输入框得到焦点后，输入的内容都是蓝色的字，失去焦点后变回设置的颜色，而整个流程中我并没有设置过蓝色字。
import { ui } from "../../ui/layaMaxUI";
import GameData from "../game/GameData";
import IHttpResponse from "../../network/interfaces/IHttpResponse";
import Notice from "../../utils/Notice";

export default class AuthReg extends ui.AuthRegUI {

    /** 密码临时存储 */
    private _tmp_pwd: string = "";
    /** 输入框数组 */
    private _arrInput: Laya.TextInput = [this.input_nickname, this.input_mobile, this.input_password, this.input_repassword];
    /** 标签数组 */
    private _arrLabel: Laya.Label = [this.lb_nickname, this.lb_mobile, this.lb_password, this.lb_repassword];
    /** 验证标记 */
    private _arrCheck: boolean = [false, false, false, false];

    private init() {
        // 设置背景色为场景高度
        this.box_color_bg.height = Laya.stage.height;
    }

    onEnable() {
        this.init();
        // 判定是注册还是忘记密码
        if (GameData.I.isReg) {
            this._regMode();
        }
        else {
            this._forgetMode();
        }

        // 添加取消事件
        this.lb_cancel.on(Laya.Event.CLICK, this, () => {
            // 返回登陆页
            Laya.Scene.open("Auth.scene");
        });

        // 遍历数组添加事件
        this._arrInput.forEach((element, index) => {
            element.on(Laya.Event.FOCUS, this, this._onInputEvent, [element, this._arrLabel[index], Laya.Event.FOCUS]);
            element.on(Laya.Event.BLUR, this, this._onInputEvent, [element, this._arrLabel[index], Laya.Event.BLUR]);
        });

        try {

            // 添加注册事件
            this.btn_register.on(Laya.Event.CLICK, this, this._onRegister);
        } catch(e) {
            console.log(e);
        }
    }

    /**
     * 点击注册
     */
    private async _onRegister() {
        // console.table(this._arrCheck);
    }

    /**
     * 检查注册自信是否正确
     */
    private _checkRegInfo(): boolean {
        // TODO 还没有写检查!!!!!
        if (!this._arrCheck[0]) {
            Notice.I.show("用户名不能为空!");
            return false;
        }
        else if (!this._arrCheck[1]) {
            Notice.I.show("手机号输入有误!");
            return false;
        }
        else if (!this._arrCheck[2]) {
            Notice.I.show("密码长度不够!");
            return false;
        }
        else if (!this._arrCheck[3]){
            Notice.I.show("确认密码输入有误!");
            return false;
        }
        return true;
    }

    /**
     * 输入框事件
     * @param input TextInput
     * @param lable Label
     * @param e Event
     */
    private _onInputEvent(input: Laya.TextInput, lable: Laya.Label, e: string) {
        switch (e) {
            case Laya.Event.FOCUS:
                // input.color = "#fff";
                // // 输入框内没有内容则清空placeholder
                // if (input.align == "right") {
                //     input.changeText("");
                //     input.align = "left";
                // }
                // input.align = "left";
                lable.color = "#fff";
                // 改为密码类型
                // if (input.name == "input_password" || input.name == "input_repassword") {
                //     input.type = "password";
                // }
                break;
            case Laya.Event.BLUR:
                this._checkInput(input);
                // input.color = "#888";
                // 用户什么也没输入则恢复默认状态
                if (input.text.length == 0) {
                    this._setPlaceHolder(input);
                    // input.align = "right";
                    // input.type = "text";
                }
                lable.color = "#888";
                break;
        }
    }

    private _checkInput(input: Laya.TextInput) {
        let sp_icon: Laya.Sprite = new Laya.Sprite();

        // 判定是否有两个子对象
        if (input.numChildren == 2) {
            input.removeChildAt(1);
        }

        // 输入框为空则插入错误图标
        if (input.text.trim().length == 0) {
            input.changeText("");
            sp_icon.texture = Laya.loader.getRes("auth/sp_wrong.png");

            switch (input.name) {
                case "input_nickname":
                    this._arrCheck[0] = false;
                    break;
                case "input_mobile":
                    this._arrCheck[1] = false;
                    break;
                case "input_password":
                    this._arrCheck[2] = false;
                    break;
                case "input_repassword":
                    this._arrCheck[3] = false;
                    break;
            }
        }

        switch (input.name) {
            case "input_nickname":
                // && input.numChildren == 1                
                if (input.text.trim().length > 0) {
                    sp_icon.texture = Laya.loader.getRes("auth/sp_right.png");
                    this._arrCheck[0] = true;
                }
                break;
            case "input_mobile":
                if (input.text.trim().length < 11) {
                    sp_icon.texture = Laya.loader.getRes("auth/sp_wrong.png");
                    this._arrCheck[1] = false;
                }
                else {
                    sp_icon.texture = Laya.loader.getRes("auth/sp_right.png");
                    this._arrCheck[1] = true;
                }
                break;
            case "input_password":
                // 临时存储密码
                this._tmp_pwd = input.text.trim();

                if (input.text.trim().length > 0 && input.text.trim().length < 6) {
                    sp_icon.texture = Laya.loader.getRes("auth/sp_wrong.png");
                    this._arrCheck[2] = false;
                }
                else if (input.text.trim().length >= 6) {
                    sp_icon.texture = Laya.loader.getRes("auth/sp_right.png");
                    this._arrCheck[2] = true;
                }
                break;
            case "input_repassword":
                console.log(input.text, this._tmp_pwd);
                if (input.text != this._tmp_pwd) {
                    sp_icon.texture = Laya.loader.getRes("auth/sp_wrong.png");
                    this._arrCheck[3] = false;
                }
                else if (input.text == this._tmp_pwd) {
                    sp_icon.texture = Laya.loader.getRes("auth/sp_right.png");
                    this._arrCheck[3] = true;
                }
                break;
        }

        sp_icon.pos(input.width + 10, -8);
        input.addChild(sp_icon);
    }



    /**
     * 占位符处理
     * @param input TextInput
     */
    private _setPlaceHolder(input: Laya.TextInput) {
        switch (input.name) {
            case "input_nickname":
                // input.changeText("限6个中文以内");
                input.prompt = "限6个中文以内";
                break;
            case "input_mobile":
                // input.changeText("11位数字");
                input.prompt = "11位数字";
                break;
            case "input_password":
                // input.changeText("6-12位字符");
                input.prompt = "6-12位字符"
                break;
            case "input_repassword":
                // input.changeText("请重复输入密码");
                input.prompt = "请重复输入密码";
                break;
        }
    }

    /**
     * 注册模式
     */
    private _regMode() {
        this.lb_head.changeText("注册");
        this.lb_head.pivotX = this.lb_head.width >> 1;
        this.box_register.x = Laya.stage.width >> 1;
        this.box_forget.x = -1000;
    }

    /**
     * 忘记模式
     */
    private _forgetMode() {
        this.lb_head.changeText("忘记密码");
        this.box_forget.x = Laya.stage.width >> 1;
        this.box_register.x = -1000;
    }
}
附件：
TS_2D_Demo_InputBug.zip
TS_2D_Demo_InputBug.zip