"[AnyObject]" is not identical to "NSArray"

Question

Signature of a objective-c function i've used in the past is:

- (MMCall *)getLocalizedAppCategoriesWithOptions:(MMOptions *)options
                          success:(void (^)(NSArray *response))success
                          failure:(void (^)(NSError *error))failure;

I use to call it as -

[[whateverclassname new] getLocalizedAppCategoriesWithOptions:nil
                                                        success:^(NSArray *response) {
    }   failure:[^(NSError *error) {
}

It returns an NSArray of objects. These objects' parent class is NSObject and they have few properties. While experimenting with swift, i updated the bridging header file with the respective header file. Issues are -

If I call it following way, i get compile error as "'[AnyObject]' is not identical to 'NSArray'"

whateverclassname().getLocalizedAppCategoriesWithOptions(nil, success: {(response : NSArray!) in
    }, failure: {(error: NSError!)  in
})

If I call it following way, it compiles successfully but app crashes at runtime -

whateverclassname().getLocalizedAppCategoriesWithOptions(nil, success: {(response : [AnyObject]!) in
    }, failure: {(error: NSError!)  in
})

Please help me find out what's wrong with this?

There is no msg as such. But threads shows objc_exception_throw after [_NSArrayM insertObjectAtindex:] — Avi, Jul 19 '14 at 00:58
May be related: http://stackoverflow.com/questions/24113354/swift-array-element-cannot-be-bridged-to-objective-c/24113484#24113484 — BergQuester, Jul 19 '14 at 03:51

score 2 · Accepted Answer · edited Sep 22 '21 at 19:42

2

Found answer to both of my questions -

Since NSArray is immutable and [AnyObject] is Array type in Swift that's mutable, compiler complains they are not identical. I changed NSArray! to Array! in Swift code. Other option is was to change Objective-C code to success:(void (^)(NSMutableArray *response))success (not preferred as it kills the purpose of using the bridge).
Cast the Array to NSMuatableArray before calling the block in Objective-C

edited Sep 22 '21 at 19:42

pkamb

33,281
23
160
191

answered Jul 21 '14 at 23:48

Avi

2,196
18
18

You should also use generic array so that Swift can receive a concrete array type. – Sulthan Sep 22 '21 at 19:51

"[AnyObject]" is not identical to "NSArray"

1 Answers1