create view and switch view

pageView扩展backbone

cAbstractApp定义view加载、切换、回退、跳转—webApp/cWebViewApp/hybirdApp为其子类

1、cWebApp扩展了父类的bindEvents,start,goTo,goBack,jump,judgeForward
2、webviewApp扩展了父类的bindEvents,_getCurrentView,start,goTo,goBack,startObserver,endObserver,judgeForward
3、hybridApp扩展了父类的bindEvents,start,loadFromRoute,_getCurrentView,goTo,goBack,jump,startObserver,endObserver,judgeForward
cBaseInit根据Lizard.pdConfig返回实例化abstractApp的方法。
不同环境加载的文件:
在APP，但不是hybrid方式：加载cHybridAppInit、cStatic、cBaseInit
Hybrid：加载cHybridAppInit、cBaseInit
其他方式：cWebAppInit

/**cWebInit的作用

• define([‘cBaseInit’, ‘cWebMember’], function(initFunc, Member){
  Member.autoLogin({
  callback: function(){
  require([‘cStatic’], function(){

  initFunc()
  

  });
  }
  });
  })
  */
  一、backbone view的实现
  

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  /** * backbone view构造函数， * @param {[type]} options [description] */ var viewOptions = ['model', 'collection', 'el', 'id', 'attributes', 'className', 'tagName', 'events']; var View = Backbone.View = function(options) { this.cid = _.uniqueId('view'); options || (options = {}); _.extend(this, _.pick(options, viewOptions)); this._ensureElement(); this.initialize.apply(this, arguments); };

  1、_.uniqueId(‘c/view’)生成唯一cid；
  2、配置参数options；
  3、创建View实例；
  4、初始化。

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_.extend(View.prototype, Events, { // view的默认标签 tagName: 'div', // 重定义$方法，在当前view查找元素 $: function(selector) { return this.$el.find(selector); }, // 初始化 initialize: function(){}, /** * * @return {[type]} [description] */ render: function() { return this; }, /** * _ensureElement 创建View结构 * this._createElement：创建View结构 * this.setElement：对DOM元素进行事件解绑，定义this.$el与this.el，绑定 */ _ensureElement: function() { if (!this.el) { var attrs = _.extend({}, _.result(this, 'attributes')); if (this.id) attrs.id = _.result(this, 'id'); if (this.className) attrs['class'] = _.result(this, 'className'); this.setElement(this._createElement(_.result(this, 'tagName'))); this._setAttributes(attrs); } else { this.setElement(_.result(this, 'el')); } }, _createElement: function(tagName) { return document.createElement(tagName); }, _setAttributes: function(attributes) { this.$el.attr(attributes); }, /** * 对View的DOM进行定义与事件处理 */ setElement: function(element) { this.undelegateEvents(); this._setElement(element); this.delegateEvents(); return this; }, /** * Backbone.$ = $ * el是Backbone.$的实例 */ _setElement: function(el) { this.$el = el instanceof Backbone.$ ? el : Backbone.$(el); this.el = this.$el[0]; }, /** * events格式为{"event selector": "callback"} * 循环events，如果method不是function，取this对象的method属性方法 * 不存在method，跳过此次循环 * match取出evnet与selector，_.bind的用法？？？ */ delegateEvents: function(events) { if (!(events || (events = _.result(this, 'events')))) return this; this.undelegateEvents(); for (var key in events) { var method = events[key]; if (!_.isFunction(method)) method = this[events[key]]; if (!method) continue; // delegateEventSplitter = /^(S+)s*(.*)$/; var match = key.match(delegateEventSplitter); this.delegate(match[1], match[2], _.bind(method, this)); } return this; }, /** * 解除View事件委托，根据.delegateEvents与cid */ undelegateEvents: function() { if (this.$el) this.$el.off('.delegateEvents' + this.cid); return this; }, /** * 为View添加事件委托eventName，根据.delegateEvents与cid */ delegate: function(eventName, selector, listener) { this.$el.on(eventName + '.delegateEvents' + this.cid, selector, listener); }, /** * 解除View事件委托eventName，根据.delegateEvents与cid */ undelegate: function(eventName, selector, listener) { this.$el.off(eventName + '.delegateEvents' + this.cid, selector, listener); }, /** * 移除this.$el，调用Events模块的stopListening */ remove: function() { this._removeElement(); this.stopListening(); return this; }, _removeElement: function() { this.$el.remove(); }, }

