win8: hello gril
My first metro app in win8：hello gril
from 官方文档：http://msdn.microsoft.com/en-us/library/windows/apps/hh986964.aspx
看效果：
建一个blank App；先看project 组成：
References：库的引用
css：里面一个default.css 放置样式内容
images：图片文件夹
js：文件夹，里面一个default.js js文件
default.html
Hello Gril_TemporaryKey.pfx
manifest 配置文件
看js的代码：
(function () {"use strict";WinJS.Binding.optimizeBindingReferences = true;var app = WinJS.Application;var activation = Windows.ApplicationModel.Activation;app.onactivated = function (args) {if (args.detail.kind === activation.ActivationKind.launch) {if (args.detail.previousExecutionState !== activation.ApplicationExecutionState.terminated) {// TODO: This application has been newly launched. Initialize// your application here.} else {// TODO: This application has been reactivated from suspension.// Restore application state here. }args.setPromise(WinJS.UI.processAll().then(function completed(){// Retrieve the div that hosts the Rating control.var ratingControlDiv = document.getElementById("ratingControlDiv");// Retrieve the actual Rating control.var ratingControl = ratingControlDiv.winControl;// Register the event handler. ratingControl.addEventListener("change", ratingChanged, false);}));//add button listenervar helloButton = document.getElementById("helloButton");helloButton.addEventListener("click", buttonClickHandle, false);} };app.oncheckpoint = function (args) {// TODO: This application is about to be suspended. Save any state// that needs to persist across suspensions here. You might use the// WinJS.Application.sessionState object, which is automatically// saved and restored across suspension. If you need to complete an// asynchronous operation before your application is suspended, call// args.setPromise(). };function buttonClickHandle(eventInfo) {var username = document.getElementById("nameInput").value;var string = "hi," + username + " you are beautiful!"document.getElementById("greetingOutput").innerText = string;}function ratingChanged(eventInfo) {var ratingOutput = document.getElementById("ratingOutput");ratingOutput.innerText = eventInfo.detail.tentativeRating;}app.start(); })();
一个自执行的匿名方法。里面其实也有相关的生命周期：onactivated，oncheckpoint 。
声明了button的响应方法buttonClickHandle。在onactivated中通过id获取button，再设置监听即可。
html代码：
DOCTYPE html>
<html>
<head><meta charset="utf-8" /><title>Hello_Griltitle><link href="//Microsoft.WinJS.1.0/css/ui-light.css" rel="stylesheet" /><script src="//Microsoft.WinJS.1.0/js/base.js">script><script src="//Microsoft.WinJS.1.0/js/ui.js">script><link href="/css/default.css" rel="stylesheet" /><script src="/js/default.js">script>
head>
<body><h1 class ="headClass">hello , gril!h1><div class ="mainContent"><p>what's your name,gril?p><input id="nameInput" type="text" /><button id="helloButton">say hibutton><div id="greetingOutput">div><label for="ratingControlDiv">Rate this greeting: label><div id="ratingControlDiv" data-win-control="WinJS.UI.Rating">div> <div id="ratingOutput">div>div>
body>
html>
应用了winjs的库。在 中使用了winjs的相关控件。在js中要靠 去连接，并且其是异步的。所以ratingControlDiv控件 的响应就要在WinJS.UI.processAll()异步之后执行。就有了：
args.setPromise(WinJS.UI.processAll().then(function completed(){// Retrieve the div that hosts the Rating control.var ratingControlDiv = document.getElementById("ratingControlDiv");// Retrieve the actual Rating control.var ratingControl = ratingControlDiv.winControl;// Register the event handler. ratingControl.addEventListener("change", ratingChanged, false);}));
最后也瞧瞧css的代码吧：
body { }.headClass {margin-top: 45px;margin-left: 120px;}.mainContent {margin-bottom: 31px;margin-left: 120px;margin-bottom: 10px; }#greetingOutput {height: 30px;margin-bottom: 40px; }@media screen and (-ms-view-state: fullscreen-landscape) { }@media screen and (-ms-view-state: filled) { }@media screen and (-ms-view-state: snapped) { }@media screen and (-ms-view-state: fullscreen-portrait) { }
后半部分是其缺省给的，暂时忽略。
整个开发过程与Android开发其实没多大差别，android的xml组织界面，java控制逻辑。在这里是html/css负责界面，js控制。有生命周期，不过貌似只有三种状态。
over！
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