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iphoneuitextfieldrestrict

Restrict Entries in UITextField

Is there a way to restrict a user to enter only certain information inside a UITextField? For example, I want to restrict a user to enter only U.S. states. I know I can use other controls, such as UIPickerView, but I want them to type this, if possible. Thanks.

Solution

  • check out:

    - ( BOOL )textField:( UITextField * )textField
    shouldChangeCharactersInRange:( NSRange )range
    replacementString:( NSString * )string

    Here's an article on autocomplete given an array of possible values (an NSMutableArray). You could probably change it slightly to limit the entries instead of suggestions for autocomplete.

    http://www.raywenderlich.com/336/how-to-auto-complete-with-custom-values

    Hope that helps.