Функция задержки на Swift
Очень приятный синтаксический сахар - функция для запуска кода с задержкой через Grand Central Dispatch с помощью dispatch_after:
Swift 2:
/**
Delay function using GCD. Syntax sugar.
- parameter delay: delay in seconds
- parameter closure: closure code to execute after delay
*/
func delay(delay:Double, closure:()->()) {
dispatch_after(
dispatch_time(
DISPATCH_TIME_NOW,
Int64(delay * Double(NSEC_PER_SEC))
),
dispatch_get_main_queue(), closure)
}
Swift 3:
/**
Delay function using GCD. Syntax sugar.
- parameter delay: delay in seconds
- parameter closure: closure code to execute after delay
*/
func delay(_ delay:Double, closure:()->()) {
let when = DispatchTime.now() + delay
DispatchQueue.main.asyncAfter(deadline: when, execute: closure)
}
Использование:
delay(0.4) {
// код
}