How can I have Exposed filter of Flag type in views? I want to add Exposed filters of flag types in Views. 

I have many flag types and I want users to be able to select their favorite Flag type to show result.
You can follow these steps:


You can create taxonomy terms for your flag types.
Add  term reference (taxonomy reference) field in your content type pointing to flag taxonomy.
In your view, add filter of taxonomy terms then and check exposed filter checkbox.


You can use Better Exposed Filters module for better UI.