I'm new to Swift and OS X programming.
I am creating a desktop application with two view controllers, which are in a split view controller. How can I get access to the instances in another controller and change its attributes?
An example:
We have a drawing application, one view is canvas, the other is tools. There is a 'clear' button in tool view, how to set the canvas clear when click on this button?
You can try to use singleton pattern in your code. When you create the view controller, put the var out of the class like:
var fooViewController = FooViewController(...)
class FooViewController{
...
}
Then you can use the fooViewController anywhere in your project.
If you are working with storyboard, you can try some code like this:
var story = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle())
var view:MainTabViewController = story.instantiateViewControllerWithIdentifier("MainTab") as MainTabViewController
Hope this can be helpful.
You can use delegates and protocols! Link to Official Apple Documentation
Heres a quick example:
protocol toolsProtocol {
func pressedClear()
}
var delegate : toolsProtocol
In your canvas class
class Canvas: UIViewController, toolsProtocol {
Tools.delegate = self
func pressedClear() {
// Insert stuff happens here
}
}