二、基于backbone View的扩展
define([‘libs’,’header’, ‘cGuiderService’],
function (libs, Header, Guider) {
var PageView = Backbone.View.extend({
// 滚动条位置
scrollPos: { x: 0, y: 0 },
// 标题组件
header: null,
// web 环境下使用pageid
pageid: 0,
// hybrid 环境下使用hpageid
hpageid: 0,
// 页面切换时，是否要滚动至顶部
scrollZero: true,
// 页面切换时，是否执行onHide
triggerShow: true,
// 页面切换时，是否执行onHide
triggerHide: true,
initialize: function () {
this.id = this.$el.attr(“id”);
this.create();
},
// 生成头部
_createHeader: function () {
var hDom = $(‘#headerview’);
this.header = this.headerview = new Header({ ‘root’: hDom });
},
// create 方法,View首次初始化是调用
create: function () {
//调用子类onCreate
this.onCreate && this.onCreate();
},
// view 销毁方法
destroy: function () {
this.$el.remove();
},
// View 显示时调用的方法
show: function () {
// fix ios 页面切换键盘不消失的bug
document.activeElement && document.activeElement.blur();
//生成头部
this._createHeader();
//调用子类onShow方法
!this.switchByOut && this.$el.show();

    this.triggerShow && this.onShow && this.onShow();

    if (this.onBottomPull) {
      this._onWidnowScroll = $.proxy(this.onWidnowScroll, this);
      this.addScrollListener();
    }

    if (this.scrollZero) {
      window.scrollTo(0, 0);
    }

    this.triggerShow = true;
    this.triggerHide = true;

    //如果定义了addScrollListener,说明要监听滚动条事,此方法在cListView中实现
    this.addScrollListener && this.addScrollListener();
  },
  // View 隐藏
  hide: function () {
    //调用子类onHide方法
    this.triggerHide && this.onHide && this.onHide();
    this.removeScrollListener && this.removeScrollListener();
    this.$el.hide();
  },

  // 跨频道跳转
  jump: function (opt) {
    if (_.isString(opt)) {
      window.location.href = opt;
    } else {
      Guider.jump(opt);
    }
  },
  // 前进
  forward: function (url, opt) {
    Lizard.forward.apply(null, arguments);
  },
  // 回退至前一页面
  back: function (url, opt) {
    Lizard.back.apply(null, arguments);
  },
  // 刷新页面
  refresh: function () {

  },
  turning: function(){

  },
  // 唤醒App,要求返回一个app接受的字符串
  getAppUrl: function () {
    return "";
  },
  // 返回URL中参数的值
  getQuery: function (key) {
    return Lizard.P(key);
  },
  // 保存滚动条位置
  saveScrollPos: function () {
    this.scrollPos = {
      x: window.scrollX,
      y: window.scrollY
    };
  },

  // 恢复原滚动条位置
  restoreScrollPos: function () {
    window.scrollTo(this.scrollPos.x, this.scrollPos.y);
  },
  // 获得页面Url,hyrbid会增加一个虚拟域名
  _getViewUrl: function () {
    var url = this._hybridUrl(location.href);
    return url;
  },

  _hybridUrl: function(url) {
    if (Lizard.isInCtripApp)
    {
      return 'http://hybridm.ctrip.com' + this.$el.attr('page-url');
    } else {
      return url;
    }
  }
})
return PageView;

});

