PS:回家发现代码没拷贝回来,明天继续吧。。。

开始之前先扯点其它的,我上午去理发,居然才7元,但是那个阿妈给我搞成和尚的造型了,我想说点什么,但转念一想节约点洗头水也好!!!

PS:其实主要原因是我掉头发。。。。。。

好了,接昨天的内容:【单页应用】一起来单页应用吧,实现简单微博功能!(上)

昨天我们一起准备了两大核心,继承与view,虽说有问题,而且必定有问题,但是我们暂时不管他。

我们先继续先往下面写,到最后整体流程拉通后再一起优化就好,现在去纠结也不一定有结果,于是我们开始吧。

继承之实现APP

我们这里APP要干的事情,与其说担任MVC中控制器的角色,不如说他就是充当了一下路由选择的角色,根据不同的URL导向不同的view,并且会管理hash。

由于我们会处理request请求,压入hash以达到后退功能有效,所以这里先来实现一个hash类吧

实现Hash对象

先来一个辅助函数,用于计算某个字符在数组的位置:

 1 var indexOf = function (k, arr) {
 2     if (!arr) {
 3         return -1;
 4     }
 5     //若是对象本身便居然indexof,便使用自身的,比如字符串
 6     if (arr.indexOf) {
 7         return arr.indexOf(k);
 8     }
 9     for (var i = 0, len = arr.length; i < len; i++) {
10         if (arr[i] == k) {
11             return i;
12         }
13     }
14     return -1;
15 };

PS:这个hash的实现不算太好,后面也许会改动

 1 b.Hash = b.Class({
 2     _propertys_: function () {
 3         this.keys = [];
 4         this.values = [];
 5     },
 6     init: function (obj) {
 7         (typeof obj == 'object') || (obj = {}); //???
 8         for (var k in obj) {
 9             if (obj.hasOwnProperty(k)) {
10                 this.keys.push(k);
11                 this.values.push(obj[k]);
12             }
13         }
14     },
15     length: function () {
16         return this.keys.length;
17     },
18     getItem: function (k) {
19         var index = indexOf(k, this.keys);
20         if (index < 0) {
21             return null;
22         }
23         return this.keys[index];
24     },
25     getKey: function (i) {
26         return this.keys[i];
27     },
28     getValue: function (i) {
29         return this.values[i];
30     },
31     add: function (k, v) {
32         return this.push(k, v);
33     },
34     del: function (k) {
35         var index = indexOf(k, this.keys);
36         return this.delByIndex(index);
37     },
38     delByIndex: function (index) {
39         if (index < 0) return this;
40         this.keys.splice(index, 1);
41         this.vaules.splice(index, 1);
42         return this;
43     },
44     //移除栈顶hash,并返回
45     pop: function () {
46         if (!this.keys.length) return null;
47         this.keys.pop();
48         return this.values.pop();
49     },
50     push: function (k, v, order) {
51         if (typeof k == 'object' && !v) {
52             for (var i in k) {
53                 if (k.hasOwnProperty(i)) {
54                     this.push(i, k[i], order);
55                 }
56             }
57         } else {
58             var index = indexOf(k, this.keys);
59             if (index < 0 || order) {
60                 if (order) this.del(k);
61                 this.keys.push[k];
62                 this.values.push[v];
63             } else {
64                 this.values[index] = v;
65             }
66         }
67     },
68     //查找hash表,返回key
69     indexOf: function (v) {
70         var index = indexOf(v, this.vaules);
71         if (index >= 0) {
72             return this.keys[index];
73         }
74         return -1;
75     },
76     each: function (handler) {
77         if (typeof handler == 'function') {
78             for (var i = 0, len = this.length(); i < len; i++) {
79                 handler.call(this, this.keys[i], this.vaules[i]);
80             }
81         }
82     },
83     getObj: function () {
84         var obj = {};
85         for (var i = 0, len = this.length(); i < len; i++) {
86             obj[this.keys[i]] = this.values[i];
87         }
88         return obj;
89     }
90 });

