Random number generating unique numbers in Objective-C?

Question

I want to generate random numbers between 1-100 in Objective-C. Each random number should be unique and not the same as a previously generated random number.

Answer 1

Check this links

• Generating Random Numbers in Objective-C

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• How do I generate random numbers on the iPhone?

  int r = arc4random() % 100; 

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• Objective-C: Get random number

  -(int)getRandomNumberBetween:(int)from and:(int)to {      return (int)from + arc4random() % (to-from+1); } 

  How to use:

  1) Implement method above into your .m file

  2) Add the following line to your .h file:

  -(int)getRandomNumberBetween:(int)from and:(int)to; 

  3) Call the method like:

  int randomNumber = [self getRandomNumberBetween:9 and:99]; //this gets you a random number between 9 and 99 

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• Random Numbers in Objective-C