swift - UIPickerView 的错误

Question

我收到这些错误，我什至不知道为什么

1: 类型 View Controller 不符合 UIViewPickerDataSource

2: 方法 pickerview(pickerView:numberOfRowsInComponent:) 的参数名称与要求的不同

这是我的代码!任何帮助将不胜感激。谢谢

import UIKit

class ViewController: UIViewController,UIPickerViewDataSource,UIPickerViewDelegate {

@IBOutlet weak var timePicker: UIPickerView!

var timePickerData:[[Int]] = [[Int]]()

override func viewDidLoad()
{
    super.viewDidLoad()
    
    self.timePicker.delegate = self
    self.timePicker.dataSource = self
    
    timePickerData = [[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51,52,  53, 54, 55, 56, 57, 58, 59], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51,52,  53, 54, 55, 56, 57, 58, 59]]
}

override func didReceiveMemoryWarning()
{
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int
{
    return timePickerData.count
}

// The number of rows of data
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int
{
    return timePickerData[component].count
}

// The data to return for the row and component (column) that's being passed in
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> Int?
{
    return timePickerData[component][row]
}

Answer 1

看起来您使用的是 XCode 8，但您的代码使用旧的 Swift 2.2 UIPickerView API。我的修正建议:

class ViewController: UIViewController,UIPickerViewDataSource,UIPickerViewDelegate {

@IBOutlet weak var timePicker: UIPickerView!

var timePickerData:[[Int]] = [[Int]]()

override func viewDidLoad()
{
    super.viewDidLoad()

    self.timePicker.delegate = self
    self.timePicker.dataSource = self

    timePickerData = [[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51,52,  53, 54, 55, 56, 57, 58, 59], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51,52,  53, 54, 55, 56, 57, 58, 59]]
}

func numberOfComponents(in pickerView: UIPickerView) -> Int {
    return timePickerData.count
}

// The number of rows of data
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int
{
    return timePickerData[component].count
}

// The data to return for the row and component (column) that's being passed in
private func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> Int?
{
    return timePickerData[component][row]
}

}