Question

I have general question about designated initializer. I have a some class and from there i want to call a initializer, but before i started to fill my @properties with passing data i want to make data default. For example:

-(id)initWithDefault:(NSDictionary*)defaultTemplate
{
    self = [super init];

    _fontColor = [defaultTemplate objectForKey:@"color"];
    _fontSize = [[defaultTemplate objectForKey:@"size"] intValue];

    return self;
}

-(id)initWithTemplate:(NSDictionary*)template
{
    self = [self initWithDefault:myDefaultTemplate];

    //now i doing something with my template

    return self;

}

Is this is a way to prevent null @properties? It this a correct use of designated initializer? Of course you can assume that myDefaultTemplates is not null, and has not null object in keys.

Answer 1

This seems fine with me. I would use the safe way (presented below), but otherwise your code is fine.

-(id)initWithTemplate:(NSDictionary*)template 
{
    if(self = [self initWithDefault:myDefaultTemplate]) {

        //now i doing something with my template

    }

    return self;

}