fail to convert sortedArrayfromUsingSelector from 2.3 to 3.0

It was like this in swift2.3 in GitHub

" self.ListGroupname = tempList.sortedArrayUsingSelector(Selector("compare:")) "



and the system of swift 3.0 convert it to

" self.listGroupname = tempList.sortedArray(using: "compare:") "


while it gives a error message " sorted array produces [any] not the expected contextual result type "NSArray"




I have no idea what can I do. Can someone help?

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It’s hard to be 100% sure what’s going on here without knowing the type of 

tempList
and 
self.listGroupname
but, presuming they’re both NSArray, the issue is that 
NSArray.sortedArray(using:)
now returns 
[Any]
, which is not directly assignable to NSArray. A quick fix would be to add an 
as NSArray
. 
self.listGroupname = tempList.sortedArray(using: #selector(NSString.compare(_:))) as NSArray

However, you’d be better off looking at your use of NSArray to see if you can make the jump to Swift arrays. They have a bunch of advantages, not least of which is the thorough type checking.

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