iOS Swift String Random 字串 亂數 亂碼

swift的隨機亂碼

1.FunctionHelper.swift

class FunctionHelper {

    // 產生亂碼 len-需要亂碼長度
    func randomString(len:Int) -> String {
        let charSet = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
        var c = Array(charSet)
        var s:String = ""
        for n in (1...len) {
            s.append(c[Int(arc4random()) % c.count])
        }
        return s
    }
    
}

2.ViewController.swift

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        let funHelper = FunctionHelper()
        var number = funHelper.randomString(8) //取8位
        println("產生得亂碼:\(number)")
    }
}

參考來源:
https://gist.github.com/szhernovoy/276e69eb90a0de84dd90