我正在学习JQM和Backbone.js，我遇到了一些问题。我正在制作一个配方应用程序，遵循TODO列表示例，尝试将它们混合在一起。
无论如何，除了第一个页面之外我无法刷新任何页面，我得到未定义的变量。我相信它与DOM和我的许多观点有关。其次在输入搜索查询API的配方后，它首先将结果显示为普通链接！
如果我转发页面或返回页面并返回结果页面，则会显示链接，因为它们应该是JQM样式。这是因为我无法计算JS中的附加方式或内容，所以我在HTML中做了。
我知道这是一个很长的镜头，但任何人都可以给我指导我到底做错了什么，一般的建议，什么？
var Todo = Backbone.Model.extend({
defaults: function() {
return {
id: 0,
title: 'defaultname',
imgUrl: 'defaultimageurl',
order: searchTemp.nextOrder(),
rating: 0,
timeToMake: '',
salty: 0,
sour: 0,
sweet: 0,
bitter: 0,
isPerm: false,
taggedForList: false
};
},
initialize: function(){
if( !this.get('ingrs') ){
this.set({ingrs: new Array()});
}
},
saveModel: function() {
this.set({isPerm: true});
this.save();
}
});
var TodoList = Backbone.Collection.extend({
model: Todo,
localStorage: new Backbone.LocalStorage("searchTemp"),
initialize: function() {
},
nextOrder: function() {
if (!this.length) return 1;
return this.last().get('order') + 1;
},
comparator: 'order',
taggedForList: function() {
return this.where({taggedForList: true});
},
remaining: function() {
return this.without.apply(this, this.taggedForList);
},
findRecipes: function(theQuery) {
console.log("findRecipes called");
searchTemp.each(function (model) {
if (!model.isPerm) {
model.destroy();
}
});
$.ajax({
url: 'http://api.yummly.com/v1/api/recipes?_app_id=d8087d51&_app_key=005af5a16f1a8abf63660c2c784ab65f&maxResult=5&q='+theQuery,
dataType: 'jsonp',
success: function(apiStuff){
var result = new Array();
result = apiStuff; //saves the API's response as a new array
result = result.matches; //trims extra information from the json object, now only has information on the various recipes
$.each(result, function(i, item) {
var anotherRecipe= new Todo(); // makes a new model for each result
anotherRecipe.set({
id: result[i].id, //then sets the attributes
title: result[i].recipeName,
ingrs: result[i].ingredients,
imgUrl: result[i].smallImageUrls,
rating: result[i].rating,
timeToMake: result[i].totalTimeInSeconds,
});
//not all recipes support flavor ratings, so error catching must be used to avoid setting null values
try { anotherRecipe.set({ salty : result[i].flavors.salty }); } catch(e) {anotherRecipe.set({salty : "?"});} //maybe replace the error condition to setting the flavor to '?'
try { anotherRecipe.set({ sour: result[i].flavors.sour }); } catch(e) {anotherRecipe.set({sour : "?"});}
try { anotherRecipe.set({ sweet: result[i].flavors.sweet }); } catch(e) {anotherRecipe.set({sweet : "?"});}
try { anotherRecipe.set({ bitter: result[i].flavors.bitter }); } catch(e) {anotherRecipe.set({bitter : "?"});}
searchTemp.add(anotherRecipe); //adds the model to the temporary
});
} //eventually, should add something that checks for an empty search result, appending some warning if that happens
});
// console.log("search done");
}
});
var ShopItem = Backbone.Model.extend({
defaults: function() {
return {
ingr : 'ingredient',
done : false
}
},
toggle: function() {
this.save({taggedForList: !this.get("taggedForList")});
}
});
var ShopList = Backbone.Collection.extend({
localStorage: new Backbone.LocalStorage("grocery-list"),
generate: function() {
console.log("SHOP LIST! ASSSSSEMMMMBLLLLLLE!");
searchTemp.fetch();
var ingrList = searchTemp.pluck('ingrs'); //this returns an array of arrays
console.log(ingrList);
ingrList = _.union(ingrList); //this needs to get a series of arrays ( _.union(array1, array 2); )
console.log(ingrList);
},
getList: function() {
var list = new Array();
list = this.toJSON();
return list;
}
});
var Todos = new TodoList; //I am afraid to move this, 95% sure its obsolete, though
/*
var savedRecipesView = Backbone.View.extend({
tagName: "li",
initialize: function() {
this.render();
this.listenTo(this.model, 'change', this.render);
this.listenTo(this.model, 'destroy', this.remove);
},
render: function() {
var template = _.template( $("#list_item").html(), {} );
this.$el.html( template );
//this.$el.html(this.template(this.model.toJSON()));
//this.$el.toggleClass('done', this.model.get('done'));
//this.input = this.$('.edit');
