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Part VII: Completing Your Application > Creating Singletons by Overriding alloc...

Creating Singletons by Overriding allocWithZone:

You can override allocWithZone: to create singletons (classes that only have one instance). Singletons should be used with care as they bind tightly all their clients in the same way global variables do.

Singletons should never be released:


  

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