Type Method 型メソッド

alloc

Returns a new instance of the receiving class. レシーバのクラスの新しいインスタンスを返します。

Declaration 宣言 

+ (instancetype)alloc;

Return Value 戻り値

A new instance of the receiver. レシーバ（受取り手）の新しいインスタンス。

Discussion 解説

This is an instance variable of the new instance that is initialized to a data structure describing the class; memory for all other instance variables is set to 0.

You must use an init... method to complete the initialization process. For example: 例えば： 


TheClass *newObject = [[TheClass alloc] init];

Do not override alloc to include initialization code. Instead, implement class-specific versions of init... methods.

For historical reasons, alloc invokes allocWithZone:.

See Also 参照

Creating, Copying, and Deallocating Objects オブジェクトの作成、複製、そして割り当て解除

+ allocWithZone:
Returns a new instance of the receiving class. レシーバのクラスの新しいインスタンスを返します。
- init
Implemented by subclasses to initialize a new object (the receiver) immediately after memory for it has been allocated. サブクラスによって実装されて、新しいオブジェクト（レシーバ）を、それのためのメモリが割り当てられた直後に初期化します。
- copy
Returns the object returned by copyWithZone:.
+ copyWithZone:
Returns the receiver. レシーバを返します。
- mutableCopy
Returns the object returned by mutableCopyWithZone: where the zone is nil.
+ mutableCopyWithZone:
Returns the receiver. レシーバを返します。
- dealloc
Deallocates the memory occupied by the receiver. レシーバによって占有されたメモリを割り当て解除します。
+ new
Allocates a new instance of the receiving class, sends it an init message, and returns the initialized object.