CODEWITHSUNDEEP
objective-c
Amer Hukic
Amer Hukic

Reputation: 1524

Objective C default init for NSObject subclass

I'm new to Objective C and I know this is a rather trivial question.
I made a subclass of NSObject, defined some new properties and didn't define an initializer in the subclass. What happens when I call this line of code: 

CustomClass *cl = [[CustomClass alloc] init];

In this line I call the superclass init method but how do the properties in my subclass get initialized?

Upvotes: 1

Views: 515

Answers (1)

rmaddy
rmaddy

Reputation: 318944

All instance variables (the ones backing your properties) are initialized to default values when you create a new object instance.

All object pointers get set to nil. All primitive types get a value of 0 (BOOL is set to NO).

In other words, all properties in your subclass with be set to an appropriate form of "zero".

Upvotes: 1

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