这是我第一次尝试 phonegap helloworld,也是我第一次尝试做单页应用程序。总之,我有一个 index.html 有一个 id 为“子屏幕”的 div。我也有2个按钮。每个按钮都会将 Handlebar 模板加载到该 DIV 中。
问题: 当我启动应用程序时,按钮处理程序会立即按顺序触发(我收到屏幕 1 和屏幕 2 的警报消息)。当我点击按钮时,什么也没有发生,好像事件绑定没有正确完成。
也许我的 javascript 中有错误,但我不知道它是什么!
看我简单的 index.html:
<html>
<head>
<meta charset="utf-8" />
<meta name="format-detection" content="telephone=no" />
<meta name="msapplication-tap-highlight" content="no" />
<!-- WARNING: for iOS 7, remove the width=device-width and height=device-height attributes. See https://issues.apache.org/jira/browse/CB-4323 -->
<meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width, height=device-height, target-densitydpi=device-dpi" />
<link rel="stylesheet" type="text/css" href="css/index.css" />
<script src="js/jquery-2.1.3.min.js"></script>
<script src="js/handlebars-v3.0.1.js"></script>
<title>Hello World</title>
</head>
<body>
<div class="app">
<h1>PhoneGap test</h1>
<div id="deviceready" class="blink">
<p class="event listening">Connecting to Device</p>
<p class="event received">Device is Ready</p>
</div>
<div id="subscreen">This is where we display the subscreens created using the handlebar templates below</div>
<input class='screen1-key' value="Scr1" type="button"/>
<input class='screen2-key' value="Scr2" type="button"/>
<script id="scr1" type="text/x-handlebars-template">
<div class='header'><h1>This is SCREEN 1</h1></div>
</script>
<script id="scr2" type="text/x-handlebars-template">
<div class='header'><h1>This is SCREEN 2</h1></div>
</script>
</div>
<script type="text/javascript" src="cordova.js"></script>
<script type="text/javascript" src="js/index.js"></script>
<script type="text/javascript">
app.initialize();
</script>
</body>
</html>
看我的简单 index.js,我尝试在 Handlebar 的初始化函数中编译我的模板。然后我尝试将 keyup 事件绑定到我的 2 个按钮,单击该按钮时会将模板 1 或 2 加载到 html 页面上的 div 中。
var app = {
// Application Constructor
initialize: function() {
this.bindEvents();
//Kev add handlebars stuff
this.screen1 = Handlebars.compile($("#scr1").html());
this.screen2 = Handlebars.compile($("#scr2").html());
},
bindEvents: function() {
document.addEventListener('deviceready', this.onDeviceReady, false);
},
onDeviceReady: function() {
app.receivedEvent('deviceready');
$('.screen1-key').on('keyup', app.renderScreen1());
$('.screen2-key').on('keyup', app.renderScreen2());
},
// Update DOM on a Received Event
receivedEvent: function(id) {
var parentElement = document.getElementById(id);
var listeningElement = parentElement.querySelector('.listening');
var receivedElement = parentElement.querySelector('.received');
listeningElement.setAttribute('style', 'display:none;');
receivedElement.setAttribute('style', 'display:block;');
console.log('Received Event: ' + id);
},
renderScreen1: function () {
alert("render screen 1");
$('#subscreen').html(this.screen1());
},
renderScreen2: function () {
alert("render screen 2");
data = {name: "Mr Wong"};
$('#subscreen').html(app.screen2(data));
}
};