Swift - random number (min - max) avoiding repetition

I have a function that generate an integer random number between two given values. This function in my app will be called only two times however, I want to avoid that it generates two same numbers or two number next to each other. How could I fix the function below to achieve that?

Example Result:

1, 1 = wrong
1, 2 = wrong
8, 7 = wrong

8, 9 = correct
1, 3 = correct
3, 0 = correct

Function:

func randomNumber(minX:UInt32, maxX:UInt32) -> Int {
        let result = (arc4random() % (maxX - minX + 1)) + minX
        return Int(result)
    }