CODEWITHSUNDEEP
iosobjective-c
Joe Marion
Joe Marion

Reputation: 406

Randomize questions every time an app loads in Quiz

I am trying to randomize a set of questions I have in my app every time someone runs it. Right now I have

-(void)Category1{

    int QuestionSelected = rand() % 100;

    switch (QuestionSelected) {
        case 0:
            QuestionText.text = [NSString stringWithFormat:@"Here is where my first question is"];
            [Answer1 setTitle:@"First multiple choice" forState:UIControlStateNormal];
            [Answer2 setTitle:@"Second multiple choice" forState:UIControlStateNormal];
            [Answer3 setTitle:@"Third multiple choice" forState:UIControlStateNormal];
            [Answer4 setTitle:@"Fourth multiple choice" forState:UIControlStateNormal];
            Answer1Correct = YES;
            CorrectAnswerDisplay.text = [NSString stringWithFormat:@"Right Answer"];
            break;
        case 1:
            QuestionText.text = [NSString stringWithFormat:@"Here is where my second question is"];
            [Answer1 setTitle:@"First multiple choice" forState:UIControlStateNormal];
            [Answer2 setTitle:@"Second multiple choice" forState:UIControlStateNormal];
            [Answer3 setTitle:@"Third multiple choice" forState:UIControlStateNormal];
            [Answer4 setTitle:@"Fourth multiple choice" forState:UIControlStateNormal];
            Answer1Correct = YES;
            CorrectAnswerDisplay.text = [NSString stringWithFormat:@"Right Answer"];
            break;

This works all fine and dandy, but it only randomizes it once. So It randomizes all 100 questions I have in it, but if I close my app and run it again from the beginning, it randomizes the same way it did before so it runs exactly the same as it did before with the same questions. Is there something better than my rand() line?

Upvotes: 0

Views: 127

Answers (2)

Hussain Shabbir
Hussain Shabbir

Reputation: 15015

Replace this line:-

    int QuestionSelected = rand() % 100;

With modified below line:-

   int QuestionSelected=(int)
   arc4random_uniform(100)

Upvotes: 0

rmaddy
rmaddy

Reputation: 318824

rand needs to be seeded with a call to srand. Better yet, replace your use of rand with arc4random or arc4random_uniform. It doesn't need to be seeded and gives better results.

Upvotes: 1

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