//

// ViewController.swift

// UILabelTest

//

// Created by mac on 15/6/23.

// Copyright (c) 2015年 fangyuhao. All rights reserved.

//

import UIKit

class ViewController: UIViewController,UIWebViewDelegate,UITextFieldDelegate{

@IBOutlet weak var btngo: UIButton!

@IBOutlet weak var webview: UIWebView!

@IBOutlet weak var txturl: UITextField!

var loadIndicator:UIActivityIndicatorView!

//进度条计时器

var ptimer:NSTimer!

//进度条控件

var progBar:UIProgressView!

override func viewDidLoad() {

    super.viewDidLoad()

    self.webview.delegate = self

    loadIndicator = UIActivityIndicatorView(frame: CGRectMake(100, 100, 32, 32))

    loadIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray

    self.view.addSubview(loadIndicator)

    txturl.delegate = self

    //构建浏览器工具条

    setupBrowserToolbar()

}

func setupBrowserToolbar(){

    //创建一个浏览器工具条，并设置它的大小和位置

    var browserToolbar = UIToolbar(frame: CGRectMake(0, 20, 320, 44));

    //将工具条添加到当前应用的界面中

    self.view.addSubview(browserToolbar)

    //创建图片工具条，但是不是直接使用文件名，

    var path = NSBundle.mainBundle().pathForResource("back", ofType: "png")

    var urlStr = NSURL.fileURLWithPath(path!)

    var data = NSData(contentsOfURL:urlStr!)

    var btnback = UIBarButtonItem(image: UIImage(data: data!), style: UIBarButtonItemStyle.Bordered, target: self, action: Selector("backClicked:"))

    //第一个分隔按钮

    var btngap1 = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target:nil, action: nil)

    //创建前进按钮

    var btnforward = UIBarButtonItem(image: UIImage(named: "forward.png"), style: UIBarButtonItemStyle.Plain, target: self, action: Selector("forwardClicked:"))

    //第二个分隔按钮

    var btngap2 = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil)

    //创建重新加载按钮

    var btnreload = UIBarButtonItem(image: UIImage(named: "reload.png"), style: UIBarButtonItemStyle.Plain, target: self, action: Selector("reloadClicked:"))

    var btngap3=UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace,target: nil, action: nil)

    //创建加载停止按钮

    var btnstop = UIBarButtonItem(image: UIImage(named: "stop"), style: UIBarButtonItemStyle.Plain, target: self, action: Selector("stopClicked:"))

    //第四个分隔按钮

    var btngap4=UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace,target: nil, action: nil)

    //创建进度工具条

    progBar = UIProgressView(progressViewStyle: UIProgressViewStyle.Bar)

    //设置UIProgressview的大小

    progBar.frame = CGRectMake(0, 0, 80, 20)

    //设置该进度条的初始进度为0

    progBar.progress = 0

    //创建使用UIView的自定义的UIBarButtonItem

    var btnprog = UIBarButtonItem(customView: progBar)

    //为工具条设置工具按钮

    browserToolbar.setItems([btnback,btngap1,btnforward,btngap2,btnreload,btngap3,btnstop,btngap4,btnprog], animated: true)

    //创建计时器对象

    ptimer = NSTimer.scheduledTimerWithTimeInterval(0.2, target: self, selector: Selector("loadProgress"), userInfo: nil, repeats: true)

    ptimer.invalidate()

}

func stopClicked(sender:UIBarButtonItem){

    webview.stopLoading()

}

func reloadClicked(sender:UIBarButtonItem){

    webview.reload()

}

func backClicked(sender:UIBarButtonItem){

    webview.goBack()

}

func forwardClicked(sender:UIBarButtonItem){

    webview.goForward()

}

func textFieldShouldReturn(textField: UITextField) -> Bool {

    txturl.resignFirstResponder()

    println("url Changed!")

    var url = txturl.text

    loadUrl(url)

    return true

}

func loadUrl(url:String){

    var urlobj = NSURL(string: url)

    var request = NSURLRequest(URL: urlobj!)

    webview.loadRequest(request)

}

@IBAction func goClicked(sender: UIButton) {

    txturl.resignFirstResponder()

    var url = txturl.text

    loadUrl(url)

}

override func didReceiveMemoryWarning() {

    super.didReceiveMemoryWarning()

}

func webViewDidStartLoad(webView: UIWebView) {

    progBar.setProgress(0, animated: false)

    ptimer.fire()

    loadIndicator.startAnimating()

}

func webViewDidFinishLoad(webView: UIWebView) {

    loadIndicator.stopAnimating()

    progBar.setProgress(1, animated: true)

    ptimer.invalidate()

}

func loadProgress(){

    //如果进度满了，停止计时器

    if(progBar.progress>=1.0){

        //停用计时器

        ptimer.invalidate()

    }else{

        //改变进度条的进度值

        progBar.setProgress(progBar.progress+0.02, animated: true)

    }

}

func webView(webView: UIWebView, didFailLoadWithError error: NSError) {

    var alertview = UIAlertView()

    alertview.title = "出错"

    alertview.message = error.localizedDescription

    alertview.addButtonWithTitle("确定")

    alertview.show()

}

}