添加更多页面，实例化下面的bar
Revert "添加更多页面，实例化下面的bar"

This reverts commit 675c7d8c2d34365c051d698a6e17b022f3b4a695.
Revert "Revert "添加更多页面，实例化下面的bar""

This reverts commit 840254324a2b37761f4f51ab933b051b08ae6cae.