鸿蒙Text部分文字变色

工具类：

export class TextUtil {public static readonly REGEX_B_S = "<B>"public static readonly REGEX_B_E = "</B>"/*** 获取高亮字符串列表* @param str 原始字符串*/public static getHlList(str ?: string, regex ?: string): HlContent[] {if (str == undefined) {return []}let list: HlContent[] = []if (regex == undefined || !str.includes(regex)) {let content = new HlContent()content.content = strlist.push(content)return list}if (TextUtil.REGEX_B_S == regex) {let splitStr: string[] = str.split(regex)for (let i = 0; i < splitStr.length; i++) {let temp = TextUtil.getHlList(splitStr[i], TextUtil.REGEX_B_E)if (temp != null && temp.length > 0) {list = list.concat(temp)}}}if (TextUtil.REGEX_B_E == regex) {let content1 = new HlContent()content1.isHl = truecontent1.content = str.substring(0, str.indexOf(regex))list.push(content1);let startIndex = str.indexOf(regex) + TextUtil.REGEX_B_E.lengthlet endIndex = str.lengthif (startIndex < endIndex) {let content2 = new HlContent()content2.content = str.substring(startIndex, endIndex)list.push(content2);}}return list}
}

实体类：

export class HlContent {content: string = ""isHl: boolean = false
}

实际使用中：

let contentStr = '北京大学'
let keyword = '大学'
Text() {//因为工具类只是识别b标签，这里先将'北京大学'替换成了'北京<b>大学</b>'ForEach(TextUtil.getHlList(contentStr.replace(keyword,`${TextUtil.REGEX_B_S}${keyword}${TextUtil.REGEX_B_E}`), TextUtil.REGEX_B_S), (item: HlContent) => {if (item != null && item.content != null && item.content.length > 0) {//设置“大学”为红色，其他字体为黑色if (item.isHl) {Span(item.content).fontColor(Color.Red)} else {Span(item.content).fontColor(Color.Black)}}})}.fontSize(14)

原文:https://www.jianshu.com/p/a33f445d1c75 略作改动