下面是我之前如何将浮点值截断为小数点后两位的
NSLog(@" %.02f %.02f %.02f", r, g, b);
我查看了文件和Electron 书,但还没找到答案.谢谢
下面是我之前如何将浮点值截断为小数点后两位的
NSLog(@" %.02f %.02f %.02f", r, g, b);
我查看了文件和Electron 书,但还没找到答案.谢谢
到目前为止,我的最佳解决方案是David's response个:
import Foundation
extension Int {
func format(f: String) -> String {
return String(format: "%\(f)d", self)
}
}
extension Double {
func format(f: String) -> String {
return String(format: "%\(f)f", self)
}
}
let someInt = 4, someIntFormat = "03"
println("The integer number \(someInt) formatted with \"\(someIntFormat)\" looks like \(someInt.format(someIntFormat))")
// The integer number 4 formatted with "03" looks like 004
let someDouble = 3.14159265359, someDoubleFormat = ".3"
println("The floating point number \(someDouble) formatted with \"\(someDoubleFormat)\" looks like \(someDouble.format(someDoubleFormat))")
// The floating point number 3.14159265359 formatted with ".3" looks like 3.142
我认为这是最快捷的解决方案,将格式化操作直接与数据类型联系起来.很可能某个地方有一个内置的格式化操作库,也可能很快就会发布.请记住,该语言仍处于测试阶段.