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Editorial Team
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Asked: 2026-05-21T10:55:26+00:00

In Qt and in C# , I am able to easily define a input

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In Qt and in C#, I am able to easily define a input mask for things like phone numbers and serial numbers. Everything I have read so far leads me to believe that NSFormatter is the answer, but I am having trouble finding a complete example that does not suck. I really want to create a formatter for serial numbers that uses dashes between the segments and also limits the characters to a-z and 0-9. I want to be able to type over the dashes, copy and paste etc.

Example: ABC12-34DEF-GH567-890IJ-KL123

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1 Answer

  1. Editorial Team

    Although not complete, the best example I’ve found was on CocoaDev: MaskedTextField.

    If you feel like this should be a Cocoa feature, consider filing an enhancement request with Apple.

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