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SWIFT 3
//Custom view/cell say LocationPickerView (: UIView)
SWIFT 2
//**************** BLOCK WITHOUT PARAMETER
//Custom view/cell say LocationPickerView (: UIView)
typealias blockDefination_DepatureCityAction = (_ button : UIButton) -> Void
var handler_DepatureCityAction:blockDefination_DepatureCityAction?
@IBAction func btnDepatureCityAction(_ sender: UIButton) {
if(self.responds(to: #selector(getter: LocationPickerView.handler_DepatureCityAction))){
self.handler_DepatureCityAction?(sender)
}
}
//View controller where you want callback
let locationPickerObject = LocationPickerView(frame: viewLocation.bounds)
locationPickerObject.handler_DepatureCityAction = { button in
locationPickerObject.handler_DepatureCityAction = { button in
print("DepatureCityAction in view controller")
print(button)
}
//**************** BLOCK WITHOUT PARAMETER
//DECLARE as property
- typealias completionBlockSeeMore = () -> Void
- var cMoreButtonCallBack:completionBlockSeeMore?
- if(self.respondsToSelector("cMoreButtonCallBack")){ self.cMoreButtonCallBack!() }
//USAGE
- cell.cMoreButtonCallBack = { () -> Void in
printf("Callback in block")
}
///*** ******BLOCK WITH PARAMETER
- typealias completionBlockSeeMore = (sender: UIButton) -> Void
- var cMoreButtonCallBack:completionBlockSeeMore?
- if(self.respondsToSelector("cMoreButtonCallBack")){ self.cMoreButtonCallBack!(sender: sender) }
//USAGE
- cell.cMoreButtonCallBack = { (sender: UIButton) -> Void in
print("callback in block \(sender)")
}
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