let richText = this.viewNode.getChildByName('richText').getComponent(cc.RichText);

        const str = "<u>hello</u><color=#ff0000>Red Text,</color><br/>"+

            "<size=60>enlarge me,</size>"+

            "<br/><outline color=red width=4>A label with <i>outline,</i></outline>"+

            "<br/><b>This text will be rendered as bold,</b>"+

            "<br/><i>This text will be rendered as italic。</i>";

        this.richText(richText,str);

private richText(richTextNode,str: string = "") {

        const regex = /<.+?\/?>/g; // 匹配尖括号标签

        const matchArr = str.match(regex);

        const specialChar = "│";

        const replaceStr = str.replace(regex, specialChar); // 标签数组

        const textArr: string[] = replaceStr.split(specialChar); // 文字数组

        const strArr: string[] = []; // 存放处理过的文字数组

        let paraNum = 0; // 待替换参数个数

        for (let text of textArr) {

            // 非空字符替换成类似 $[0-n] 参数

            if (text !== "") {

                text = `$[${paraNum}]`;

                paraNum += 1;

            }

            strArr.push(text);

        }

        let templetStr: string = strArr.join(specialChar); // 数组转成待替换字符串

        for (let index = 0; index < textArr.length; index++) {

            // 转换代替换字符串之后, 删除文字数组多余空字符

            if (textArr[index] === "") {

                textArr.splice(index, 1);

                index = index - 1;

            }

        }

        while (templetStr.search(specialChar) !== -1) {

            // 数组转成的字符串原本 '特殊字符' 位置都是富文本标签的位置, 替换回标签

            if (matchArr[0]) {

                templetStr = templetStr.replace(specialChar, matchArr[0].toString());

                matchArr.splice(0, 1);

            } else {

                templetStr = templetStr.replace(specialChar,             "");// 空字符串替换,防止死循环

                console.warn("matchArr not enough");

            }

        }

        const lastStrArr: string[] = []; // 转换后富文本数组

        const arrayParm: string[] = new Array(paraNum).fill(""); // 替换参数数组

        for (let i = 0; i < textArr.length; i++) {

            for (const text of textArr[i]) {

                arrayParm[i] = arrayParm[i] + text;

                let replaceStr1 = templetStr;

                for (let index = 0; index < paraNum; index++) {

                    replaceStr1 = replaceStr1.replace(`$[${index}]`, arrayParm[index]);

                }

                lastStrArr.push(replaceStr1);

            }

        }

        let lastStrIndex = 0;

        const func = () => {

            if (lastStrIndex >= lastStrArr.length) {

                return;

            }

            richTextNode.string = lastStrArr[lastStrIndex];

            lastStrIndex += 1;

            setTimeout(() => {

                func();

            }, 100);

        };

        setTimeout(() => {

            func();

        }, 1000);

    }