tibame.com iOS Swift 界面元件 3 - PickerView

README.md

實作一個 PickerView，可以選取滾輪內容，讀取顯示在螢幕上。

在 Storyboard 要完成：

• UILabel
• UIPickerView

ViewController.swift

//
//  ViewController.swift
//  PickerView
//
//  Created by Edward Chiang on 02/11/2016.
//  Copyright © 2016 TKU. All rights reserved.
//

import UIKit

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
    
    var dataArray = [String]()
    
    @IBOutlet weak var resultLabel: UILabel!
    @IBOutlet weak var pickerView: UIPickerView!
    
    override func awakeFromNib() {
        dataArray = ["Apple", "Banna", "Orange"]
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        // 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.
    }

    @IBAction func pickerClicked(_ sender: Any) {
        
        self.resultLabel.text = dataArray[self.pickerView.selectedRow(inComponent: 0)]
    }
    
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return dataArray[row]
    }
    
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return dataArray.count
    }
    
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }
}