三、view调用与切换：

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// cPageModelProcessor负责处理viewCache define(['cPageModelProcessor', 'cUtilPerformance', 'cUtilCommon', 'UILoadingLayer', (Lizard.isHybrid || Lizard.isInCtripApp) ? 'cHybridHeader' : 'UIHeader', 'UIWarning404', 'UIAlert', 'UIToast', 'cMessageCenter', 'UIAnimation', 'cPageParser'], function (callModels, cperformance, utils, Loading, Header, Warning404, Alert, Toast, MessageCenter, animation) { // cBaseInit实例化app，循环调用interface function (options) { this.initialize(options) } APP.subclasses = [], APP.defaults = { "mainRoot": '#main', "header": 'header', "viewport": '.main-viewport', "animForwardName": 'slideleft', "animBackwardName": 'slideright', "isAnim": false, //是否开启动画 "maxsize": 10 } APP.prototype = { ctnrViewNames: ['lizardHisCtnrView'], // 订阅viewReady viewReady: function (handler) { //TODO subscribe viewReady message MessageCenter.subscribe('viewReady', handler); }, initProperty: function initProperty(options) { var opts = _.extend({}, APP.defaults, options || {}); return opts; }, bindEvents: function () { //l_wang提升响应速度 $.bindFastClick && $.bindFastClick(); //处理a标签 this._handleLink(); }, initialize: function initialize(options) { // 初始化配置 var opts = 大专栏  create view and switch viewclass="keyword">this.initProperty(options); this.options = opts; this.firstState = null; this.mainRoot = $(opts.mainRoot); this.header = $(opts.header); this.viewport = this.mainRoot.find(opts.viewport); this.curView = null; this.lastView = null; //实例化cathViews组件 this.maxsize = opts.maxsize; this.animForwardName = opts.animForwardName; this.animBackwardName = opts.animBackwardName; this.isAnim = opts.isAnim; this.animAPIs = animation; this.animatName = this.animForwardName; // 定义基础UI this._loading = new Loading(); this._alert = new Alert(); this._confirm = new Alert(); this._toast = new Toast(); this._warning404 = new Warning404(); //是否开启hashchange,false为不开启 this.observe = false; this.headerView = new Header({ 'root': $('#headerview') }); // 绑定事件 this.bindEvents(); this.views = {}; this.start(); // 订阅switchview MessageCenter.subscribe('switchview', function (inView, outView) { inView.$el.show(); }, this); }, // 链接跳转处理 _handleLink: function _handleLink() { if (!Lizard.isHybrid && !utils.isSupportPushState) return; $('body').on('click', $.proxy(function (e) { var el = $(e.target); var needhandle = false; while (true) { if (!el[0]) break; if (el[0].nodeName == 'BODY') break; if (el.hasClass('sub-viewport')) break; if (el[0].nodeName == 'A') { needhandle = true; break; } el = el.parent(); } if (needhandle) { var href = el.attr('href'); var opts = {}; var lizard_data = el.attr('lizard-data'); if ((el.attr('lizard-catch') == 'off') || (href && utils.isExternalLink(href))) { return true; } e.preventDefault(); if (lizard_data) { opts.data = JSON.parse(lizard_data); } if (el.attr('data-jumptype') == 'back') { this.back(el.attr('href'), opts); } else if (el.attr('data-jumptype') == 'forward') { this.goTo(el.attr('href'), opts); } } }, this)); }, // 切换view switchView: function switchView(inView, outView) { if (outView && !document.getElementById(outView.id) && (inView && !inView.switchByOut)) { outView.$el.appendTo(this.viewport); outView.$el.hide(); } if (inView && !document.getElementById(inView.id)) { inView.$el.appendTo(this.viewport); inView.$el.hide(); } //inView.$el.show(); //动画切换时执行的回调 var switchFn; //此处有问题，如果inView不再的话，应该由firstState生成默认页面 if (!inView) throw 'inview 未被实例化'; //将T 、P的值重新设置回去 Lizard.T.lizTmpl = inView.lizTmpl; Lizard.P.lizParam = inView.lizParam; //outView不存在的情况下就不释放动画接口 if (outView) { outView.saveScrollPos(); if (this.isAnim) { switchFn = this.animAPIs[this.animatName]; } //switchFn = this.animAPIs[this.animatName]; //未定义的话便使用默认的无动画 //l_wang 此段代码需要做一个包裹，或者需要回调，否则不会执行应该执行的代码!!! inView.fromView = outView.config.viewName; if (_.indexOf(this.ctnrViewNames, inView.config.viewName) > -1) { MessageCenter.publish('showHisCtnrView'); outView.hideWarning404 = function () { Lizard.goBack(); } } if (switchFn && _.isFunction(switchFn)) { switchFn(inView, outView, $.proxy(function (inView, outView) { this._onSwitchEnd(inView, outView); }, this)); } else { inView && !inView.switchByOut && outView.hide(); inView.show(); this._onSwitchEnd(inView, outView); } } else { //这里开始走view的逻辑，我这里不予关注 if (_.indexOf(this.ctnrViewNames, inView.config.viewName) > -1) { MessageCenter.publish('showHisCtnrView'); } inView.show(); this._onSwitchEnd(inView, outView); } }, //l_wang 既然使用消息机制，就应该全部使用，后期重构 _onSwitchEnd: function (inView, outView) { if (outView != inView && !inView.switchByOut) { setTimeout(function () { outView && outView.