How do approaches to memory management differ in Objective-C and Swift?

In Objective-C and Swift, different approaches to memory management are used, although both languages support automatic memory management.

Objective-C:

• Uses the ARC (Automatic Reference Counting) mechanism, which is integrated into the compiler and automatically inserts calls to retain, release, and autorelease.
• Programmers must monitor strong and weak references to avoid cyclic dependencies and memory leaks.
• ARC in Objective-C operates at the compile level but requires understanding of object ownership rules.

Swift:

• Also uses ARC, but with a more strict type system and safety.
• Swift has built-in support for weak (weak) and unowned (unowned) references to prevent cycles.
• Thanks to modern syntax and type system, memory management becomes more transparent and safe.

Thus, both languages use ARC, but Swift offers a more modern, safe, and developer-friendly approach to memory management, minimizing errors related to cyclic references.