Swift-下标sort（）的歧义使用-Xcode 7.3

Question

I have updated my Xcode to version 7.3, which is compatible with iOS 9.3. My sort() method, which is let sortArr = saveDeals?.sort({ $1[2] as! String > $0[2] as! String}); , is giving me an "ambiguous use of subscript" error. Please let me know what I can do to fix this error. Thank you!

func sortSaveDealsArr(saveDeals: [AnyObject]?) -> [AnyObject]
{
    let sortArr = saveDeals?.sort({ $1[2] as! String > $0[2] as! String});
    return sortArr!;
}

Answer 1

The problem is that saveDeals is typed as a [AnyObject]? . Thus your $0 and $1 are each an AnyObject, and you can't subscript an AnyObject. You need to cast each of these things to something that is itself subscriptable. I don't know what's in your array so I can't say what that would be. Is saveDeals an array of arrays? If so, you need to cast saveDeals to that.