switch语句：在swift中从if语句转换为switch语句

我正试图从下面的if语句转换为switch语句，但我一直遇到错误

let meal = "breakfast"

if meal == "breakfast" {
    print("Good morning!")
} else if meal == "lunch" {
    print("Good afternoon!")
} else if meal == "dinner" {
    print("Good evening!")
} else {
    print("Hello!")
} 

这是我的转换声明：

switch meal {
let meal = "breakfast"

    case 1: 
        print("Good morning!”)
    case 2: 
        print("Good afternoon!")
    case 3: 
        print("Good evening!")
}

将此开关块放在代码中：

assign let mean=breaken在开关之前，您的案例应该包括字符串：case breaken等，并且您需要一个默认语句。

  let meal = "breakfast"

   switch meal {

   case "breakfast":

         print("Good morning")

   case "lunch":

          print("Good afternoon!")

   case "dinner":
          print("Good evening!")
   default:

          print("default case")
   }