//return this;
},
events: {
"click input[type=button]": "sendToGroceries"
},
sendToGroceries: function() {
var temp = new Array();
temp = this.toJSON();
$.each(temp, function(i, item) {
var shopItem = new ShopItem();
shopItem.set({ name: temp[i].title });
shoppingList.add(shopItem); //use pluck [ingrs]
shopItem.save();
});
}
});
*/
window.HomeView = Backbone.View.extend({
template:_.template($('#home').html()),
render:function (eventName) {
$(this.el).html(this.template());
return this;
}
});
window.newSearchView = Backbone.View.extend({
template:_.template($('#newSearch').html()),
//this VAGUELY works, but causes visual chaos the first run through,
//still relies on the appending for that
initialize: function() {
console.log(searchTemp);
//searchTemp.bind('searchDone', this.render, this);
searchTemp.bind('add', this.render, this);
},
render:function (eventName) {
var temp = new Array(); // I think this line isnt doing anyting
results = searchTemp.toJSON();
// console.log(results);
var variables = {
recipes: results
};
$(this.el).html(this.template());
return this;
},
events: {
"keypress #recipe-search": "searchOnEnter",
//add a listener to newSearch to change what's displaye don this list
},
searchOnEnter: function(e) { //the search bar's functionality
if (e.keyCode != 13) return;
var searchin = $("input[id='recipe-search']").val();
console.log("searched for - "+ searchin);
//this function is in todoList, does an API call and
//adds a new model for each result (there will almost always be 5 results)
searchTemp.findRecipes(searchin);
}
});
window.newListView = Backbone.View.extend({
template : _.template($('#newList').html()),
initialize: function() {
},
render:function (eventName) {
recipe = this.model.toJSON(); ///INCOMPLETE, modify newlist to accept straight from JSON
var variables = {
recipe_name : this.model.get("title"),
img_url : this.model.get("imgUrl"),
timetomake: this.model.get("timeToMake"),
ingrs : this.model.get("ingrs"),
rating : this.model.get("rating"),
salty : this.model.get("salty"),
sour : this.model.get("sour"),
sweet : this.model.get("sweet"),
bitter : this.model.get("bitter")
};
$(this.el).html(this.template(variables));
return this;
},
events: {
"click #save-this": "saveModel"
},
saveModel: function() {
console.log("saveModel() called");
//console.log(permStorage.taggedForList());
//shift the model over to permStorage
//searchTemp.remove(this.model);
//console.log(this.model);
this.model.saveModel();
//console.log(this.model)
//now save permStorage to local storage
searchTemp.each(function (model) {
if(model.isPerm) {
model.save();
}
});
}
});
window.savedRecipesView = Backbone.View.extend({
template:_.template($('#savedRecipes').html()),
initialize: function() {
console.log("about to fetch from local storage...");
searchTemp.fetch();
console.log("...fetched!");
},
render:function (data) {
results = searchTemp.toJSON();
//results = results.models;
//console.log(results);
var variables = {
results: results
};
_.each(data, function(task) {
console.log("meow");
this.addOne(task);
}, this);
$(this.el).html(this.template(variables));
return this;
},
addOne: function(task) {
var view = new listItemView({ model:task });
$(this.el).append( view.render().el );
}
});
window.listItemView = Backbone.View.extend({
tagName: 'li',
template:_.template($('#list-item').html()),
initialize: function() {
_.bindAll(this, 'render');
this.model.bind('change', this.render);
this.model.view = this;
},
events: {
"click input[type=button]" : "onClick"
},
render: function() {
$(this.el).html(this.template(this.model.toJSON()));
this.setContent();
return this;
},
onClick: function(){
searchTemp.add(this.model);
console.log("model added to searchTemp, current state of searchTemp:");
console.log(searchTemp);
}
});
window.oldListView = Backbone.View.extend({
template:_.template($('#oldList').html()),
render: function (eventName) {
$(this.el).html(this.template());
return this;
}
});
window.deleteOldView = Backbone.View.extend({
template:_.template($('#deleteOld').html()),
