如何在Swift4中将NSNumber转换为String？

Question

如何将NSNumber数组转换为String数组以便在UITableView中显示值？

cell.textlabel.text = ?

码:

var a = [68.208983, 6.373902, 1.34085, 3.974012, 110.484001, 
         61.380001, 1.325202, 0.8501030000000001, 0.8501030000000001, 
         0.8501030000000001, 3.647296, 1.28503]

Answer 1

加上

.stringValue

到您的NSNumber变量

Answer 2

Double如果您没有明确注释它们，那么您发布的内容是一个数组。如果您发布的数组原样，那么您需要：

let arrayOfDoubles = [68.208983, 6.373902, 1.34085, 3.974012, 110.484001, 61.380001, 1.325202, 0.8501030000000001, 0.8501030000000001, 0.8501030000000001, 3.647296, 1.28503]
let stringArrayOfDoubles = arrayOfDoubles.map { String($0) }

或者，如果您显式地注释类型，[NSNumber]那么您将需要这个：

let arrayOfNumbers: [NSNumber] = [68.208983, 6.373902, 1.34085, 3.974012, 110.484001, 61.380001, 1.325202, 0.8501030000000001, 0.8501030000000001, 0.8501030000000001, 3.647296, 1.28503]
let stringArrayOfNumbers = arrayOfNumbers.map { $0.stringValue }