通过base64转化为图片

//传入base64和要设置的sprite
createImgByBase64(base64Info, sprite) {

    if (!sprite) {
        return;
    }

    //默认数据
    if (!base64Info || base64Info.length <= 0) {

     base64Info = "默认的的base64'

    }

    let img = new Image();

    img.src = base64Info

    let texture = new cc.Texture2D();

    texture.initWithElement(img);

    texture.handleLoadedTexture();

    sprite.spriteFrame = null;

    sprite.spriteFrame = new cc.SpriteFrame(texture);

}