iOS How to randomize the random() function?

[midntdj]

I have a routine to randomly pick an item from a NSArray using

random() % 9

where 9 is the number of items in the NSArray. The problem I'm seeing is that every time I start my application, I'm getting the exact same random numbers being generated. This only happens when I exit the application and than restart it. I was expecting to see a different pattern each time I start the app. Is there a way to randomize the random function?

NSString strTemp = [[ NSArray arrayWithObjects: @"a.png", @"b.png", @"c.png", 
                           @"d.png",  @"e.png", @"f.png", @"h.png",@"i.png",
                           @"j.png",nil] objectAtIndex: (random() % 9)];

-- Thanks

 

[dejo]

You need to seed the random function.

 

[PhoneyDeveloper]

man random

srandom((unsigned)[NSDate timeIntervalSinceReferenceDate]);

https://forums.macrumors.com/threads/759736/

 

[midntdj]

Using srandom did the trick.

Thanks for posting the other related link.