With the rapid development of front-end technology, more and more applications require cross-platform development to improve development efficiency and reduce development costs. In this regard, uniapp has become a popular framework. Due to its cross-platform features and convenient development model, many developers choose to use uniapp for development. However, in the process of developing using uniapp, you will encounter many problems, such as how to call the parent component's method through props.
In the vue component, we can transfer data and call methods through parent-child components. uniapp is also based on vue, so we can use the same principle to implement the method of calling the parent component using props in uniapp.
First, we need to define a method in the parent component and handle the logic we need in the method. For example:
<template> <div> <child></child> </div> <template> <script> import Child from './Child.vue' export default { components:{ Child }, methods:{ updateData(data){ console.log(data) } } } </script></template></template>
We define a method named updateData in the parent component, its function is to process the passed data.
Next, we need to use props in the child component to receive this method so that it can be called when needed.
<template> <div> <button>调用父组件方法</button> </div> </template> <script> export default { props: { updateData: { type: Function, required: true } }, methods:{ onClick(){ // 调用父组件的updateData方法 this.updateData('Hello World') } } } </script>
In the child component, we use props to receive the updateData method passed by the parent component, and call the onClick method through the @click event. At the same time, we use this.updateData('Hello World') in the onClick method to call The updateData method of the parent component.
Finally, we need to pass data from the parent component to the child component so that the parent component's methods can be called in the child component.
<template> <div> <child></child> </div> <template> <script> import Child from './Child.vue' export default { components:{ Child }, methods:{ updateData(data){ console.log(data) }, sendDataToChild(){ this.$refs.child.onClick() } }, mounted(){ this.sendDataToChild() } } </script></template></template>
In the parent component, we define a sendDataToChild method, whose function is to call the onClick method of the child component through this.$refs.child.onClick(). At the same time, execute the sendDataToChild method in the mounted life cycle hook so that it can be executed automatically after the subcomponent is rendered.
Through the above process, we can use props to call the parent component's method in uniapp. It should be noted that when using props to communicate between parent and child components, we must ensure that the types and values of props are correct, otherwise unexpected errors may occur.
The above is the detailed content of How do uniapp props call the method of the parent component?. For more information, please follow other related articles on the PHP Chinese website!

This article details uni-app's local storage APIs (uni.setStorageSync(), uni.getStorageSync(), and their async counterparts), emphasizing best practices like using descriptive keys, limiting data size, and handling JSON parsing. It stresses that lo

This article details workarounds for renaming downloaded files in UniApp, lacking direct API support. Android/iOS require native plugins for post-download renaming, while H5 solutions are limited to suggesting filenames. The process involves tempor

This article addresses file encoding issues in UniApp downloads. It emphasizes the importance of server-side Content-Type headers and using JavaScript's TextDecoder for client-side decoding based on these headers. Solutions for common encoding prob

This article details making and securing API requests within uni-app using uni.request or Axios. It covers handling JSON responses, best security practices (HTTPS, authentication, input validation), troubleshooting failures (network issues, CORS, s

This article details uni-app's geolocation APIs, focusing on uni.getLocation(). It addresses common pitfalls like incorrect coordinate systems (gcj02 vs. wgs84) and permission issues. Improving location accuracy via averaging readings and handling

This article compares Vuex and Pinia for state management in uni-app. It details their features, implementation, and best practices, highlighting Pinia's simplicity versus Vuex's structure. The choice depends on project complexity, with Pinia suita

The article details how to integrate social sharing into uni-app projects using uni.share API, covering setup, configuration, and testing across platforms like WeChat and Weibo.

This article explains uni-app's easycom feature, automating component registration. It details configuration, including autoscan and custom component mapping, highlighting benefits like reduced boilerplate, improved speed, and enhanced readability.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

Atom editor mac version download
The most popular open source editor

Dreamweaver Mac version
Visual web development tools

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
