小程序当中的api
使用
服务器api
调用的类型:
RESTFull API
返回的是 json
SOAP XML
返回的是 XML
使用豆瓣的api
接口:
https://api.douban.com/v2/book/1220562
onLoad: function(event){
wx.request({
url: 'https://api.douban.com/v2/movie/top250',
data: {},
method: 'GET',
head: {
"Content-Type": " "
}
success: function(res){
console.log(res)
},
fail: function(){
console.log("failed")
},
complete: function(){
// complete
}
)}
}
豆瓣top250
的数据https://api.douban.com/v2/movie/top250
点击二选一:
<block wx:for="{{stars}}" wx:for-item="i">
<image wx:if="{{i}}" src=" ... "></image>
<image wx:else src=" ... "></image>
</block>
实现上滑加载更多
<import src="../movie/movie-template.wxml"/>
<scroll-view class="grid-container" scroll-y="true" scroll-x="false" bindscrolltolower="onScrollLower">
<block: wx:for="{{movies}}" wx:for-item="movie">
<view class="single-view-container">
<template is = "movieTemplate" data="{{...movie}}"/>
</view>
</block>
</scroll-view>
.grid-container{
height: 1300rpx;
margin: 40rpx 0 40rpx 6rpx;
}
onScrollLower: function(event){
console.log("加载更多");
}
业务中数据的分离到单独的数据文件中
使用require
方法,用来加载js
模块文件
如:
var a = "dashucoding"
module .exports = {
postList: local_database,
a_key: a
}
然后在要加载的js
文件中添加插入方法:
js
用绝对路径
var postsData = require('../../dashu/dashu.js')
原先:
Page({
data:{
date: "one",
titlle: "...";
},
onLoad:function(options){
this.setData({
// 改为postsData
dashu: postsData
)};
}
)}
Page({
data:{
},
onLoad:function(options){
this.data.postList = postsData.postList
// 已经失效了
}
)}
导入
wxml
统一用:this.setData
template
模板的使用
<template name="postItem">
...
// 模板
</template>
模板的引入:
<import src="dashu/dashu.wxml" />
<block wx:for="{{postList}}" wx:for-item="item" wx:for-index="idx">
<template is="postItem" data="{{item}}" />
</block>
静态使用模板template
进行分析优化
<import src="../movie/movie.wxml" />
<template name="dashu">
...
<template is="dashucoding"/>
</template>
导入
css
@import "dashu/dashu.wxss";
API
豆瓣api
:
App({
globalData:{
doubanBase: "http://t.yushu.im"
}
})
Banner
轮播图跳转文章详情
<view>
<swiper catchtap="onSwiperTap" vertical="{{false}}" indicator-dots="true" autoplay="true" interval="5000">
<swiper-item>
<image id="7" src="..." data-postId="3"></image>
</swiper-item>
<swiper-item>
<image src="..." data-postId="4"></image>
</swiper-item>
<swiper-item>
<image src="..." data-postId="5"></image>
</swiper-item>
</swiper>
<block wx:for="{{postList}}" wx:for-item="item" wx:for-index="idx">
<view catchtap="onPostTap" data-postId="{{item.postId}}">
<template is="postItem" data="{{...item}}"/>
</view>
</block>
</view>
// 点击详情页面
onPostTap: function (event) {
var postId = event.currentTarget.dataset.postid;
wx.navigateTo({
url: "post-detail/post-detail?id=" + postId
})
}
onSwiperTap: function (event) {
// target 和 currentTarget
// target 指的是 当前点击的组件
// currentTarget 指的是 事件捕获的组件
// target 指的是image
// currentTarget 指的是swiper
var postId = event.target.dataset.postid;
wx.navigateTo({
url: "post-detail/post-detail?id=" + postId
})
}
注意比较
Page({
onTap: function(event){
wx.navigateTo({
url: "../posts/post"
)};
wx.redirectTo({
url: "../posts/post"
)};
}
)}
navigateTo
用于保留当前页面,跳转到应用内的某个页面.在tab
选项卡中使用的跳转方法是wx.switchTab
,如果跳转到不带 tab
的选项卡的页面时,用的是redirect
或者navigate
.
redirectTo
用于关闭当前页面,跳转到应用内的某个页面.会导致tabBar
消失.
