How to stop enumerateObjectsUsingBlock Swift

Question

How do I stop a block enumeration?

    myArray.enumerateObjectsUsingBlock( { object, index, stop in
        //how do I stop the enumeration in here??
    })         


        

Answer 1

The accepted answer is correct but will work for NSArrays only. Not for the Swift datatype Array. If you like you can recreate it with an extension.

extension Array{
    func enumerateObjectsUsingBlock(enumerator:(obj:Any, idx:Int, inout stop:Bool)->Void){
        for (i,v) in enumerate(self){
            var stop:Bool = false
            enumerator(obj: v, idx: i,  stop: &stop)
            if stop{
                break
            }
        }
    }
}

call it like

[1,2,3,4,5].enumerateObjectsUsingBlock({
    obj, idx, stop in

    let x = (obj as Int) * (obj as Int)
    println("\(x)")

    if obj as Int == 3{
        stop = true
    }
})

or for function with a block as the last parameter you can do

[1,2,3,4,5].enumerateObjectsUsingBlock(){
    obj, idx, stop in

    let x = (obj as Int) * (obj as Int)
    println("\(x)")

    if obj as Int == 3{
        stop = true
    }
}