Question

I want to allow the user to enter a valid date using the iPhone’s settings application.

I have experimented with many of the PreferenceSpecifiers data node types including date.

I have two issues:

When I specify date as the type, my app within the settings app crashes. Working examples would be greatly appreciated.
Since this approach hasn’t worked for me yet, will I programmatically be able to validate the date that the user enters?

Answer 1

The answer to number 2 is no. The only time you can validate the data entered is the next time your app is launched. None of your app s code is run via the Settings app.

You might consider pulling this setting into your app.

Answer 2

Have you read this guide and this section of the App guide? They describe in detail how the settings like this work.

You won t be able to validate anything a user sets through the Settings application. Also, I don t see Date as a valid setting type anywhere, so I don t even think this is possible through the Settings application.

I would simply create a settings view within the application. That way you can control your custom logic as you see fit.

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