显示
tabBar
代码:
<template name="dashu">
<view class="stars-container">
...
<view class="stars">
</view>
</view>
<text>8.0</text>
</template>
星星:
.stars {
display: flex;
flex-direction: row;
height: 17px;
margin-right: 24rpx;
margin-top: 6rpx;
}
.stars image {
padding-left: 3rpx;
...;
}
右外边距: margin-right
外边距(margin
)、边框(border
)、内边距(padding
)以及最中间的内容(content
)
// css
@import "stars/stars-template.wxss";
<import src="....wxml" />
<template name="movieListTemplate">
<view class="movie-list-container">
<view class="inner-container">
<view class="movie-head">
<text class="slogan">{{...}}</text>
<view catchtap="onMoreTap" class="more" data-category="{{categoryTitle}}">
...
</view>
</view>
</view>
</template>
justify-content:space-between;
justify-content: center;
/* 居中排列 */
justify-content: flex-start;
/* 从行首起始位置开始排列 */
justify-content: flex-end;
/* 从行尾位置开始排列 */
justify-content: space-between;
/* 均匀排列每个元素,首个元素放置于起点,末尾元素放置于终点 */
justify-content: space-around;
/* 均匀排列每个元素,每个元素周围分配相同的空间 */
justify-content: space-evenly;
/* 均匀排列每个元素,每个元素之间的间隔相等 */
align-content
属性定义为一个弹性盒子容器.
align-content: flex-start;
/* 从起始点开始放置flex元素 */
align-content: left;
/* 从左边开始放置元素 */
align-content: right;
/* 从右边开始放置元素 */
flex-end
:
flex-start
center
space-between
space-around
:
space-evenly
stretch
justify-content
div{
display: flex;
justify-content: space-around;
}
justify-content: flex-start | flex-end | center | space-between | space-around | initial | inherit;
movie-list template
<import src="../movie.xml"/>
<template name="movieList">
<view>
<template is="movieTemplate"/>
</view>
</template>
@import "../movie/movie-template.wxss";
.movie-list {
background-color: #fff;
display: flex;
flex-direction: column;
}
.movie-head {
// 上下左右
padding: 30rpx 20rpx 22rpx;
display: flex;
flex-direction: row;
justify-content: space-around;
}
.more {
float: right;
}
.more-text {
vertical-align: middle;
margin-right: 10rpx;
}
.more-img {
width: 9rpx;
height: 16rpx;
vertical-align: middle;
}
RESTful API
简介及调用豆瓣API
// RESTFul API
// SOAP XML
RESTFul API
请求的url
如下:
https://api.douban.com/v2/book/1220562
,返回值为json
.
图1接口的粒度
fail: function(error) {
console.log(error);
}
图2
<image class="movie-img" src="/images/yourname.jpg"></image>
<import src="../stars/stars-template.wxml"/>
<template name="movie">
<template is="starsTemplate"/>
</template>
<template name="starsTemlate">
...