此hash对象基本就是数组的写照,各位可以对照着看,于是我们继续我们的app

app雏形

  1 var Application = new b.Class({
  2     _propertys_: function () {
  3         var scope = this;
  4         this.webRoot = ''; //应用跟目录
  5         this.head = $('head');
  6         this.body = $('body');
  7         this.viewRoot = 'views/'; //视图所在目录
  8         this.defaultView = 'index'; //默认加载视图
  9 
 10         this.request; //请求对象
 11         this.viewPath; //当前请求视图路径,解析request得出
 12         this.mainFrame; //主框架
 13         this.viewPort; //视图框架
 14         this.stateDom; //状态栏
 15 
 16         this.views = new b.Hash(); //views保存浏览器存储的hash
 17         this.curView; //当前视图
 18         this.interface = {}; //提供给视图访问的接口,暂时不管
 19         this.history = []; //历史记录
 20 
 21         //        this.stopListening = false;//是否开启监听
 22 
 23         this.onHashChange = function () {
 24             scope.history.push(window.location.href);
 25             var url = decodeURIComponent(window.location.hash.replace(/^#+/i, '')).toLowerCase();
 26             scope._onHashChange(url);
 27         };
 28 
 29         this.lastHash = '';
 30         this.lastFullHash = '';
 31         this.isChangeHash = false; //hash是否发生变化
 32     },
 33     init: function (opts) {
 34         //为属性赋值
 35         opts = opts || {};
 36         for (var k in opts) {
 37             this[k] = opts[k];
 38         }
 39         this.createViewPort();
 40         this.bindEvent(); //事件绑定
 41     },
 42 
 43     //创建app页面基本框架,此处不能使用id,因为。。。
 44     createViewPort: function () {
 45         var htm = [
 46             '<div class="main-frame">',
 47                 '<div class="main-viewport"></div>',
 48                 '<div class="main-state"></div>',
 49             '</div>'
 50         ].join('');
 51         this.mainframe = $(htm);

 52         this.viewport = this.mainframe.find('.main-viewport');
 53         this.statedom = this.mainframe.find('.main-state');
 54         var body = $('body');
 55         body.html('');
 56         body.append(this.mainframe);
 57     },
 58     //!!!!!!非常重要哦!!!!!!
 59     bindEvent: function () {
 60         var scope = this;
 61         //暂时不使用requireJS
 62         //        requirejs.onError = function () {};
 63         $(window).bind('hashchange', this.onHashChange);
 64     },
 65     _onHashChange: function (url) {
 66         url = url.replace(/^#+/i, '');
 67         var req = this.parseHash(url);
 68 
 69         this.request = req;
 70         this.viewPath = this.viewPath || this.defaultView;
 71         this.loadView(this.viewPath); //!!!重要的视图加载
 72     },
 73     //该方法慢慢看吧。。。
 74     parseHash: function (hash) {
 75         var fullhash = hash,
 76                 hash = hash.replace(/([^\|]*)(?:\|.*)?$/img, '$1'),
 77                 h = /^([^?&|]*)(.*)?$/i.exec(hash),
 78                 vp = h[1] ? h[1].split('!') : [],
 79                 viewpath = (vp.shift() || '').replace(/(^\/+|\/+$)/i, ''),
 80                 path = vp.length ? vp.join('!').replace(/(^\/+|\/+$)/i, '').split('/') : [],
 81                 q = (h[2] || '').replace(/^\?*/i, '').split('&'),
 82                 query = {}, y;
 83         this.isChangeHash = !!(!this.lastHash && fullhash === this.lashFullHash) || !!(this.lastHash && this.lastHash !== hash);
 84         if (q) {
 85             for (var i = 0; i < q.length; i++) {
 86                 if (q[i]) {
 87                     y = q[i].split('=');
 88                     y[1] ? (query[y[0]] = y[1]) : (query[y[0]] = true);
 89                 }
 90             }
 91         }
 92 
 93         this.lastHash = hash;
 94         this.lashFullHash = fullhash;
 95         return {
 96             viewpath: viewpath,
 97             path: path,
 98             query: query,
 99             root: location.pathname + location.search
100         };
101     },
102     //!!!非常重要
103     loadView: function (viewPath) {
104         var id = viewPath;
105         var scope = this;
106         //此处本来应该判断是否已经有该视图,但是我们暂时不管,我们只要加载了相关视图就算成功
107         /*
108         一些操作
109         */
110 
111         //此处应该加载我们的js文件
112         $.getScript(this.buildUrl(viewPath), function () {
113             var view = new PageView();
114             view.show();
115             scope.viewport.append(curView.$el);
116             var s = ''; 
117         });
118         //!!!暂时不使用requireJS
119         //        var self = this;
120         //        requirejs([this.buildUrl(path)], function (View) {
121         //            callback && callback.call(self, View);
122         //        });
123     },
124     buildUrl: function (path) {
125         return this.viewRoot = path;
126     }
127 });

