度量格式化程序:值和单位之间的空间

Question

我有一个Measurement属性：

let measurement = Measurement(value: 10000.0, unit: UnitMass.grams)

我想打印为字符串。我使用以下MeasurementFormatter：

let measurementFormatter = MeasurementFormatter()
measurementFormatter.unitStyle = .short
measurementFormatter.numberFormatter.numberStyle = .decimal
print(measurementFormatter.string(from: measurement))

打印10,000g.

如何让它打印10,000 g，即在值和单位之间留一个空格？

Answer 1

问题是您使用的是样式.short。只需注释掉这一行，它应该在它们之间显示一个空格：

let measurement = Measurement(value: 10000, unit: UnitMass.grams)
let measurementFormatter = MeasurementFormatter()
// measurementFormatter.unitStyle = .short
measurementFormatter.unitOptions = .providedUnit
measurementFormatter.numberFormatter.numberStyle = .decimal
print(measurementFormatter.string(from: measurement))    // "10,000 gn"