Let's say we define an object like this:
let object: AnyObject = {
var result = UILabel(frame: CGRect(x: 0, y: 0, width: 150, height: 50))
result.text = "First Text"
result.backgroundColor = UIColor.blueColor()
return result
}()
For this example, I explicitly created a UILabel, but in my actual project I don't know what type of object is created, so I'm just treating the result as AnyObject for this example. The object is just a standard UILabel with text of "First Text" on a blue background, default aligned to the left.
In this example case, I know that this object is actually a UILabel, so I know I can change it's properties like this:
(object as UILabel).text = "Second Text"
And now I've changed the text. But in my actual project, I don't know that my object is a UILabel, so I can't just do the (object as UILabel) trick, because it's not always a UILabel. My way around that is using setValueForKey. After checking that my object has a member called "text" using respondsToSelector (not shown in this example), I can change the text this way:
object.setValue("Third Text", forKey: "text")
Now, if I wanted to change the textAlignment of the object, after checking that the object does indeed have a member called textAlignment, I'd want to do something like this:
object.setValue(NSTextAlignment.Center, forKey: "textAlignment")
Doing this results in an error though:
Type 'NSTextAlignment' does not conform to protocol 'AnyObject'
I ran into something similar while trying this approach with setting the frame, because it didn't like the CGRect type, but I was able to get around it by converting the CGRect to an NSValue. However, I can't find a way to fix it for enum types like NSTextAlignment.
Anybody know how I can achieve my goal here?
