🔰extension

╱🚧 under construction

Swift ⟩ type ⟩ extension

⭐️ 重點

Extensions in Swift can:

• Add computed instance/type properties.

• Define instance/type methods.

• Provide new initializers.

• Define subscripts.

• Define and use new nested types.

• Make an existing type conform to a protocol.

• (Protocol Extensions) provide default implementations or add additional functionality.

🔴 主題

📘 手冊

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