在Swift 2.0中，GameplayKit可能会来拯救你!(iOS9或更高版本支持)

import GameplayKit

func shuffle() {
    array = GKRandomSource.sharedRandom().arrayByShufflingObjectsInArray(array)
}

工作! !生物体是要洗牌的数组。

extension Array
{
    /** Randomizes the order of an array's elements. */
    mutating func shuffle()
    {
        for _ in 0..<10
        {
            sort { (_,_) in arc4random() < arc4random() }
        }
    }
}

var organisms = [
    "ant",  "bacteria", "cougar",
    "dog",  "elephant", "firefly",
    "goat", "hedgehog", "iguana"]

print("Original: \(organisms)")

organisms.shuffle()

print("Shuffled: \(organisms)")

以Nate的算法为例，我想看看Swift 2和协议扩展会是什么样子。

这是我想到的。

extension MutableCollectionType where Self.Index == Int {
    mutating func shuffleInPlace() {
        let c = self.count
        for i in 0..<(c - 1) {
            let j = Int(arc4random_uniform(UInt32(c - i))) + i
            swap(&self[i], &self[j])
        }
    }
}

extension MutableCollectionType where Self.Index == Int {
    func shuffle() -> Self {
        var r = self
        let c = self.count
        for i in 0..<(c - 1) {
            let j = Int(arc4random_uniform(UInt32(c - i))) + i
            swap(&r[i], &r[j])
        }
        return r
    }
}

现在，任何MutableCollectionType都可以使用这些方法，因为它使用Int作为索引

如果你想使用简单的Swift For循环函数，使用这个->

var arrayItems = ["A1", "B2", "C3", "D4", "E5", "F6", "G7", "H8", "X9", "Y10", "Z11"]
var shuffledArray = [String]()

for i in 0..<arrayItems.count
{
    let randomObject = Int(arc4random_uniform(UInt32(items.count)))

    shuffledArray.append(items[randomObject])

    items.remove(at: randomObject)
}

print(shuffledArray)

Swift Array使用扩展名->

extension Array {
    // Order Randomize
    mutating func shuffle() {
        for _ in 0..<count {
            sort { (_,_) in arc4random() < arc4random() }
        }
    }
}

let shuffl = GKRandomSource.sharedRandom().arrayByShufflingObjects(in: arrayObject)

这是我所使用的:

func newShuffledArray(array:NSArray) -> NSArray {
    var mutableArray = array.mutableCopy() as! NSMutableArray
    var count = mutableArray.count
    if count>1 {
        for var i=count-1;i>0;--i{
            mutableArray.exchangeObjectAtIndex(i, withObjectAtIndex: Int(arc4random_uniform(UInt32(i+1))))
        }
    }
    return mutableArray as NSArray
}