[英]uncaught TypeError: Cannot call method 'replace' of undefined backbone.js
[英]Backbone.js - Uncaught TypeError: Cannot call method 'receivedEvent' of undefined
我正在為我的項目使用bone.js。 在瀏覽器上運行項目時出現此錯誤。
Uncaught TypeError: Cannot call method 'receivedEvent' of undefined
我的密碼
define(['jquery', 'underscore', 'backbone', 'model/username/usernameModel', 'text!modules/home/homeViewTemplate.html'], function($, _, Backbone, usernameModel, homeViewTemplate) {
var HomeView = Backbone.View.extend({
initialize: function() {
this.bindEvents();
},
// Bind Event Listeners
//
// Bind any events that are required on startup. Common events are:
// 'load', 'deviceready', 'offline', and 'online'.
bindEvents: function() {
document.addEventListener('deviceready', this.onDeviceReady, false);
},
// deviceready Event Handler
//
// The scope of 'this' is the event. In order to call the 'receivedEvent'
// function, we must explicity call 'app.receivedEvent(...);'
onDeviceReady: function() {
app.receivedEvent('deviceready');
},
// Update DOM on a Received Event
receivedEvent: function(id) {
var parentElement = document.getElementById(id);
var listeningElement = parentElement.querySelector('.listening');
var receivedElement = parentElement.querySelector('.received');
listeningElement.setAttribute('style', 'display:none;');
receivedElement.setAttribute('style', 'display:block;');
console.log('Received Event: ' + id);
},
events: {
"click #nextButton": "next",
"click #resetButton": "resetPassword"
},
next: function(event) {
window.location.replace("#login");
},
resetPassword: function() {
window.location.replace("#reset");
},
render: function() {
this.$el.html(homeViewTemplate);
}
});
return HomeView;
});
我在這里定義了我的應用
require.config({
//path mappings for module names not found directly under baseUrl
paths: {
jquery: 'vendor/jqm/jquery_1.7_min',
jqm: 'vendor/jqm/jquery.mobile-1.1.0',
underscore: 'vendor/underscore/underscore_amd',
backbone: 'vendor/backbone/backbone_amd',
text: 'vendor/require/text',
cordova: 'vendor/phoneGap/cordova',
wikitudePlugin: 'vendor/wikitude/WikitudePlugin',
plugin: 'plugin',
initOptions: 'initOptions',
main: 'main',
messages: 'messages',
templates: '../templates',
modules: '../modules',
model: '../model'
},
shim: {
'backbone': {
deps: ['underscore', 'jquery'],
exports: 'Backbone'
},
'jquery': {
exports: '$'
},
'jqm': {
deps: ['jquery'],
exports: '$'
},
'initOptions': {
deps: ['jquery'],
exports: '$'
},
'main': {
deps: ['jquery'],
exports: '$'
},
'messages': {
deps: ['jquery'],
exports: '$'
},
'cordova': {
deps: ['jquery'],
exports: '$'
},
'wikitudePlugin': {
deps: ['jquery'],
exports: '$'
},
'underscore': {
exports: '_'
},
}
});
//1. load app.js,
//2. configure jquery mobile to prevent default JQM ajax navigation
//3. bootstrapping application
define(['app','jqm-config'], function(app) {
$(document).ready(function() {
console.log("DOM IS READY");// Handler for .ready() called.
});
app.initialize();
});
為什么?
您的HomeView中未定義該app
。 它不知道它是什么(因此,'無法在未定義的方法上調用ReceivedEvent方法。
有幾種方法可以為偵聽器綁定上下文。 您可以讓bindEvents
函數執行以下操作:
bindEvents: function() {
document.addEventListener('deviceready', this.onDeviceReady.bind(this), false);
},
並將onDeviceReady
更改為可與任何app
實例一起使用,因此只需使用this
:
onDeviceReady: function() {
this.receivedEvent('deviceready');
},
define(['app','jqm-config'], function(app) {
document.addEventListener('deviceready', function (e) {
app.receivedEvent();
});
});
嘗試一下,那么您就不必在骨架.view的initialize中設置任何內容,也可以刪除bindEvent()
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