hashReturns an integer that can be used as a table address in a hash table structure.
- selfReturns the receiver.
レシーバを返します。
The object to be compared to the receiver. May be nil, in which case this method returns NO.
Instance Method
インスタンスメソッド
is
isEqual:
Returns a Boolean value that indicates whether the receiver and a given object are equal.
レシーバと与えられたオブジェクトが等しいかどうかを指し示すブール値を返します。
Availability
- iOS 2.0+
- iPadOS 2.0+
- macOS 10.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
Technology
- Objective-C Runtime Objective-Cランタイム
Declaration 宣言
- (BOOL)isEqual:(id)object;Parameters パラメータ
anObject
Return Value 戻り値
YES if the receiver and an are equal, otherwise NO.
Discussion 解説
This method defines what it means for instances to be equal. For example, a container object might define two containers as equal if their corresponding objects all respond YES to an is request. See the NSData, NSDictionary, NSArray, and NSString class specifications for examples of the use of this method.
If two objects are equal, they must have the same hash value. This last point is particularly important if you define is in a subclass and intend to put instances of that subclass into a collection. Make sure you also define hash in your subclass.