Say I have an NSSet with a string in it. If I send containsObject: with another string which is a different pointer but the exact same string value, will that return YES?
假设我有一个带有字符串的NSSet。如果我发送containsObject：与另一个字符串，它是一个不同的指针，但完全相同的字符串值，将返回YES？
Also, is it the same story when it comes to removeObject:? I.e., different objects with different pointers but the same string values will cause removal?
另外，当涉及到removeObject时，它是同一个故事吗？即，具有不同指针但具有相同字符串值的不同对象将导致删除？
1 个解决方案
#1
40
-containsObject: uses -isEqual: (and -hash) for equality testing. This applies to -removeObject: as well, and any other operations in NSSet that depend on some notion of equality.
-containsObject：使用-isEqual :(和-hash）进行相等性测试。这适用于-removeObject：以及NSSet中依赖于某些相等概念的任何其他操作。
#1
40
-containsObject: uses -isEqual: (and -hash) for equality testing. This applies to -removeObject: as well, and any other operations in NSSet that depend on some notion of equality.
-containsObject：使用-isEqual :(和-hash）进行相等性测试。这适用于-removeObject：以及NSSet中依赖于某些相等概念的任何其他操作。