Random number generating unique numbers in Objective-C?

objective-c random

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How do I generate random numbers on the iPhone?
```
int r = arc4random() % 100;
```

-(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

objective-c random

arc4random() %(100)-1 this is worked for me.

objective-c random

Use arc4random and store the results in an NSSet which will take care of the duplicates for you.

CodeHunter