Warning: No 'initWithPrimaryKey". method found [closed]

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I'm getting the following warning in this statement:

Warning: No 'initWithPrimaryKey". method found

HoldingArray *holdObj=[[HoldingArray alloc] initWithPrimaryKey:n];

Any suggestions are welcome.

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The error should be clear: The class HoldingArray doesn't expose a method initWithPrimaryKey.

Refer to the source code of the class HoldingArray or the documentation which methods are available.