How can I stop a for each loop iteration if I need to call break inside a switch in Swift?

Question

How to stop for each loop? On return error message next loop should not run, stop the for each loop. So, it will handle sequentially error shown:

if let fields = data.keys ?? [] {
    for each in fields {
        switch each.key {
            case One:
              let errorOne =  errorValidation(id: each.id,name:each.name, keyValue: each.key)
                if errorOne.count > 0 {
                    // Stop For Each
                }
            case Two:
                let errorTwo =  errorValidation(id: each.id,name:each.name, keyValue: each.key)
                if errorTwo.count > 0 {
                    // Stop For Each
                }
            case Three:
                let errorThree =  errorValidation(id: each.id,name:each.name, keyValue: each.key)
                if errorThree.count > 0 {
                    // Stop For Each
                }
            default: break
        }
    }
}

---

func errorValidation(id: String, name: String, keyValue: String) -> String {
    var errorMessage = String()
    switch keyValue {
        case One:
            if name.isEmpty {
                errorMessage = "One Is Empty"
            }
        case Two:
            if name.isEmpty {
                errorMessage = "Two Is Empty"
            }
        case Three:
            if name.isEmpty {
                errorMessage = "Three Is Empty"
            }
        default: break
    }
    return errorMessage
    printVMSLog("Error \(errorMessage)") // Always Print Three IS Empty
}

Answer 1

What you are looking for is called labeled statements. You can name your loop and then you can specify which loop you would like to break:

if let fields = data.keys ?? []{
    fieldsLoop: for each in fields {
        switch each.key {
            case One:
              let errorOne =  errorValidation(id: each.id,name:each.name, keyValue: each.key)
                if errorOne.count > 0 {
                    break fieldsLoop
                }
            case Two:
                let errorTwo =  errorValidation(id: each.id,name:each.name, keyValue: each.key)
                if errorTwo.count > 0 {
                    break fieldsLoop
                }
            case Three:
                let errorThree =  errorValidation(id: each.id,name:each.name, keyValue: each.key)
                if errorThree.count > 0 {
                    break fieldsLoop
                }
            default: break
        }
    }
}