Swift 2.1 - UIPickerView 不能正常工作

Question

我用的是最新版的Xcode，也是最新版的Swift。我按照此 link 的步骤进行操作，但 pickerview 没有出现在模拟器中。代码如下。有人可以帮我检查一下吗？非常感谢！

import UIKit

class ViewController: UIViewController, UIPickerViewDelegate {

@IBOutlet var imageView: UIImageView!

@IBOutlet var infoLabel: UILabel!

@IBOutlet var picker: UIPickerView!

//var fruits: [String] = [String]()
var fruits = ["Pick a fruit" , "Apples" , "Oranges" , "Lemons" , "Blueberries"]

override func viewDidLoad() {
    super.viewDidLoad()
    imageView.image = UIImage(named: "fruit.jpg")
   // picker.delegate = self

    // Do any additional setup after loading the view, typically from a nib.
}

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



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


func pickerView(pickeView: UIPickerView, numberOfRowsInCompoment component: Int) ->Int{
    return 5
}

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

func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int){

    var fruitSelected = fruits[row]

    switch (fruitSelected){
    case "Apples":
        imageView.image = UIImage(named: "apple.jpg")
        infoLabel.text = "These apples are red"

    case "Oranges":
        imageView.image = UIImage(named: "orange.jpg")
        infoLabel.text = "These oranges are yellow"

    case "Lemons":
        imageView.image = UIImage(named: "Lemon.jpg")
        infoLabel.text = "These lemons are green"

    case "Blueberries":
        imageView.image = UIImage(named: "Blueberry.jpg")
        infoLabel.text = "These blueberries are blue"

    default:
        imageView.image = UIImage(named: "fruit.jpg")
        infoLabel.text = "Pick a fruit"
    }
  }
}

Answer 1

假设您已在情节提要中正确设置委托和数据源，您的问题是方法签名不正确。请注意您的方法签名中的拼写错误 (pickeView: UIPickerView, numberOfRowsInCompoment component: Int)。 pickeView 中缺少 r，numberOfRowsInCompoment 中使用 m 而不是 n。

试试下面的函数，你应该已经准备好了...

func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) ->Int{
    return 5
}

Swift 2.1 - UIPickerView 不能正常工作

Swift 2.1 - UIPickerView doesn't work well

uipickerview

ios

xcode7

swift2