这样使用委托怎么样？本示例将更改按钮的标题。
@objc protocol SomeDelegate {
func changeTitle(title: String)
}
class ViewController: NSViewController {
weak var delegate: SomeDelegate?
@IBAction func myAction(sender: AnyObject) {
delegate?.changeTitle("NewTitle")
}
}
class MainWindowController: NSWindowController, SomeDelegate {
@IBOutlet weak var myButton: NSButton!
override func windowDidLoad() {
super.windowDidLoad()
// Implement this method to handle any initialization after your window controller's window has been loaded from its nib file.
let myVc = window!.contentViewController as! ViewController
myVc.delegate = self
}
func changeTitle(title: String) {
myButton.title = title
}
}
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