First, briefThe parent component nests a child component, and the parent component's handler function assigns a value to the group sub-component by way of the property (), the child component invokes the parent component's handler function by triggering the event, thereby passing the value to the parent
Component name: Alert, Alertios Specific code is as follows/* pop-up layer test */importreact,{component}from ' React ';import{stylesheet, view,image,text,touchableopacity,scrollview, navigator,alert,//introducing the Alert component touchablehighlight,alertios// Introduce the Alertios
React learning component 2,
One of the biggest features of React is its componentized development model. Let's give it a try today:Create two component headers and Footer. Common website headers and bottoms (where I copied my blog directly) to see the results:
There are several issues with the JSX Syntax:
1. Add a css
Mobile apps are often limited by the size of the screen, and the uncertainty of the length of data content requires a list component as a container for data presentation in many places.
Corresponds to the native application component, which may be iOS TableView or Android Listview,recycleview.
These components have some common features:
1. The view can be scrolled.
2. Reusable view template.
3. The view hei
' Use strict '; React.createclass ({//1. Creation PhaseGetdefaultprops:function(){ //called when a class is createdConsole.log (' Getdefaultprops '); return {}; }, //2. Instantiation PhaseGetinitailstate:function(){ //get the default value for This.stateConsole.log (' Getinitailstate '); return {}; }, Componentwillmount:function(){ //called prior to render //The processing of business logic puts this, as with the operation of stateConsole.log (' Componentwillmount
Material Design-style component library based on the react native. (For the Platform unified experience, currently only to support Android)
Official website http://mrn.js.org/
Github HTTPS://GITHUB.COM/BINGGG/MRN
Sample Application Online Demo https://appetize.io/app/j48zj9r83cetpd1mhg4g8buc4w
Sample app Download https://github.com/binggg/MaterialReactNative/blob/master/android/app/build/outp
Component is one of the greatest advantages of react-native, because we can do partial refreshes to improve performance.
The parent component, as shown in the figure, contains a child component addition that can dynamically add subcomponents
Log output:
Add key code:
_onpress () {
if (show) {/* Display cann
1. Creation PhaseGetdefaultprops: The default value for handling props is called in React.createclass2. Instantiation PhaseReact.render (after Getinitialstate, Componentwillmount, Render, ComponentdidmountState : The properties of the component are primarily used to store the data required by the component itself, and each time the data is updated by modifying the value of the State property, the Reactjs in
() {return( This.clickcb}> 1ref="Li2">23) } }); vardiv = document.getElementById ('a'); Reactdom.render (, div);The second Li in the component is bound to a ref attribute with a value of li2, which means that the change reactelement can be obtained in this.refs.li2 form in the component. Then bind the point-click event to determine whether the clicked Li Element equals This.refs.lis.getDOMNode9 (
1.antd-mobile is an open source React component library by Ant Finance Team, which has a lot of components to use, let me introduce his usage:
2. According to the official website HTTP://BETA.MOBILE.ANT.DESIGN/DOCS/REACT/INTRODUCE-CN on the operation steps:
NPM Install Antd-mobile@next--save3. The Package.json file in your project will have a antd-mobile refe
Reactnative provides a Refreshcontrol drop-down refresh component, but does not provide a pull-up refresh component, and pull-up refreshes are very common in the app.Today we are going to implement an iOS and Android Universal pull-up refresh feature.The following is a brief introduction of my idea of implementation.If your basic knowledge of the ListView is not very clear, it is recommended to move first:
The component is loaded the first time it is initialized.ImportReact, {proptypes} from ' React ';//import Appcomposer from './views/app/appcomposer ';//import Logincomposer from './views/login/logincomposer ';//import Homecomposer from './views/home/homecomposer ';//import Watchlistcomposer from './views/watchlist/watchlistcomposer ';//import Systemlogcomposer from './views/systemlog/systemlogcomposer ';//i
First, the demandWhen there is a value for the Pass property name, the hello "name" is displayed, otherwise the Hello WorldTwo, 4 ways of code implementation1. Through ternary operators 2. Pass the variable 3. Calling functions directly in the property 4. Use and operation Iii. Results of operationAssigning values to react component properties through expressions and functions
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