Thanks for your samples. Wish my feedback can be a little helpful to this project.

Fix these issues:
1. Active status in nav bar does not show.
2. Active status in sample tab bar does not show correctly.
The tab label shows active, but the content does not show.
3. Page width is greater than current screen. A X-scroll always shows there.

Signed-off-by: chinafzy <chinafzy1978@gmail.com>