Swift 3 - How to append NSMutableArray objects to another NSMutableArray

Question

I wan to append objects from a NSMutablArray to another NSMutableArray on Swift 3 but I can't achieve that.

This is what I tried to do first:

mutableArray.addObjects(from: anotherMutableArray)

And I got this error:

Cannot convert value of type 'NSMutableArray?' to expected argument type '[Any]'

Then I tried this:

mutableArray.addObjects(from: anotherMutableArray as [Any])

And I got this error:

Cannot convert value of type 'NSMutableArray?' to type '[Any]' in coercion

How can I append objects from a NSMutableArray to another NSMutableArray on Swift 3?

rmaddy · Accepted Answer · 2016-10-08 21:02:28Z

5

You need to cast the NSMutableArray to a Swift array of AnyObject, not Any.

mutableArray.addObjects(from: anotherMutableArray as [AnyObject])

answered Oct 8, 2016 at 21:02

rmaddy

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2 Comments

Now I get the error: Cannot convert value of type 'NSMutableArray?' to type '[AnyObject]' in coercion

Is your anotherMutableArray optional? Is so, you need to deal with it properly just like any optional.