一 微信小程序开发工具界面
二 目录结构
第一次进到页面它的目录结构如下:
三 需要注意的问题
(1)添加的新页面文件,都需要在app.json中进行配置,否则页面报错。
(2)工作原理 通过在<view></view>中添加事件 bindtap="btnClick" id="{{n9}}" 相当于click事件。
在js代码中,可以通过this.data.n9获取数据,这些数据的定义都是在js中
通过在<view id="{{btn_a}}"><view>填写id,在具体的函数中,event.target.id去判断id是多少,进行区分。就可以实现,不同标签的点击,然后进行业务逻辑。如果需要访问数据,则是通过this.data.xx。
计算器的wxml页面
-
<view class="content">
-
<view class="xianshi">{{screenNum}}</view>
-
<view class="anniu">
-
<view class="item blue" bindtap="btnClick" id="{{n9}}">9</view>
-
<view class="item blue" bindtap="btnClick" id="{{n8}}">8</view>
-
<view class="item blue" bindtap="btnClick" id="{{n7}}">7</view>
-
<view class="item blue" bindtap="btnClick" id="{{na}}">+</view>
-
</view>
-
<view class="anniu">
-
<view class="item blue" bindtap="btnClick" id="{{n6}}">6</view>
-
<view class="item blue" bindtap="btnClick" id="{{n5}}">5</view>
-
<view class="item blue" bindtap="btnClick" id="{{n4}}">4</view>
-
<view class="item blue" bindtap="btnClick" id="{{nb}}">-</view>
-
</view>
-
<view class="anniu">
-
<view class="item blue" bindtap="btnClick" id="{{n3}}">3</view>
-
<view class="item blue" bindtap="btnClick" id="{{n2}}">2</view>
-
<view class="item blue" bindtap="btnClick" id="{{n1}}">1</view>
-
<view class="item blue" bindtap="btnClick" id="{{nc}}">*</view>
-
</view>
-
<view class="anniu">
-
<view class="item blue" bindtap="btnClick" id="{{n0}}">0</view>
-
<view class="item blue" bindtap="btnClear">AC</view>
-
<view class="item blue" bindtap="btnJs">=</view>
-
<view class="item blue" bindtap="btnClick" id="{{nd}}">/</view>
-
</view>
-
</view>
-
-
Page({
-
-
-
-
-
data: {
-
n0: 0,
-
n1: 1,
-
n2: 2,
-
n3: 3,
-
n4: 4,
-
n5: 5,
-
n6: 6,
-
n7: 7,
-
n8: 8,
-
n9: 9,
-
na: '+',
-
nb: '-',
-
nc: '*',
-
nd: '/',
-
screenNum: 0,
-
screenStr: 0,
-
is_num:1
-
},
-
-
-
-
-
onLoad: function (options) {
-
-
},
-
-
-
-
-
onReady: function () {
-
-
},
-
-
-
-
-
onShow: function () {
-
-
},
-
-
-
-
-
onHide: function () {
-
-
},
-
-
-
-
-
onUnload: function () {
-
-
},
-
-
-
-
-
onPullDownRefresh: function () {
-
-
},
-
-
-
-
-
onReachBottom: function () {
-
-
},
-
-
-
-
-
onShareAppMessage: function () {
-
-
},
-
btnClick:function(event){
-
-
-
var op='';
-
var data=0;
-
var last_is_num = this.data.is_num;
-
-
if (event.target.id == '9' || event.target.id == '8' || event.target.id == '7' || event.target.id == '6' || event.target.id == '5' || event.target.id == '4' || event.target.id == '3' || event.target.id == '2' || event.target.id == '1' || event.target.id == '0') {
-
data = event.target.id;
-
this.setData({ is_num: 1 });
-
}
-
if (event.target.id == '+' || event.target.id == '-' || event.target.id == '*' || event.target.id == '/') {
-
op = event.target.id;
-
this.setData({ is_num: 0 });
-
}
-
if (last_is_num==1){
-
-
if (op == ''){
-
-
if (this.data.screenNum!=0){
-
this.setData({ screenNum: this.data.screenNum + data });
-
this.setData({ screenStr: this.data.screenStr + data });
-
}else{
-
this.setData({ screenNum: data});
-
this.setData({ screenStr: data });
-
}
-
}else{
-
this.setData({ screenNum: this.data.screenNum + op });
-
this.setData({ screenStr: this.data.screenStr +',' +op+',' });
-
}
-
}else{
-
-
if (data != 0) {
-
-
this.setData({ screenNum: this.data.screenNum + data });
-
this.setData({ screenStr: this.data.screenStr + data });
-
} else {
-
return;
-
}
-
}
-
-
-
-
-
},
-
btnJs:function(){
-
console.log(this.data.screenNum);
-
console.log(this.data.screenStr);
-
var result=0;
-
var strs = new Array();
-
strs = this.data.screenStr.split(",");
-
for (var i = 0; i < strs.length; i++) {
-
-
if (strs[i]=='+'){
-
result = parseInt(strs[i - 1]) + parseInt(strs[i+1]);
-
}
-
if (strs[i] == '-') {
-
result = strs[i - 1] - strs[i + 1];
-
}
-
if (strs[i] == '*') {
-
result = strs[i - 1] * strs[i + 1];
-
}
-
if (strs[i] == '/') {
-
result = strs[i - 1] / strs[i + 1];
-
}
-
}
-
console.log('result:'+result);
-
this.setData({ screenNum: result});
-
this.setData({ screenStr: result });
-
},
-
btnClear:function(){
-
-
this.setData({ screenNum: 0 });
-
this.setData({ screenStr: 0 });
-
this.setData({ is_num: 1 });
-
}
-
})
总结,在小程序的布局方面引入了相对单位rpx,需要在学习一下弹性盒子flex布局。对于js部分,和vue.js有些类似,都是对数据进行绑定,简化js的dom操作。这两点还是需要再看看。