Detect UILabel text change in swift

Question

Is there a way to get notified when there is a change in a UILabel's text or would I be better off using a UITextField with userInteractionEnabled set to false and using its UIControlEditingChanged event to fulfil my purpose?

For ex. I need to run certain lines of code every time I change the UILabel's text and accordingly. So instead of writing those 100 lines of almost similar code for every case I change the UILabel's text, I wish to write it together in one place and call it every time the UILabel is changed. I don't even know if that makes any sense. Forgive me but I cannot expose much of the code.

Answer 1

Create a class that inherits from UILabel. Such as:

class YourLabel: UILabel {      override var text: String? {         didSet {             if let text = text {                 println("Text changed.")             } else {                 println("Text not changed.")             }         }     } } 

Create a outlet of this class for your object.

@IBOutlet weak var label: YourLabel! label.text = "abc"