//title(标题)，
  //icon(图标),  success，loading，none
  //duration(延时) 0为不关闭, 毫秒数
  //options(其它参数),

  toast(title, icon = 'none', duration, options) {
    wx.showToast({
      title: title || '',
      icon: icon,
      image: (options && options.image) || '',
      duration: duration || 1500,
      mask: (options && options.mask) || true,
    });
  }