Swift 简单控件示例：选择器（UIPickerView）

//
//  ViewController.swift
//  UIPickerViewSample
//
//  Created by jinnchang on 15/4/2.
//  Copyright (c) 2015年 Jinn Chang. All rights reserved.
//

import UIKit

class ViewController: UIViewController,UIPickerViewDelegate,UIPickerViewDataSource {
    
    var pickerView: UIPickerView!
    
    var hourLength = 24
    var minuteLength = 60

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view,typically from a nib.
        
        pickerView = UIPickerView(frame: CGRectMake(0,self.view.frame.size.height - 400,self.view.frame.size.width,400))
        pickerView.delegate = self
        pickerView.dataSource = self
        
        self.view.addSubview(pickerView)
    }

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

    // 设置个数
    func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
        return 2
    }
    
    // 设置行数
    func pickerView(pickerView: UIPickerView,numberOfRowsInComponent component: Int) -> Int {
        if(component == 0){
            return hourLength
        }
        if(component == 1){
            return minuteLength
        }
        return 0
    }
    
    // 设置每行具体内容
    func pickerView(pickerView: UIPickerView,titleForRow row: Int,forComponent component: Int) -> String! {
        if(component == 0){
            return "(row)时"
        }
        if(component == 1){
            return "(row)分"
        }
        return nil
    }
    
    // 选中行的操作
    func pickerView(pickerView: UIPickerView,didSelectRow row: Int,inComponent component: Int) {
        if(component == 0){
            println("hour selected: (row)")
        }
        if(component == 1){
            println("minute selected: (row)")
        }  
    }

}

（编辑：李大同）

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