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这个 PR 做了什么?
让页面组件能自定义navigationOptions,方便RN开发者修改页面导航信息
参考:https://reactnavigation.org/docs/en/header-buttons.html
这个 PR 是什么类型? (至少选择一个)
这个 PR 满足以下需求:
这个 PR 涉及以下平台:
其它需要 Reviewer 或社区知晓的内容: