找不到类型'String'的初始值设定项，它接受类型'的参数列表（格式：字符串，参数：UInt32

I created a playground in Xcode 6.3 (6D570) and input these following code:

我在Xcode 6.3（6D570）中创建了一个游乐场并输入以下代码：

import UIKit
var randum_num = arc4random_uniform(13) + 1
String(format: "card%i", arguments: randum_num)

And I got this error:

我收到了这个错误：

cannot find an initializer for type 'String' that accepts an argument list of type '(format: String, argument: UInt32

Sorry I'm complete new in Swift, thanks for any advices!

对不起，我是Swift的新手，感谢任何建议！

P.S. I'm following this tutorial: link

附：我正在学习本教程：链接

1 个解决方案

You just have to omit "arguments:". Try like this:

你只需要省略“参数：”。试试这样：

let randum_num = arc4random_uniform(13) + 1
String(format: "card%i",  randum_num)

or simply

或简单地说

String(format: "card%i",  arc4random_uniform(13) + 1)

You just have to omit "arguments:". Try like this:

你只需要省略“参数：”。试试这样：

let randum_num = arc4random_uniform(13) + 1
String(format: "card%i",  randum_num)

or simply

或简单地说

String(format: "card%i",  arc4random_uniform(13) + 1)