การสร้างตัวดำเนินการมัดด้วยพารามิเตอร์

เพียงข้อเสนอแนะ:

infix operator ~> {}

private let queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0)

func ~> (backgroundClosure: () -> (), secondParam: (delayTime:Double, mainClosure: () -> () )) {
    // you can use the `delayTime` here
    dispatch_async(queue) {
        backgroundClosure()
        dispatch_async(dispatch_get_main_queue(), secondParam.mainClosure)
    }
}

วิธีใช้:

{ print("executed in background thread") } ~> (0.25, { print("executed in main thread") })

ลองสิ่งนี้:

private let queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0)

infix operator ~>{ associativity left precedence 140}

func ~> (backgroundClosure: ()->() , mainClosure: ()->()) {
dispatch_async(queue) { () -> Void in
    backgroundClosure()
    dispatch_async(dispatch_get_main_queue(), { () -> Void in
        mainClosure()
    })
}}