When do I use the initWithCoder: method?

Question

When am I supposed to use the initWithCoder: method?

Brandon Williams · Accepted Answer · 2010-11-17 20:54:35Z

12

Yes, if you are using a custom class in IB, then those objects are instantiated with the initWithCode: method. So, in your class you would override:

-(id) initWithCoder:(NSCoder*)aDecoder {
    if (! (self = [super initWithCoder:aDecoder]))
        return nil;

    // object has been created from IB... do initialization stuff here

    return self;
}

answered Nov 17, 2010 at 20:54

Brandon Williams

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Stefan Arentz · Accepted Answer · 2010-11-17 20:05:37Z

5

You are supposed to use the initWithCoder: method when you are working with objects that have been archived. For example when you specifically use NSKeyedUnarchiver to create these archived objects or when you need to add custom initialization code to objects that are coming from a xib file.

answered Nov 17, 2010 at 20:05

Stefan Arentz

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1 Comment

Christian Gossain Over a year ago

the reason I ask is because i've created a subclass of UIScrollView, i'd like to set it position in the xib and grab that info and use it to set up the subclass, would I use initWithCoder: for something like that?

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