let dicFaceCount: UInt32 = 16 //定义随机数产生范围
let randomRoll = Int(arc4random_uniform(dicFaceCount)) + 1 //用arc4random方法生成随机数
print(randomRoll)

func randomInRange(range: Range<Int>) -> Int {
       let count = UInt32(range.endIndex - range.startIndex) //定义随机数产生范围，endIndex为upper bounds，startIndex为low bounds
       retrun Int(arc4random_uniform(count)) + range.startIndex //返回一个Int类型的随机数
}

for _ in 0...9 {
     print(randomInRange(1...6))  
}