Generate Array of Unique Random Numbers within Inclusive Range

Question

I am trying to write a function in Apple Swift (iOS) that will generate any given amount of unique random numbers that are within a given inclusive range, say between 0 and

Answer 1

// 1st version where I only blacklisted 8
var randomNumbers = [Int]()
for _ in 1...7 {
    var number = Int(arc4random_uniform(8))+1
    while  randomNumbers.contains(number) || number == 8{
        number = Int(arc4random_uniform(8))+1
    }
    randomNumbers.append(number)
}
print(randomNumbers)

// 2nd version where I created an array of blacklisted numbers
var randomNumbers = [Int]()
var blackList = [8, 5, 2, 7]
for _ in 1...3 {
    var number = Int(arc4random_uniform(10))+1
    while  randomNumbers.contains(number) || blackList.contains(number){
        number = Int(arc4random_uniform(10))+1
    }
    randomNumbers.append(number)
}
print(randomNumbers)

I created 2 empty arrays "randomNumbers" and "blackList" then set up a for loop statement. In the loop statement I initialize the variable "number." I assign "number" to a random number, then I use a while statement and .contians to check if "number" is already in the array "randomNumbers" or if the "number" is in the array "blackList" if either array contains "number," "number is reassigned until neither array contains "number". Then I randomNumbers.append(number) to append "number" into "randomNumbers" then the loop starts over again.