好了,至此,我们粗制滥造版app结束,我们来试试先,再一并讲解其主要流程。

简单测试

html代码:

 1 <!DOCTYPE html>
 2 <html xmlns="http://www.w3.org/1999/xhtml">
 3 <head>
 4     <meta charset="utf-8" />
 5     <title></title>
 6     <script src="res/libs/jquery.js" type="text/javascript"></script>
 7     <script src="res/test/c.base.js" type="text/javascript"></script>
 8 </head>
 9 <body>
10 </body>
11 <script src="res/test/app.js" type="text/javascript"></script>
12 <script type="text/javascript">
13     var app = new Application();
14 
15 </script>
16 </html>

base代码

  1 /// <reference path="../libs/underscore.js" />
  2 
  3 /// <reference path="../libs/jquery.js" />
  4 
  5 /// <reference path="../libs/require.js" />
  6 
  7 /// <reference path="../libs/require.text.js" />
  8 
  9 
 10 
 11 
 12 var b = {};//base
 13 var slice = [].slice;
 14 var indexOf = function (k, arr) {
 15     if (!arr) {
 16         return -1;
 17     }
 18     //若是对象本身便居然indexof,便使用自身的,比如字符串
 19     if (arr.indexOf) {
 20         return arr.indexOf(k);
 21     }
 22     for (var i = 0, len = arr.length; i < len; i++) {
 23         if (arr[i] == k) {
 24             return i;
 25         }
 26     }
 27     return -1;
 28 };
 29 
 30 b.Class = function (supClass, childAttr) {
 31     //若是传了第一个类,便继承之;否则实现新类
 32     if (typeof supClass === 'object') {
 33         childAttr = supClass;
 34         supClass = function () { };
 35     }
 36 
 37     //    var supProto = supClass.prototype;
 38     var newClass = function () {
 39         this._propertys_ && this._propertys_();
 40         this.init && this.init.apply(this, arguments);
 41     };
 42     newClass.prototype = new supClass();
 43 
 44     var supInit = newClass.prototype.init || function () { };
 45     var childInit = childAttr.init || function () { };
 46     var _supAttr = newClass.prototype._propertys_ || function () { };
 47     var _childAttr = childAttr._propertys_ || function () { };
 48 
 49     for (var k in childAttr) {
 50         //_propertys_中作为私有属性
 51         childAttr.hasOwnProperty(k) && (newClass.prototype[k] = childAttr[k]);
 52     }
 53 
 54     //继承的属性有可能重写init方法
 55     if (arguments.length && arguments[0].prototype && arguments[0].prototype.init === supInit) {
 56         //重写新建类,初始化方法,传入其继承类的init方法
 57         newClass.prototype.init = function () {
 58             var scope = this;
 59             var args = [function () {
 60                 supInit.apply(scope, arguments);
 61             } ];
 62             childInit.apply(scope, args.concat(slice.call(arguments)));
 63         };
 64     }
 65 
 66     //内部属性赋值
 67     newClass.prototype._propertys_ = function () {
 68         _supAttr.call(this);
 69         _childAttr.call(this);
 70     };
 71 
 72     //成员属性
 73     for (var k in supClass) {
 74         supClass.hasOwnProperty(k) && (newClass[k] = supClass[k]);
 75     }
 76     return newClass;
 77 };
 78 
 79 b.AbstractView = b.Class({
 80     //基本view应该具有的属性
 81     _propertys_: function () {
 82         this.id = (new Date()).getTime(); //唯一pageID
 83         this.rootBox = $('body'); //视图容器
 84         this.root = $('<div/>'); //视图的根元素,可进行设置
 85         this.header = null;
 86         this.footer = null;
 87         this.template = '';//可能的模板
 88         this.isCreated = false;//是否创建完毕
 89         this.status = b.AbstractView.STATE_NOTCREATE;//当前状态
 90     },
 91     init: function () {
 92     },
