微信小程序开发(三)模板.docx

微信小程序开发(三)微信小程序开发(三)第三章逻辑层逻辑层向表现层提供数据,(object):注册小程序Object属性方法属性类型说明触发onLaunch()function初始化初始onShow()function显示后转前onHide()function隐藏前转后onError()function出错脚本出错其它any附加个人订制APP()代码实例App({onLaunch:function(options){//Dosomethinginitialwhenlaunch.},onShow:function(options){//Dosomethingwhenshow.},onHide:function(){//Dosomethingwhenhide.},onError:function(msg){(msg)},globalData:'Iamglobaldata'})Options:场景值,详见场景值一章。getApp():创建小程序实例varappInstance=getApp()()//OVALUEDESC11001发现栏71014程序模板131028我的卡包21005搜结果81020公众号模141029卡券310061001+100591022聊天置顶151035公众菜单41007单聊101023安卓图标161036消息卡51008群聊111024Profile页171042好友搜索61011二维码121025一维码181043公众模板注册页面注册页面:page(object)Object属性和方法:NO属性类型说明1dataobject数据2onLoadfunction加载3onReadyfunction就绪4onShowfunction显示5onHidefunction隐藏6onUnloadfunction卸载Object属性和方法:(续上页)NO属性类型说明7onPullDownRefreshfunction下拉刷新8onReachBottomfunction达到底端9onShareAppMessagefunction共享APP消息10其它function代码示例:Page({data:{text:"Thisispagedata."},onLoad:function(options){},onReady:function(){//Dosomethingwhenpageready.},onShow:function(){//Dosomethingwhenpageshow.},onHide:function(){//Dosomethingwhenpagehide.},onUnload:function(){//Dosomethingwhenpageclose.},onPullDownRefresh:function(){//Dosomethingwhenpulldown.},onReachBottom:function(){//Dosomethingwhenpagereachbottom.},onShareAppMessage:function(){//returncustomsharedatewhenusershare.},viewTap:function(){({text:'Setsomedataforupdatingview.'})},customData:{hi:'MINA'}})初始化数据:表现层代码<view>{{text}}</view><view>{{array[0].msg}}</view>逻辑层数据提供Page({data:{text:'初始数据',array:[{msg:'消息1'},{msg:'消息2'}]}})事件处理:表现层事件绑定:<viewbindtap="viewTap">clickme</view>逻辑层事件处理:Page({viewTap:function(){('viewtap')}})生命周期函数:分析模型:表现层+表现层事件+两层关联+逻辑层+逻辑层事件生命周期:产生+存续+消毁视图模型:“泳道”图表现层线程逻辑层线程两层关联startinitedinitstartcreateonLoadcreatedonShowWaitdataWaitnotiF_renderreadyonReadyActiveActiverenderrenderrenderonHideonShowonUnloadActive路由页面栈页面栈对页面管理NO操作内容页面栈变化说明1初始化P_init:in2打开新页面P_open:in3重定向P_cur:out;p_redirect:in4页面返回P_top:out;p_return:top5TAB切换P_all:out;p_