Random and non repeated text

is possible somehow make non repeated? im reading on internet fisher yates method , im wondering if easy way use in easy codes.

fisher-yates shuffle method

code:

- (void)shufflearray:(nsmutablearray *)array {      //fisher-yates shuffle      (int = [array count] - 1; > 0; i--) {          int j = arc4random() % [array count];          [array exchangeobjectatindex:i withobjectatindex:j];      }  }

for example exchange "% 6;" function?

code:

-(ibaction)randomwords:(id)sender {      int ran = arc4random() % 6;      switch (ran) {              case 0:                  textlabel.text = @"cat";                  break;              case 1:                  textlabel.text = @"dog";                  break;              case 2:                  textlabel.text = @"fish";                  break;              case 3:                  textlabel.text = @"horse";                  break;              case 4:                  textlabel.text = @"bird";                  break;              case 5:                  textlabel.text = @"f";               break;                  default:                  break;      }  }

 

i'm confused, looking do?

trying shuffle bunch of objects?

call rand() repeatedly , assign generated value each object. sort objects in ascending order random value. seed random when app launches current time, "random" values aren't same each time app closed , started again.

 

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