Swift - Custom setter on property
Solution 1:
You can't use set like that because when you call self.document = newValue you're just calling the setter again; you've created an infinite loop.
What you have to do instead is create a separate property to actually store the value in:
private var _document: UIDocument? = nil
var document: UIDocument? {
get {
return self._document
}
set {
self._document = newValue
useDocument()
}
}
Solution 2:
Here's a Swift 3 version
var document : UIDocument? {
didSet {
useDocument()
}
}