Random number generator in Swift

RandomNumbers.swift

public struct RandomNumberGenerator: SequenceType {
    let range: Range<Int>
    let count: Int
    
    public init(range: Range<Int>, count: Int) {
        self.range = range
        self.count = count
    }
    
    public func generate() -> GeneratorOf<Int> {
        var i = 0
        return GeneratorOf<Int> {
            return (i++ == self.count) ? .None : randomNumberFrom(self.range)
        }
    }
}

public func randomNumberFrom(from: Range<Int>) -> Int {
    return from.startIndex + Int(arc4random_uniform(UInt32(from.endIndex - from.startIndex)))
}

public func randomNumbersFrom(from: Range<Int>, #count: Int) -> RandomNumberGenerator {
    return RandomNumberGenerator(range: from, count: count)
}

// MARK: Usage

// Generate multiple random numbers
for n in randomNumbersFrom(1...100, count: 10) {
    print(n)
}

// Generate a single random number
let n = randomNumberFrom(1...10)