无法推断出通用参数S.

Question

无法推断出通用参数S.

 var buff:[Int8] = [Int8](repeating:0,count:16)
 ...
 var addr = String(bytes: buff, encoding: String.Encoding.utf8)

How it seems in xCode

Answer 1

根据the documentation，buff需要为S : Sequence, S.Iterator.Element == UInt8的S类型。所以你需要它是一个UInt8的数组而不是Int8＆＃39>

import Foundation

var buff:[UInt8] = [UInt8](repeating:0,count:16)
var addr = String(bytes: buff, encoding: .utf8)