How uniapp implements passing data between pages
Uniapp implements how to transfer data between pages, requiring specific code examples
In uniapp development, transferring data between pages is a very common requirement. Through reasonable data transfer, we can achieve data sharing and interaction when page jumps. This article will introduce how to implement data transfer between pages in uniapp and give specific code examples.
- Use URL parameters to pass data
Pending data through URL parameters is the most common and simplest way. By adding parameters in the URL of the jump link, data can be transferred between pages. The following is a sample code:
// Page A
<text>{{param}}</text>
<button @click="navigateToPageB">跳转至页面B</button><script><br>export default {<br> data() {</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>return { param: 'Hello Uniapp' }</pre><div class="contentsignin">Copy after login</div></div><p>},<br> methods: {</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>navigateToPageB() { uni.navigateTo({ url: '/pages/pageB?pageParam=' + this.param }) }</pre><div class="contentsignin">Copy after login</div></div><p>}<br>}<br></script>
// Page B
<text>{{pageParam}}</text>
<script><br>export default {<br> data() {</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>return { pageParam: '' }</pre><div class="contentsignin">Copy after login</div></div><p>},<br> onLoad(options) {</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>this.pageParam = options.pageParam</pre><div class="contentsignin">Copy after login</div></div><p>}<br>}<br></script>
In page A, we jump to page B through the button click event and carry the parameter pageParam. In page B, the passed parameters are obtained through the onLoad life cycle function and assigned to pageParam, and then displayed on the page.
- Use Vuex global state management
If you need to share data between multiple pages, using Vuex is a good choice. Vuex is a state management pattern developed specifically for Vue.js applications and can also be used in uniapp. Here is a sample code:
// store/index.js
import Vuex from 'vuex'
import Vue from 'vue'
Vue.use(Vuex)
export default new Vuex.Store({
state: {
data: 'Hello Uniapp'
},
mutations: {
updateData(state, payload) {
state.data = payload
}},
actions: {} ,
getters: {}
})
// Page A
<text>{{data}}</text>
<button @click="navigateToPageB">跳转至页面B</button><script><br>import { mapState } from 'vuex'</p><p>export default {<br> computed: {</p><div class="code" style="position:relative; padding:0px; margin:0px;"><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>...mapState(['data'])</pre><div class="contentsignin">Copy after login</div></div><div class="contentsignin">Copy after login</div></div><p>} ,<br> methods: {</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>navigateToPageB() { this.$store.commit('updateData', 'Hello Page B') uni.navigateTo({ url: '/pages/pageB' }) }</pre><div class="contentsignin">Copy after login</div></div><p>}<br>}<br></script>
// Page B
<text>{{data}}</text>
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Generally speaking, uni-app is better when complex native functions are needed; MUI is better when simple or highly customized interfaces are needed. In addition, uni-app has: 1. Vue.js/JavaScript support; 2. Rich native components/API; 3. Good ecosystem. The disadvantages are: 1. Performance issues; 2. Difficulty in customizing the interface. MUI has: 1. Material Design support; 2. High flexibility; 3. Extensive component/theme library. The disadvantages are: 1. CSS dependency; 2. Does not provide native components; 3. Small ecosystem.
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UniApp has many conveniences as a cross-platform development framework, but its shortcomings are also obvious: performance is limited by the hybrid development mode, resulting in poor opening speed, page rendering, and interactive response. The ecosystem is imperfect and there are few components and libraries in specific fields, which limits creativity and the realization of complex functions. Compatibility issues on different platforms are prone to style differences and inconsistent API support. The security mechanism of WebView is different from native applications, which may reduce application security. Application releases and updates that support multiple platforms at the same time require multiple compilations and packages, increasing development and maintenance costs.
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Which is better, uniapp or native development?
Apr 06, 2024 am 05:06 AM
When choosing between UniApp and native development, you should consider development cost, performance, user experience, and flexibility. The advantages of UniApp are cross-platform development, rapid iteration, easy learning and built-in plug-ins, while native development is superior in performance, stability, native experience and scalability. Weigh the pros and cons based on specific project needs. UniApp is suitable for beginners, and native development is suitable for complex applications that pursue high performance and seamless experience.
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What component library does uniapp use to develop small programs?
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Recommended component library for uniapp to develop small programs: uni-ui: Officially produced by uni, it provides basic and business components. vant-weapp: Produced by Bytedance, with a simple and beautiful UI design. taro-ui: produced by JD.com and developed based on the Taro framework. fish-design: Produced by Baidu, using Material Design design style. naive-ui: Produced by Youzan, modern UI design, lightweight and easy to customize.
