What kind of object does @[obj1, obj2] create?
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24-06-2021 - |
Question
I came across the following:
NSArray *array = @[object1, object2];
It seems to be creating an NSArray
, but is this array instance an autoreleased object, or must I release it?
Solution
This is a new collection literal available in the compiler that ship with xcode 4.4 and above
@[object1, object2];
is equivalent to
[NSArray arrayWithObjects:object1, object2, nil];
so yes, it is an autoreleased object, if you need this to be retained, you can do
myRetainedArray = [@[object1, object2] retain];
this question has a good description of all of the new literals
OTHER TIPS
It's the new llvm compiler's literal for creating an array. The compiler changes this to:
NSArray *array = [NSArray arrayWithObjects: object1,object2,nil];
So it is returning an autoreleased object.
A Google search brought up further info:
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