</template>
function convertToStarsArray(stars){
var num = stars.toString().substring(0,1);
var array = [];
for(var i=1; i<=5; i++){
if(i<num){
array.push(1);
}else{
array.push(0);
}
}
return array;
}
module.exports={
convertToStarsArray: convertToStarsArray
}
// 导入js
var util = require('../../utils/util.js')
<template name="stars">
<view class="stars">
<block wx:for="{{stars}}" wx:for-item="i">
<image wx:if="{{i}}" src="/images/icon/star.png"></image>
<image wx:else src="/images/icon/none-star.png"></image>
</block>
</view>
</template>
<template name="movieTemplate">
<view class="movie-container">
<image class="movie-img" src="{{coverageUrl}}"></image>
<text class="movie-title">{{title}}</text>
<template is="starsTemplate" data="{{stars: stars, score: average}}"/>
</view>
</template>
更多
<view catchtap="onMoreTap" class="more">
<text class="more-text">更多</text>
<image class="more-img" src="/images/icon/arrow-right.png"></image>
</view>
onMoreTap: function(event){
var category = event.currentTarget.dataset.category;
wx.navigateTo({
url: "movie/movie?category=" + category
})
}
data-category="{{categoryTitle}}"
Page({
data: {},
onLoad: function(options){
var category=options.category;
console.log(category);
}
})
动态设置导航标题
// onLoad 页面初始化
wx.setNavigationBarTitle({
title: '豆瓣Top250',
success: function(res){
// success
}
})
当页面准备完毕执行:
onReady: function(event){
wx.setNavigationBarTitle({
title: '豆瓣250',
success: function(res){
// success
}
})
}
Page({
data: {
navigateTitle: "",
},
onLoad: function(options){
var category = options.category;
this.data.navigateTitle = category;
var dataUrl = "";
console.log(category);
switch(category){
case "正在热映":
dataUrl = app.globalData.doubanBase + "";
break;
case "即将上映":
dataUrl = app.globalData.doubanBase + "";
break;
case "豆瓣Top250":
dataUrl = app.globalData.doubanBase + "";
break;
}
},
onReady: function(event){
wx.setNavigationBarTitle({
title: this.data.navigateTitle,
success: function(res){
// success
}
})
}
})
var inTheatersUrl = app.globalData.doubanBase + "/v2/movie/in_theaters" + "?start=0&count=3";
var comingSoonUrl = app.globalData.doubanBase + "/v2/movie/coming_soon" + "?start=0&count=3";
var top = app.globalData.doubanBase + "/v2/movie/top" + "?start=0&count=3";
function http(url,callBack){
wx.request({
url: url,
method: 'GET',
header:{
"Content-Type": ""
},
success: function(res){
callBack(res.data);
},
fail: function(error){
console.log(error)
}
)}
}
module.exports = {
convertToStarsArray: converToStarsArray,
http:http
}
movie-grid template
<import src="../movie/movie-template.wxml" />
<template name="movieGridTemplate">
<view class="grid-container">
<block wx:for="{{movies}}" wx:for-item="movie">
<view class="single-view-container">
<template is="movieTemplate" data="{{...movie}}" />
</view>
</block>
</view>
</template>
实现上滑加载更多数据
<import src="../movie/movie-template.wxml"/>
<template name = "movieGridTemplate">
<scroll-view class="grid-container" scroll-y="true" scroll-x="false" bindscrolltolower = "onScrollLower">
<block wx:for="{{movies}}" wx:for-item="movie">
<view class="single-view-container">
<template is="movieTemplate" data="{{...movie}}"/>
</view>
</block>
</scroll-view>
</template>
小结
swiper
滑块视图属性
属性名 | 类型 | 默认值 | 说明 |
---|---|---|---|
indicator-dots |
Boolean |
false |
是否显示面板指示点 |
autoplay |
Boolean |
false |
是否自动切换 |
current |
Number |
0 |
当前所在页面的index
|
interval |
Number |
5000 |
自动切换时间间隔 |
<swiper>
只能放置<swiper-item/>
组件
image
图片属性
属性名 | 类型 | 默认值 | 说明 |
---|---|---|---|
src |
String |
无 | 图片资源地址 |
mode |
String |
scaleToFill |
图片缩放等 |
往后余生,唯独有你
简书作者:达叔小生
90后帅气小伙,良好的开发习惯;独立思考的能力;主动并且善于沟通
简书博客: https://www.jianshu.com/u/c785ece603d1
结语
- 下面我将继续对 其他知识 深入讲解 ,有兴趣可以继续关注
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