 93     //定义将要用到的事件,其中元素选取都会以root为标准,所以使用内部提供函数吧
 94     events: {
 95         'selector,eventType': 'func'
 96     },
 97     //默认属性
 98     attrs: {
 99     },
100     //获取视图元素
101     find: function (selector) {
102         return this.root.find(selector);
103     }, 
104     //创建dom
105     create: function (opts) {
106         if(!this.isCreated && this.status != b.AbstractView.STATE_ONCREATE) {
107             var attr = opts && opts.attr;
108             var html = this.createHtml();
109             this.initRoot(attr);//初始化root
110             this.hide();
111             this.rootBox.append(this.root);
112             this.root.html(html);
113             this.trigger('onCreate');//触发正在创建事件,其实这里都创建完了
114             this.status = b.AbstractView.STATE_ONCREATE;
115             this.isCreated = true;
116             this.bindEvent();
117         }
118     },
119     //呈现/渲染视图
120     show: function (callback) {
121         if(this.status == b.AbstractView.STATE_ONSHOW) {
122             return;
123         }
124         this.create();
125         this.root.show();
126         this.trigger('onShow');
127         this.status = b.AbstractView.STATE_ONSHOW
128         callback && (typeof callback == 'function') && callback.call(this);
129         this.trigger('onLoad');
130     },
131     //隐藏dom
132     hide: function (callback) {
133         if(!this.root || this.status == b.AbstractView.STATE_ONHIDE) {
134             return;
135         }
136         this.root.hide();
137         this.trigger('onHide');
138         this.status = b.AbstractView.STATE_ONHIDE;
139         callback && (typeof callback == 'function') && callback();
140     },
141     //事件绑定
142     bindEvent: function () {
143         var events = this.events;
144         for(var k in events) {
145             var sec_type = k.replace(/\s/i, '').split(',');
146             var func = events[k];
147             if(sec_type &&sec_type.length == 2 && typeof func == 'function') {
148                 var selector = sec_type[0];
149                 var type = sec_type[1];
150                 var scope = this;
151                 this.find(selector).on(type, function () {
152                     func.call(scope, $(this));
153                 })
154             }
155         }
156     },
157     //此处可以配合模板与相关参数组成html
158     //解析模板也放到此处
159     createHtml: function () {
160         throw new Error('请重新定义createHtml方法');
161     },
162     initRoot: function () {
163         var attr = this.attrs;
164         if(!attr) {
165             return;
166         }
167         for(var k in attr) {
168             if(k == 'className') {
169                 this.root.attr('class', attr[k]);
170             }else {
171                 this.root.attr(k, attr[k]);
172             }
173         }
174        this.root.attr('id', this.id);
175     },
176     //触发事件
177     trigger: function (k, args) {
178         var event = this[k];
179         args = args || [];
180         if(event && typeof event == 'function') {
181             event.apply(this, args)
182         }
183     },
184     setRootBox: function (dom) {
185         this.rootBox = dom;
186     },
187     setAttr: function (k, v) {
188         this.root.attr(k, v);
189     },
190     getAttr: function (k) {
191         return this.root.attr(k);
192     },
193     setCss: function (k, v) {
194         this.root.css(k, v);
195     },
196     getCss: function (k) {
