論 Swift 開發入門 : 進度條（UIProgressView）

標籤：ios   swift   進度條   uiprogressview   

轉載請聲明出處：http://blog.csdn.net/jinnchang/article/details/44802019
------------------------------------------------------------------------------------------
概述
------------------------------------------------------------------------------------------
程式碼範例

import UIKitclass ViewController: UIViewController {        var button: UIButton!    var progressView: UIProgressView!        var timer: NSTimer!    var remainTime = 100        override func viewDidLoad() {        // 初始化按鈕，開始倒計時        button = UIButton.buttonWithType(.System) as UIButton        button.frame = CGRectMake(self.view.frame.width/2 - 50, 50, 100, 50)        button.setTitle("開始", forState: UIControlState.Normal)        button.addTarget(self, action: "buttonAction", forControlEvents: UIControlEvents.TouchUpInside)                // 初始化 progressView        progressView = UIProgressView(progressViewStyle: UIProgressViewStyle.Bar)        progressView.frame = CGRectMake(self.view.frame.width/2 - 50, 200, 100, 100)        // 設定初始值        progressView.progress = 1.0        // 設定進度條顏色        progressView.progressTintColor = UIColor.blueColor()        // 設定進度軌跡顏色        progressView.trackTintColor = UIColor.greenColor()        // 擴充：可以通過 progressImage、trackImage 屬性自訂出個性進度條                self.view.addSubview(button)        self.view.addSubview(progressView)    }        /// 響應按鈕點擊事件，開始倒計時    func buttonAction() {        button.enabled = false        timer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector: "timerAction", userInfo: nil, repeats:true)        timer.fire()    }        // 每秒定時觸發    func timerAction() {        if(remainTime < 0){            //倒計時結束            timer.invalidate()        } else {            println("\(remainTime)")            remainTime = remainTime - 1            let progressValue = Float(remainTime)/100            progressView.setProgress(progressValue, animated:true)        }    }    }

------------------------------------------------------------------------------------------
結語GitHub 上項目地址：UIProgressViewSample

文章最後更新時間：2015年4月1日09:08:34。參考資料如下：

UIProgressView Class Reference

UIKit User Interface Catalog: Progress Views

論 Swift 開發入門 : 進度條（UIProgressView）