[HungrySeacow]

I am guessing a few people have read his book and might be able to help me out with this challenge. For those who have not read the book, the challenge is to add a button to a preference panel to reset the values in the NSUserDefaults standardUserDefaults "BNREmptyDocKey" and "BNRTableBgColorKey" keys. One is a stores data for a collorWell, and the other for a checkbox. This is the code that I came up with, that just doesn't work . I get a warning, "Warning: passing argument 1 of 'registerDefaults:' from distinct Objective-C type". Anyone have an idea how this is supposed to work?

- (IBAction)resetDefaultsid)sender
{
NSUserDefaults *defaults;
defaults = [NSUserDefaults standardUserDefaults];
[defaults removeObjectForKey:@"BNREmptyDocKey"];
[defaults removeObjectForKey:@"BNRTableBgColorKey"];
[[NSUserDefaults standardUserDefaults] registerDefaults:defaults];
}

[ntt]

You are passing registerDefaults: an argument that is a NSUserDefaults object, but it expects an NSDictionary.

Look at the API here:
http://developer.apple.com/documenta...isterDefaults:

edit: i should also add that you can just edit the user defaults directly...
[[NSUserDefaults standardUserDefaults] removeObjectForKey:@"keyname"];

[Chuckit]

I don't think registerDefaults: is what you want at all. That sets default settings — what will be used if the user hasn't changed any settings. It won't override preferences. You want to edit the standardUserDefaults as ntt suggested.