Picker not working well after upgrade to iOS4

I have been re working the iPhone 3 dev book to see if it all works in iOS4.

All went well until I hit the Data Picker

Is anything开发者_Go百科 changed there? I was able to get Date Picker to work but nothing after that.

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According to the docs, nothing changed in UIPickerView itself for ios4.0.

You're problem is most likely elsewhere.