如何在 swift 中比较开关语句控制表达式及其模式

Question

我试过这个，但它不起作用：

    let value1 = 12
    let sumOfOtherValues = 10 + 1 + 24
    switch value1 {
    case let (value1,sumOfOtherValues) where (value1 > sumOfOtherValues):
         break;
    case value1..>sumOfOtherValues:
         break;
    default:
         breaK;
    }

我真的很想在 switch 语句而不是 if 语句中做到这一点。

Answer 1

这是你需要的吗？（我不明白你需要value1..>sumOfOtherValues

let value1 = 12
let sumOfOtherValues = 10 + 1 + 24
switch value1 {
case _ where sumOfOtherValues > value1:
    println("case 1")
    //break //it's not mandatory. 
    fallthrough //Without this code, this will stop here if the switch match this case. If you want that your switch continue to search, add 'fallthrough' at the end of each case
case _ where value1 > sumOfOtherValues:
    println("case 2")
    break
default:
    break
}