How do I join an NSSet's elements to create an NSString?

Question

如果我有一个NSSet的NSString对象，我怎么能加入他们的行列，共同创建一个单一NSString ？

Answer 1

NSSet 's -allObjects method will return an NSArray of objects in the receiver.

So, knowing this, it's pretty simple:

[[set allObjects] componentsJoinedByString:@" "];