以随机顺序重新排列 NSArray/MSMutableArray [英] Re-arrange NSArray/MSMutableArray in random order

问题描述

我使用 NSArray/NSMutable 数组来存储不同的对象.添加所有对象后，我想以随机顺序重新排列它们.我该怎么做?

I'm using NSArray/NSMutable array to store different objects. Once all the objects are added, I want to re-arrange them in random order. How can I do it?

推荐答案

NSUInteger count = [yourMutableArray count];
for (NSUInteger i = 0; i < count; ++i) {
// Select a random element between i and end of array to swap with.
   int nElements = count - i;
   int n = (arc4random() % nElements) + i;
   [yourMutableArray exchangeObjectAtIndex:i withObjectAtIndex:n];
}

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