在我的 Swift 3/Obj-C 应用程序中,我试图将 rootviewcontroller 的委托设置为其导航控制器,但出现以下错误:
无法将类型“NavController.Type”的值分配给类型“RootViewControllerDelegate”
导航控制器.swift
@available(iOS 10.0, *)
@objc class NavController: UINavigationController, RootViewControllerDelegate {
static func instantiate() -> NavController? {
let storyboard = UIStoryboard.init(name: "MyStoryboard", bundle: nil)
let navVC = storyboard.instantiateViewController(withIdentifier: "NavController") as? NavController
let rootVC = navVC?.viewControllers.first as! RootViewController
rootVC.delegate = self // <<<< ERROR OCCURS HERE
return navVC
}
func pressedNextButton()
{
NSLog("Next button works!")
}
}
RootViewController.swift
@objc protocol RootViewControllerDelegate {
func pressedNextButton()
}
@available(iOS 10.0, *)
@objc class RootViewController: UIViewController, NSFetchedResultsControllerDelegate, UITableViewDataSource, UITableViewDelegate {
var delegate: RootViewControllerDelegate?
@IBAction func nextButton(_ sender: UIBarButtonItem) {
self.delegate?.pressedNextButton()
}
}
主程序.m
@interface MYQAddDeviceViewController ()
@property (nonatomic, strong) NavController * navVC;
@end
- (void)viewDidLoad
{
[super viewDidLoad];
self.navVC = [NavController instantiate];
}
关于如何解决该错误的任何想法?