swift 3.0 協議筆記

來源:互聯網
上載者:User

標籤:執行個體   swift   計算   code   讀寫   tor   instance   變數   關鍵字   

  協議能夠要求遵循者必須含有一些特定名稱和類型的執行個體屬性(instance property)或類屬性(type property),也能夠要求屬性的(設定許可權)settable 和(存取權限)gettable,但它不要求屬性儲存型屬性(stored property)還是計算型屬性(calculate property)。通常前置var關鍵字將屬性聲明為變數。在屬性聲明後寫上{ get set }表示屬性為可讀寫的。{ get }用來表示屬性為可讀的。即使你為可讀的屬性實現了setter方法,它也不會出錯。

swift 3.0 協議筆記

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