ios - Swift - UIPickerView 崩溃应用程序没有错误

Question

我已将自定义 UITableViewCell 子类化，并在其中安装了 UIPickerView。我已经连接了我的 IBOutlet，以及数据源和委托(delegate)。但是，无论何时要显示单元格，应用程序都会崩溃(控制台窗口中没有任何错误)。知道发生了什么事吗？下面是自定义 UITableViewCell 的代码...

   import UIKit

   class OptionPickerTableViewCell: UITableViewCell, UIPickerViewDataSource, UIPickerViewDelegate {

  //  MARK: - Variables

  let height: CGFloat = 160
  var options: [String] = [String]()

  //  MARK: - IBOutlets

  @IBOutlet weak var pickerView: UIPickerView!

  //  MARK: Functions

  func setCell(options: [String]) {
    self.options = options

  }     

  //  MARK: - UIPickerViewDelegate

  func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
    return options[row]
  }

  //  MARK: - UIPickerViewDataSource

     func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int                                   {   
    return 1
  }

  func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
    return options.count
  }

}

更新:

收到的错误代码是:

Getting the errors: 2015-07-09 13:21:39.924 Gym Assist[12610:473411] -[NSObject numberOfComponentsInPickerView:]: unrecognized selector sent to instance 0x7fa62c828ad0 2015-07-09 13:21:39.931 Gym Assist[12610:473411] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSObject numberOfComponentsInPickerView:]: unrecognized selector sent to instance 0x7fa62c828ad0'

Answer 1

您的项目正在崩溃，因为您为 PickerView 分配了错误的委托(delegate)和数据源。

所以删除它并将其添加到自定义单元格类的 awakeFromNib 方法中:

override func awakeFromNib() {
    super.awakeFromNib()

    pickerView.dataSource = self
    pickerView.delegate = self

}