tween中easing使用问题

Creator 版本:2.3.2
目标平台:iOS / 字节跳动调试工具

tween中使用bounceOut、backOut等动画,在上述平台报错:undefind;

查阅相关资料,官方没有给出具体哪些是否支持;

请问各位现版本支持哪些缓动动画

type Ease = "linear" | "fade" |
        "quadIn" | "quadOut" | "quadInOut" | "quadOutIn" |
        "cubicIn" | "cubicOut" | "cubicInOut" | "cubicOutIn" |
        "quartIn" | "quartOut" | "quartInOut" | "quartOutIn" |
        "quintIn" | "quintOut" | "quintInOut" | "quintOutIn" |
        "sineIn" | "sineOut" | "sineInOut" | "sineOutIn" |
        "expoIn" | "expoOut" | "expoInOut" | "expoOutIn" |
        "circIn" | "circOut" | "circInOut" | "circOutIn" |
        "elasticIn" | "elasticOut" | "elasticInOut" | "elasticOutIn" |
        "backIn" | "backOut" | "backInOut" | "backOutIn" |
        "bounceIn" | "bounceOut" | "bounceInOut" | "bounceOutIn";
cc.tween(node)
        .delay(5)
        .to(0.3, {scale:1}, {easing:'bounceOut'})
        .start();

ios平台:

可以参考这个 API :
https://docs.cocos.com/creator/api/zh/classes/Easing.html

这些缓动是否有打算转换成枚举的形式?