将 NSDecimalNumber 转换为字符串

Question

如何将 NSDecimalNumber 值转换为字符串？

// Return type is NSDecimalNumber
var price = prod.minimumPrice // 10

// need a String
cell.priceLB.text = NSString(format:"%f", prod.minimumPrice) as String

Answer 1

您可以尝试其中的一些选项。他们都应该 return 10。还要检查为什么需要创建 NSString 格式化数字并将其转换为 String。

"\(price)"
String(describing: price)
NSString(format: "%@", price)

Answer 2

试试这个

var price = prod.minimumPrice    
cell.priceLB.text = "\(price)"
//or
cell.priceLB.text = String(describing: price)

Answer 3

NSDecimalValue 继承自 NSNumber。

NSNumber 有 stringValue 属性

var stringValue: String { get }

The number object's value expressed as a human-readable string.
The string is created by invoking description(withLocale:) where locale is nil.

Documentation Source

Answer 4

两种方式：

使用NumberFormatter
直接使用stringValue属性

使用固定为两位小数的 NumberFormatter 的代码：

Swift 5

let number = NSDecimalNumber(string: "1.1")
print(number.stringValue) //"1.1"

 let fmt = NumberFormatter()
  fmt.numberStyle = .none;
  fmt.minimumFractionDigits = 2;
  fmt.minimumIntegerDigits = 1;
  fmt.roundingMode = .halfUp;

let result = fmt.string(from: number) ?? "0.00"  
//1.10

将 NSDecimalNumber 转换为字符串

Convert NSDecimalNumber to String

objective-c

nsdecimalnumber

swift