: CGRect(x: 0, y: 0, width: view.frame.width,height: 215))
          picker.showsSelectionIndicator = true
          picker.delegate = self
          picker.dataSource = self

          let toolBar = UIToolbar()
          toolBar.barStyle = UIBarStyle.default
          toolBar.tintColor = UIColor(red:14.0/255, green:122.0/255, blue:254.0/255, alpha: 1)
          toolBar.sizeToFit()