cocos2d native版本中cc.TextFieldTTF没显示？

Question

我按照官方的test-js写了一个cc.TextFieldTTF但是为什么编译成apk在手机安装运行却没显示呢?

HTML5版本所有的东西是正常的，在手机的原生app中TextFieldTTF和位图字体都没显示

部分代码如下

// add CCTextFieldTTF
        var winSize = cc.director.getWinSize();

        this._textField = new cc.TextFieldTTF(" < click here for input > ",
            TEXT_INPUT_FONT_NAME,
            TEXT_INPUT_FONT_SIZE);
        this.addChild(this._textField);
        this._textField.setDelegate(this);

        this._textField.x = winSize.width / 2;
        this._textField.y = winSize.height / 2;
        this._trackNode = this._textField;

        //add play button
        var label = new cc.LabelBMFont("play", res.s_bitmapFontTest3_fnt);
        var item = new cc.MenuItemLabel(label, this.clickPlay, this);
        var menu = new cc.Menu(item);
        menu.x = 0;
        menu.y = 0;
        item.x = winSize.width/101*50;
        item.y = winSize.height/4;
        this.addChild(menu);