问题
why my Braintree Drop-In controller doesn't have label for Credit Card, Expire date, and CVV on their respective TextField?
It only show blank textfield without label.

回答1:
I haven't found the solution for manual installation. But new BrainTree Pod install (3.6.1) fix the problem (missing label) without showing another problem (GCC_TREAT_WARNINGS_AS_ERRORS
& GCC_WARN_ABOUT_MISSING_NEWLINE
)
来源:https://stackoverflow.com/questions/28669385/braintree-drop-in-controller-not-show-correctly