CODEWITHSUNDEEP
ioscocoa-touchinterface-builder
Tim S.
Tim S.

Reputation: 2257

Determining available runtime attributes for a UI element in Interface Builder

I've been playing around with a button in my storyboard, and had a hard time getting a border around it, until I found a page where it showed how to add a User Defined Runtime Attribute. I was able to make the button look as I wanted, but I wanted to know if there was a way for me to view the list of available attributes for a particular Object.

Clicking the "+" to add a new attribute doesn't provide any kind of auto-complete to show the available ones, and looking through my project code doesn't seem to reveal anything either, not surprisingly. Is there somewhere I can find all of the available attributes for all/any Objects in Xcode? Searches here on SO and in general have not shown any useful results so far.

Upvotes: 1

Views: 264

Answers (2)

David Pasztor
David Pasztor

Reputation: 54775

You can achieve the same thing from code, so just check the properties of UIButton (which is available in the documentation and with autocomplete) and you're good.

You also have to make sure you are checking the properties on an UIButton instance and not the class properties.

Upvotes: 1

antonsergeev88
antonsergeev88

Reputation: 171

User defined runtime attribute is a list of key paths that NIB loading subsystem uses through unarchived process. After initialisation message -setValue:forKeyPath: will be send to your unarchiving object for each key path from this list. So available attributes are not more than set union of all methods with selector sort of -setAttribute: and ivars with "_attribute" or "attribute" name. All that public attributes you may find at public headers or documentation. There's also possible to set private attributes, but it's not good practice. For instance, you may find all ivars by breakpoint execution inside any method and look inside "self".

Upvotes: 1

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