Access random items from an array in the iPhone SDK

问题

I want to know how to access random items from array in the iPhone SDK?

I have made a music player in which the next song comes from array on button-click, but I want to get the songs randomly.

回答1:

You can use the rand() function:

NSInteger randomIndex = rand () % [list count];
Thing * randomThing = [list objectAtIndex:randomIndex];

Don't forget to call srand(unsigned int seed) on startup:

srand(time(0)); 

来源：https://stackoverflow.com/questions/3509411/access-random-items-from-an-array-in-the-iphone-sdk