iOS 7 and using UIKit components in Juce

Apple won't let you submit an iOS app to their AppStore anymore unless its built with Xcode 5 against iOS 7.  

Since switching to building against iOS 7, a UIPickerView, i.e. that iOS spinning wheel control thingy, that I had embedded in a Juce component doesn't appear anymore.  I haven't had any luck so far figuring out what changed in iOS 7 that would cause problems when embedding a UIView in a Juce component.  Anyone else run into this problem?

Turns out that the UIPickerView is transparent by default on iOS 7 and you have to set the color to see it:  

[pickerView setBackgroundColor:[UIColor whiteColor]];