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在使用react Navigator做为导航器的时候,有时候需要知道知道 当前是哪个scene,方便问题追踪,哪位神人知道 ,不吝赐教 备注:相当 于用原生android开发时,控制台会打印当前是跳转到了哪个Activity,会在控制台输出 xxxActivity. 类似于这种效果