render: function (eventName) {
$(this.el).html(this.template());
return this;
}
});
window.shoppingListView = Backbone.View.extend({
template:_.template($('#shoppingList').html()),
initialize: function() {
shopList.generate();
},
render: function (eventName) {
var variables = {
};
$(this.el).html(this.template(variables));
return this;
}
});
var AppRouter = Backbone.Router.extend({
routes:{
"":"home",
"newSearch":"newSearch",
"newList/:id":"newList",
"savedRecipes":"savedRecipes",
"oldList":"oldList",
"deleteOld":"deleteOld",
"shoppingList":"shoppingList"
},
initialize:function () {
// Handle back button throughout the application
$('.back').live('click', function(event) {
window.history.back();
return false;
});
this.firstPage = true;
},
home:function () {
this.changePage(new HomeView());
},
newSearch:function () {
this.changePage(new newSearchView());
},
newList:function (theID) {
var tempModel = searchTemp.get(theID);
this.changePage(new newListView({
model: tempModel,
id: theID
}));
//console.log(permStorage.taggedForList());
},
savedRecipes:function () {
this.changePage(new savedRecipesView());
},
oldList:function () {
this.changePage(new oldListView());
},
deleteOld:function () {
this.changePage(new deleteOldView());
},
shoppingList:function () {
this.changePage(new shoppingListView());
},
changePage:function (page) {
$(page.el).attr('data-role', 'page');
page.render();
$('body').append($(page.el));
var transition = $.mobile.defaultPageTransition;
// We don't want to slide the first page
if (this.firstPage) {
transition = 'none';
this.firstPage = false;
}
$.mobile.changePage($(page.el), {changeHash:false, transition: transition});
}
});
$(document).ready(function () {
console.log('document ready');
app = new AppRouter();
Backbone.history.start();
searchTemp = new TodoList(); //this stores searched recipes, rename to myRecipes
shopList = new ShopList();
});
<!DOCTYPE html>
<html class="ui-mobile-rendering">
<head>
<title>RECILIST</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="css/jquery.mobile-1.0.1.min.css"/>
<!-- The Templates -->
<script type="text/template" id="home">
<div data-role="header" >
<h1 style="color:black">Recilist Home</h1>
</div>
<img src="store.jpg" id="vege">
<div data-role="content" style="color:red">
<!-- <h3>recilist home page</h3>
<p>Welcome to Recilist!</p>
<p>This is the Home page. </p>
-->
<h1>Save Recipes & <br/>
Create Shopping <br/>
Lists Anywhere</h1>
<p class="blurb">Create and manage your grocery shopping list, FIND and <br/>SAVE your favorite recipes from across the web,<br/> get great SAVINGS and share with your entire family - for FREEEE!!!!</p>
<ul data-role="listview" id="choices" data-inset="true">
<li><a style="color:red" href="#newSearch">Search for new Recipes</a></li>
<li><a style="color:red" href="#savedRecipes">View saved Recipes</a></li>
</ul>
</div>
<div data-role="footer" class="ui-bar" id ="footer">
<h5 style="color:black"> powered by <img src="http://static.yummly.com/api-logo.png"> </h5>
</div>
</script>
<script type="text/template" id="newSearch">
<div data-role="header">
<h1 style="color:black">Search for a new Recipe</h1>
</div>
<div data-role="content">
<input name= "recipe-search" id="recipe-search" data-icon="search" type="text" placeholder="What do you want to cook?">
<ul id="search-list" data-role="listview" data-inset="true">
<% for(var i in results) { %>
<li> <img src="<%= results[i].imgUrl %>"> <a href="#newList/<%= results[i].id%>"><%= results[i].title %> </a> </li>
<% } %>
</ul>
</div>
<img src="list.png" id="list">
<div data-role="footer" class="ui-bar">
<a href="#" data-icon="back" class="back ui-btn-left">Back</a>
<a href="#" data-icon="home">Home</a>
</div>
</script>
<script type="text/template" id="newList">
<div data-role="header">
<h1 style="color:black"> <%=recipe_name%> </h1>
</div>
<div>
<div data-role="content">
<img src= <%=img_url%> >
<h4>Recipe Rating: <%= rating %> </h4>
<h4>Total time to Prepare: <%= timetomake %> </h4>
<h4>Flavor Ratings</h4>
<div class="ui-block-a"> <div class="ui-bar ui-bar-e"> <h4>saltiness</h4> <%= salty %> </div> </div>
<div class="ui-block-b"> <div class="ui-bar ui-bar-e"> <h4>sourness</h4> <%= sour %> </div> </div>
<div class="ui-block-c"> <div class="ui-bar ui-bar-e"> <h4>sweetness</h4> <%= sweet %> </div> </div>
<div class="ui-block-d"> <div class="ui-bar ui-bar-e"> <h4>bitterness</h4> <%= bitter %> </div> </div>
</div>
<div data-role="collapsible" data-collapsed="true">
<h3>Ingredients</h3>
<ul id="ingr-list" data-role="listview" data-inset="true">
<% for(var i in ingrs) { %>
<li><%= ingrs[i] %></li>
<% } %>
</ul>
</div>
<div data-role="content">
<input type="button" id="save-this" data-icon="check" value="save to My Recipies">
<div>
<img src="store3.jpg" id="aisle">
</div>
<div data-role="footer" class="ui-bar">
<a href="#" data-icon="back" class="back ui-btn-left">Back</a>
<a href="#" data-icon="home">Home</a>
</div>
</script>
<script type="text/template" id="savedRecipes">
<div data-role="header">
<h1>My Recipes</h1>
</div>
<div data-role="content">
<p>list of saved recipes, retrieved from local storage</p>
<p>Saved Recipes:</p>
<ul id="search-list" data-role="listview" data-inset="true">
<% for(var i in results) { %>
<li> <img src="<%= results[i].imgUrl %>"> <a href="#newList/<%= results[i].id%>"><%= results[i].title %> </a> </li>
<% } %>
</ul>
<a href="#deleteOld" data-role="button">manage saved recipes</a>
<a href="#shoppingList" data-role="button">generate shopping list</a>
</div>
<div data-role="footer" class="ui-bar">
<a href="#" data-icon="back" class="back ui-btn-left">Back</a>
<a href="#" data-icon="home">Home</a>
</div>
</script>
<script type="text/template" id="deleteOld">
<div data-role="header">
<h1>Delete Recipes</h1>
</div>
<div data-role="content">
<p>select which recipes you wish to delete from local storage</p>
<p>recipes:</p>
<p>(currently lacks functionality to populate this list)</p>
<ul data-role="listview" data-inset="true" id="recipe-list">
</ul>
<input type="button" data-icon="delete" value="delete selected" />
</div>
<div data-role="footer" class="ui-bar">
<a href="#" data-icon="back" class="back ui-btn-left">Back</a>
<a href="#" data-icon="home">Home</a>
</div>
</script>
<script type="text/template" id="oldList">
<div data-role="header">
<h1>---NAME OF THE RECIPE----</h1>
</div>
<div data-role="content">
<p>This is a list of all the ingredients in this recipe</p>
<p>Ingredients:</p>
<ul data-role="listview" data-inset="true">
<li>ingredient 1</li>
<li>ingredient 2</li>
<li>ingredient 3</li>
<li>ingredient 4</li>
</ul>
<p> (button to view the recipe) </p>
</div>
<div data-role="footer" class="ui-bar">
<a href="#" data-icon="back" class="back ui-btn-left">Back</a>
<a href="#" data-icon="home">Home</a>
</div>
</script>
<script type="text/template" id="shoppingList">
<div data-role="header">
<h1>shopping list</h1>
</div>
<div data-role="content">
<ul id="search-list" data-role="listview" data-inset="true">
<% for(var i in results) { %>
<li> <input type="checkbox" name=i id=i class="custom" /></li> <!-- these checkboxes are HIDEOUSLY DEFORMED-->
<label for=i> <%= results[i].title %> </label>
<% } %>
</ul>
</div>
<div data-role="footer" class="ui-bar">
<a href="#" data-icon="back" class="back ui-btn-left">Back</a>
<a href="#" data-icon="home">Home</a>
</div>
</script>
<script type="text/template" id="list-item">
<li>cheese</li>
</script>
<!-- <li> <img src= <%=img_url%> > <a href="#newList/"+ <%=model_id%> +"' class='ui-link-inherit'>" + <%=model_title%> + "</a> </li> -->
<!-- The Scripts -->
<script src="lib/jquery-1.7.1.min.js"></script>
<script src="js/jqm-config.js"></script>
<script src="lib/jquery.mobile-1.0.1.min.js"></script>
<script src="js/underscore.js"></script>
<script src="lib/backbone-min.js"></script>
<script src="js/backbone.localStorage.js"</script>
<script src="js/json2.js"></script>
<script src="js/main.js"></script>
</head>
<body></body>
</html>
答案 0 :(得分：1)
要增强动态创建的列表视图，您需要使用以下内容刷新标记。
$('[data-role=listview]').listview('refresh');