197         return this.root.css(k);
198     },
199     //dom创建后执行
200     onCreate: function () {
201 
202     },
203     //dom创建后数据加载时执行,用于加载后执行我们的逻辑
204     onLoad: function () {
205 
206     },
207     //dom创建后,未显示
208     onShow: function () {
209 
210     },
211     //dom隐藏前
212     onHide: function () {
213 
214     }
215 });
216 
217 //组件状态,未创建
218 b.AbstractView.STATE_NOTCREATE = 'notCreate';
219 //组件状态,已创建但未显示
220 b.AbstractView.STATE_ONCREATE = 'onCreate';
221 //组件状态,已显示
222 b.AbstractView.STATE_ONSHOW = 'onShow';
223 //组件状态,已隐藏
224 b.AbstractView.STATE_ONHIDE = 'onHide';
225 
226 b.Hash = b.Class({
227     _propertys_: function () {
228         this.keys = [];
229         this.values = [];
230     },
231     init: function (obj) {
232         (typeof obj == 'object') || (obj = {}); //???
233         for (var k in obj) {
234             if (obj.hasOwnProperty(k)) {
235                 this.keys.push(k);
236                 this.values.push(obj[k]);
237             }
238         }
239     },
240     length: function () {
241         return this.keys.length;
242     },
243     getItem: function (k) {
244         var index = indexOf(k, this.keys);
245         if (index < 0) {
246             return null;
247         }
248         return this.keys[index];
249     },
250     getKey: function (i) {
251         return this.keys[i];
252     },
253     getValue: function (i) {
254         return this.values[i];
255     },
256     add: function (k, v) {
257         return this.push(k, v);
258     },
259     del: function (k) {
260         var index = indexOf(k, this.keys);
261         return this.delByIndex(index);
262     },
263     delByIndex: function (index) {
264         if (index < 0) return this;
265         this.keys.splice(index, 1);
266         this.vaules.splice(index, 1);
267         return this;
268     },
269     //移除栈顶hash,并返回
270     pop: function () {
271         if (!this.keys.length) return null;
272         this.keys.pop();
273         return this.values.pop();
274     },
275     push: function (k, v, order) {
276         if (typeof k == 'object' && !v) {
277             for (var i in k) {
278                 if (k.hasOwnProperty(i)) {
279                     this.push(i, k[i], order);
280                 }
281             }
282         } else {
283             var index = indexOf(k, this.keys);
284             if (index < 0 || order) {
285                 if (order) this.del(k);
286                 this.keys.push[k];
287                 this.values.push[v];
288             } else {
289                 this.values[index] = v;
290             }
291         }
292     },
293     //查找hash表,返回key
294     indexOf: function (v) {
295         var index = indexOf(v, this.vaules);
296         if (index >= 0) {
297             return this.keys[index];
298         }
299         return -1;
300     },
301     each: function (handler) {
302         if (typeof handler == 'function') {
303             for (var i = 0, len = this.length(); i < len; i++) {
304                 handler.call(this, this.keys[i], this.vaules[i]);
305             }
306         }
307     },
308     getObj: function () {
309         var obj = {};
310         for (var i = 0, len = this.length(); i < len; i++) {
311             obj[this.keys[i]] = this.values[i];
312         }
313         return obj;
314     }
315 });
base核心

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