向布局文件添加TabPageIndicator的时候出现问题
错误情况:
Rendering Problems Missing styles.
Is the correct theme chosen for this layout?
Use the Theme combo box above the layout to choose a different layout,
or fix the theme style references.
Failed to find style 'vpiTabPageIndicatorStyle' in current theme
解决方法:
在priview里把Theme调整为PageIndivatorDefault