dart - 在已发布的 Flutter/Dart 包中重构参数名称时如何保持向后兼容性？

Question

我正在为我的第一个开源 flutter 库做贡献，必须更改一些变量名称以使项目连贯。

库所有者指出重构的参数会破坏从以前版本更新的应用程序。他让我使用别名并将旧变量设置为弃用，以便开发人员可以将其更改为下一个主要版本。

我已经进行了一些谷歌搜索，但找不到有关如何以专业方式执行此类操作的教程。我实际上根本找不到有关别名的信息。

有人可以帮助我帮助社区吗？

编辑:构造函数前后

之前:

CarouselSlider({
  @required
  this.items,
  this.viewportFraction: 0.8,
  this.initialPage: 0,
  this.aspectRatio: 16/9,
  this.height,
  this.realPage: 10000,
  this.autoPlay: false,
  this.interval: const Duration(seconds: 4),
  this.reverse: false,
  this.autoPlayCurve: Curves.fastOutSlowIn,
  this.autoPlayDuration: const Duration(milliseconds: 800),
  this.updateCallback,
  this.distortion: true,
})

之后:

CarouselSlider({
  @required
  this.items,
  this.height,
  this.aspectRatio: 16/9,
  this.viewportFraction: 0.8,
  this.initialPage: 0,
  this.realPage: 10000,
  this.reverse: false,
  this.autoPlay: false,
  this.autoPlayInterval: const Duration(seconds: 4),
  this.autoPlayAnimationDuration: const Duration(milliseconds: 800),
  this.autoPlayCurve: Curves.fastOutSlowIn,
  this.enlargeCenterPage: false,
  this.pauseAutoPlayOnTouch,
  this.onPageChangedCallback,
})

重构名称:

interval         --> autoPlayInterval
distortion       --> enlargeCenterPage
autoPlayDuration --> autoPlayAnimationDuration
updateCallback   --> onPageChanged

Answer 1

interval 属性的示例

CarouselSlider({
  @required
  this.items,
  this.viewportFraction: 0.8,
  this.initialPage: 0,
  this.aspectRatio: 16/9,
  this.height,
  this.realPage: 10000,
  this.autoPlay: false,

  @Deprecated('use "autoplayInterval" instead') 
  Duration interval: const Duration(seconds: 4),
  Duration autoplayInterval,

  this.reverse: false,
  this.autoPlayCurve: Curves.fastOutSlowIn,
  this.autoPlayDuration: const Duration(milliseconds: 800),
  this.updateCallback,
  this.distortion: true,
}) : assert(interval == null || autoplayInterval == null, 'Use either "interval" or "autoPlayInterval", but not both.'), autoplayInterval = autoplayInterval ?? interval;