what is different between init() and init(_:bool)

Question

var LocalFile = "xxx.json"
var Delta = false
var priority = DISPATCH_QUEUE_PRIORITY_DEFAULT

init(){
    priority = DISPATCH_QUEUE_PRIORITY_HIGH
}

init(_:Bool){
    Delta = true
    priority = DISPATCH_QUEUE_PRIORITY_LOW
}

func getList(postData: Dictionary<String, String>){

    let localdata = readfile(LocalFile)
    if (localdata != "" && Delta == false){}
    else{
    }
}

I am just a beginner for learning Swift. When I look through this class, I wonder why this class contains 2 init()? How does it work with "priority"?

Answer 1

init(){
    priority = DISPATCH_QUEUE_PRIORITY_HIGH
}

1. It is a default constructor. It means your instance variable will be initialized by default with their respective values.

2. Here the priority is HIGH (DISPATCH_QUEUE_PRIORITY_HIGH)

   init(_:Bool){
      Delta = true
      priority = DISPATCH_QUEUE_PRIORITY_LOW
   }
   

1 . It is parameterised, constructor. It means you are initializing Delta while you are creating object of this class.

2 . Here the priority is LOW (DISPATCH_QUEUE_PRIORITY_LOW)