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页面上有个小喇叭#xff0c;循环展示消息内容
逻辑思路
设置定时器#xff0c;修改translateX属性来实现滚动#xff0c;判断滚动位置#xff0c;修改list位置来实现无限滚动
实现效果 代码
/** Author: Do not edit* Date: 2023-09-07 11:11:45* LastEditors: …需求
页面上有个小喇叭循环展示消息内容
逻辑思路
设置定时器修改translateX属性来实现滚动判断滚动位置修改list位置来实现无限滚动
实现效果 代码
/** Author: Do not edit* Date: 2023-09-07 11:11:45* LastEditors: atwlee* LastEditTime: 2023-09-07 15:23:21* Description:* FilePath: /pan-ui/packages/Base/src/MessageScroll/index.tsx*/import { ReactNode, forwardRef, useEffect, useImperativeHandle, useRef, useState } from react;
import ./index.css;export interface MessageScrollProps {messages: ReactNode[];speed?: number;gap?: number;
}export interface MessageScrollRef {start: () void;pause: () void;restart: (sleep?: number) void;
}const Index forwardRefMessageScrollRef, MessageScrollProps((props, ref) {const { messages, speed 20, gap 20 } props;const [messageList, setMessageList] useStateReactNode[]([]);const messageListRef useRefReactNode[]([]);const [translateX, setTranslateX] useState(0);const container useRefHTMLDivElement(null);const exceed useRef(false);const scrollX useRef(0);const run useRef(true);useEffect(() {setMessageList(messages);}, [messages]);useEffect(() {restart(0);if (container.current) {exceed.current container.current.clientWidth container.current.scrollWidth - gap;}messageListRef.current messageList;}, [messageList]);const handleMessage () {const firstChildWidth container.current?.firstElementChild?.clientWidth;if (firstChildWidth scrollX.current firstChildWidth gap) {const [first, ...rest] messageListRef.current;setMessageList([...rest, first]);}};useEffect(() {const timer setInterval(() {if (run.current exceed.current) {scrollX.current 0.5;handleMessage();setTranslateX(translateX - scrollX.current);}}, speed);return () clearInterval(timer);}, []);const restart (sleep 200, reset false) {setTranslateX(0);reset setMessageList(messages);scrollX.current 0;run.current false;const timer setTimeout(() {run.current true;clearTimeout(timer);}, sleep);};useImperativeHandle(ref, () ({start: () {run.current true;},pause: () {run.current false;},restart: (sleep) {restart(sleep, true);},}));return (div classNamerc-message-scroll-container ref{container}{messageList.map((message, index) (divkey{index}classNamerc-message-scroll-itemstyle{{ transform: translate(${translateX}px), marginRight: ${gap}px }}{message}/div))}/div);
});export default Index;
.rc-message-scroll-container {position: relative;display: flex;flex-wrap: nowrap;overflow: hidden;
}
.rc-message-scroll-container .rc-message-scroll-item{flex-shrink: 0;
}FAQ
判断了内容不超出就不滚动如果内容超出了但是内容太少导致没有及时的handleMessage 没有处理这一块的逻辑。解决办法就是double一下数据