$el && outView.$el.hide() }, 10); } inView.sendUbt(true); MessageCenter.publish('viewReady', [inView]); }, showView: function (data) { this.loadView(data.url, data.text, data.options); }, // 根据访问的URL是webapp或者html5不同，响应的数据也不同 // 根据服务器响应的数据，解析路由配置text/lizard-config，加载view loadView: function (url, html, options) { // 显示加载UI if ((Lizard.config && Lizard.config.isHideAllLoading) || options.hideloading) { this.hideLoading(); } else { this.showLoading(); } Lizard.loadingView = true; if (url) { // view是this.curView或者加载新页面 var view = this.curView || { hpageid: '', pageid:'', _getViewUrl: function () { return ""; }, _hybridUrl: function() { if (Lizard.isInCtripApp) { return 'http://hybridm.ctrip.com' + url; } else { return ubtURL; } } }; var ubtURL = window.location.protocol + '//' + window.location.host + (url.indexOf(Lizard.appBaseUrl) == 0?url: Lizard.appBaseUrl + url) if (!window.__bfi) window.__bfi = []; window.__bfi.push(['_unload', { page_id: Lizard.isHybrid?view.hpageid: view.pageid, url: view._hybridUrl(), refer: view.$el?view._hybridUrl(window.location.protocol + '//' + window.location.host + view.$el.attr('page-url')):document.referrer }]); } // cPageParser模块中的方法_initParser，负责找到script中的text/lizard-config // 解析出viewName与controller、参数、模板、pageUrl var pageConfig = Lizard._initParser(url, html); // 根据pageConfig获取models callModels(pageConfig, _.bind(function (datas, pageConfig) { if (_.isFunction(this.judgeForward) && !this.judgeForward(url)) { return; } Lizard.viewHtmlMap[renderObj.config.viewName] = html; this.header.html(renderObj.header); var renderNode = $('<DIV></DIV>').css({display: 'none'}); // 服务端，renderObj？ if (options.renderAt == 'server') { this.hideLoading(); } else { renderNode = $(renderObj.viewport).css({display: 'none'}); } if (renderObj.config.showfake && (!this.views[renderObj.config.viewName] || this.views[renderObj.config.viewName].$el.attr('page-url') != url)) { if (_.isObject(renderObj.config.showfake) && renderObj.config.showfake.hideloading) { this.hideLoading(); } // renderNode与renderObj.viewport及this.viewport Lizard.__fakeViewNode = renderNode.appendTo(this.viewport); // 当前View this.curView && this.curView.$el.hide(); } // 加载controller require([renderObj.config.controller||'cPageView'], _.bind(function (View) { if (_.isFunction(this.judgeForward) && !this.judgeForward(url)) { return; } // 把this.curView存入this.lastView if (this.curView) this.lastView = this.curView; if (renderObj.config.viewName && this.views[renderObj.config.viewName]) { // 把要加载的view，存入this.curView this.curView = this.views[renderObj.config.viewName]; if (this.curView.$el.attr('page-url') != url) { this.curView.$el.remove(); !renderObj.config.showfake && renderNode.appendTo(this.viewport); // 定义view节点 this.curView.$el = renderNode; // 执行pageview中的onCreate this.curView.onCreate && this.curView.onCreate(); this.curView.delegateEvents(); } } else { !renderObj.config.showfake && renderNode.appendTo(this.viewport); // 新的View this.curView = new View({ el: (options.renderAt == 'server') ? this.viewport.children().first() : renderNode }); // 设置view节点上的属性url this.curView.$el.attr('page-url', url); } if (options.renderAt == 'server') renderNode.remove(); // __fakeViewNode?? Lizard.__fakeViewNode = null; // 定义this.curView的属性 this.curView.text = html; _.extend(this.curView, _.pick(renderObj, ['datas', 'config', 'lizTmpl', 'lizParam'])); // switchByOut？？ if (this.curView && this.curView.switchByOut) { var self = this; // 重新定义turning this.curView.turning = function () { this.hideLoading(); // 隐藏上一个view，发布switchview，显示当前view self.lastView && self.lastView.hide(); MessageCenter.publish('switchview', [self.curView, self.lastView]); self.curView.$el.show(); } }else { this.hideLoading(); MessageCenter.publish('switchview', [this.curView, this.lastView]); } this.curView.lastViewId = this.curView.referrer = (this.lastView && this.lastView.config.viewName); this.switchView(this.curView, this.lastView); if (renderObj.config.viewName) { this.views[renderObj.config.viewName] = this.curView; } }, this)) }, this), _.bind(function (datas, errorBack) { this.hideLoading(); var errorData = { callback: function () { this.hideWarning404(); Lizard.goTo(url); }, headData: { title: '网络不给力', back: true, events: { returnHandler: function () { Lizard.back(); } } } }; if (errorBack) errorData = _.extend(errorData, errorBack(datas)); this.showWarning404(_.bind(errorData.callback, this), pageConfig, errorData); }, this)); }, // 显示一个全局遮盖层 showHisCtnrView: function (onShow, onHide, options) { if (!this.curView && !options.pageConfig) return; if (!this.curView && options.pageConfig) options.addToHistory = false; var oldAnimFlag = this.isAnim, oldAnimName = this.animatName; if (this.curView) { this.curView.triggerShow = this.curView.triggerHide = options?(!options.triggerFlag):true; this.curView.triggerHide = options && ('triggerHide' in options) ?(options.triggerHide):true; } this.isAnim = (options && options.isAnim)?true:this.isAnim; if (this.isAnim) { this.animatName = this.animForwardName; } var config = _.clone(options.pageConfig?options.pageConfig:this.curView.config); config.model.apis = []; config.view = { viewport: '' }; config.controller = 'cPageView'; config.viewName = options && options.viewName?options.viewName:'lizardHisCtnrView'; if (_.indexOf(this.ctnrViewNames, config.viewName) == -1) { this.ctnrViewNames.push(config.viewName); } var url = options.pageConfig?options.pageConfig.pageUrl:this.curView.config.pageUrl; if (!options || options.addToHistory !== false) { if (Lizard.isHybrid || Lizard.isInCtripApp) { this.endObserver(); window.location.hash = '/lizardHisCtnrView'; } else { history.pushState({url: url, text: ' <SCRIPT type="text/lizard-config">' + JSON.stringify(config) + '<' + '/SCRIPT>', options: {pushState: true}}, document.title, url); } } this.loadView(url, ' <SCRIPT type="text/lizard-config">' + JSON.stringify(config) + '<' + '/SCRIPT>', { pushState: true, hideloading: true }); if (Lizard.isHybrid || Lizard.isInCtripApp) { setTimeout(_.bind(this.startObserver, this), 1); } var headData = {}; MessageCenter.unsubscribe('showHisCtnrView'); MessageCenter.subscribe('showHisCtnrView', function () { var self = this; this.lizardHisCtnrView = this.curView; this.curView.onShow = function () { if (self.lastView && !_.isEmpty(self.lastView.header.datamodel)) { headData = _.clone(self.lastView.header.datamodel); headData.events.returnHandler = function () { history.back(); }; } this.header.set(headData); onShow && onShow.apply(this, arguments); setTimeout(function(){ self.animatName = self.animBackwardName; }, 10); }; this.curView.onHide = function () { onHide && onHide.apply(this, arguments); setTimeout(function(){ self.isAnim = oldAnimFlag; self.animatName = oldAnimName; }, 10) }; this.curView.show(); }, this) }, // 隐藏遮盖层 hideHisCtnrView: function() { history.back(); }, interface: function () { return { 'viewReady': this.viewReady, // 'showMessage': this.showMessage, // 'hideMessage': this.hideMessage, // 'showConfirm': this.showConfirm, // 'hideConfirm': this.hideConfirm, // 'showWarning404': this.showWarning404, // 'hideWarning404': this.hideWarning404, // 'showToast': this.showToast, // 'hideToast': this.hideToast, // 'showLoading': this.showLoading, // 'hideLoading': this.hideLoading, 'showHisCtnrView': this.showHisCtnrView, 'hideHisCtnrView': this.hideHisCtnrView, "goTo": this.goTo, "goBack": this.goBack, "forward": this.goTo, "back": this.goBack, "go": this.go } } } })