
how to convert [Any] Array to NSArray, because I want to use
Why are you converting [Any] to NSArray when you can use reversed() with your [Any]? In Swift it's better to use a native Array instead of NSArray.
for item in keysStoreBySize.reversed() {
}
If you still want to use NSArray then you can use the NSArray initializer init(array:).
let array = NSArray(array: keysStoreBySize) //Will convert [Any] to NSArray