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

Question

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)

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

对不起,我是Swift的新手,感谢您的任何建议!

PS我正在关注本教程:链接

Answer 1

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)

或者干脆

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