How to make a uni-app project? Process explanation
How to make a uni-app project? This article will give you a systematic explanation of the process of making a uni-app. I hope it will be helpful to you!
The process of making a uni-app:
Contains a large number of current front-end essential skills, such as vue, WeChat applet , component encapsulation, mobile gesture encapsulation, data paging, axios, moment, flex layout, sass, video playback, video download and other functions. [Related recommendations: "uniapp tutorial"]
1. Introduction to uni-app
1.1 What is uni- app
uni-app is a framework that uses vue.js syntax to develop all front-end applications
can develop various things
It is also called full-end Development framework
2. uni-app basics
2.1 Basic knowledge
- First experience of uni-app
- Project structure introduction
- Style and sass
- Basic syntax
- Events
- Components
- Lifecycle
3. Basics first, then projects
The required technology stack is
- html
- css
- JavaScript
- vue
- WeChat applet
- uni-app
- uni-ui
- uni-api
- moment.js
- gesture encapsulation
4. Use scaffolding to build the project
1. Global Install
npm install -g @vue/cli
2. Create project
vue create -p dcloudio/uni-preset-vue my-project
3. Start project (WeChat applet)
npm run dev:mp-weixin
4. WeChat applet developer tool import project
Remember to enter the root directory
4.1 Project directory
# #4.2 Style and sass
- supports rpx of mini programs and vw and vh of h5 has built-in sass configuration, you only need to install the corresponding dependencies Just "npm install sass-loader node-sass "In the vue component, add the attribute "
5. Basic syntax
Basic syntax of VueSuch as v-bind, v-if, v-show, v-for and so on6. Use of events
v-on7. Components
- Simple use of components
- Component passing parametersComponent slot
7.1 Simple use of components
- Definition of componentIntroduction of componentRegistration of componentUse of component
7.11 Definition of component
- Create a new folder components in the src directory to store componentsCreate a new component *.vue directly in the components directory
7.12 Component Introduction
- Introduce components into the page "import component name from'component path'"
7.13 Registration of components
- In the instance on the page, add the new attribute componentsThe attribute components is an object, put the component in and register it
7.14 Component Use
- In the tag of the page, directly use the introduced component "
7.2 Component passing parameters
- The parent passes parameters to the child through
- attributes The child passes parameters to the parent through
- How to trigger events Use global data to pass parameters
- By mounting the prototype of
- vue By
- globalData Way
7.21 Parent passes data to child
- Parent page to child component
- ul- com passed an array data through the attribute namelist The subcomponent received the data through
- props
<ul-com : list="[1,2,3,4]"> props: { list: Array },
7.22 The child passes data to the parent
- The child component passes data to the parent component by
- triggering the event The parent component listens through
- Event way to receive data
methods: { handleclick(){ this.$emit("textchange",'来自子组件的数据');} }
<ul-com :list="[1,2,3,4]" @textChange="handleTextchange">
- Set the click event on the child component
- Set the passed parameters in methods
- Set a listening event in the parent and son
- Accept a parameter in the parent's methods
7.3 Global shared data
- Share data through Vue’s prototype (obtained with this) Share data through globalData (definition Then use getapp to obtain)vuexLocal storage
- Tags are actually a type of data. If you want to dynamically transfer tags to sub-components, you can use slots
- to implement placeholders through slots
- The life cycle of the uni-app framework combines the life cycle of vue and WeChat applet
- Used in the global APPonLaunch means when the application starts
- is used in the page onLoad or onShow means when the page is loaded and when the page is displayed respectively
- is used in the component mountedWhen the component is mounted
Vue.prototype.baseURL="http: //www.baidu.com"
7.4 Component slot
To put it simply, throw the tag of the parent page to the child page
8. Life cycle
8.1 Introduction
This article is reproduced from: https://juejin.cn/post/6996561691639037983
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