Differentiate between ‘assign’ and ‘retain’ keyword.
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Answer / Prem Singh Jat
In Objective-C, both 'assign' and 'retain' are memory management keywords used with properties. However, they have different usage:
1. 'assign': It implies that the property should manage its own memory by using copy semantics for any setter method implementation.n - Default behavior: If not specified, 'assign' is assumed.n - When to use: Use 'assign' when setting simple types like NSNumber, NSString, or BOOL, which are immutable and do not require retaining.
2. 'retain': It implies that the property should retain its value during its lifetime.n - When to use: Use 'retain' when setting objects that can be mutated, like custom classes or collections.
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