arc4random_uniform infinite loop

I am trying to create random questions in my app that show users different question each time. I am trying to be sure about all answer is uniqe and different. The code that is below create question and check the answers is different from each other. But when instance of question is lower it create infinite loop. For example if I have 4 question instance it goes infinite. I have fixed that by increasing minimum number of question. Now I have at least 8 differen question at start and there is no problem.

var i = 0

while i < 4 {

var isInAnswers = false

let number = questions.count.random()

if i == idOfCorrectAnswer {

i += 1

} else {

let word = questions[number]

Answers.forEach{ if $0.currentTitle == word.name { isInAnswers = true}}

if !isInAnswers {

Answers[i].setTitle(word.name , for:.normal)

i += 1

}

}

}