发送来自objectivec的通知并在swift中接收

Question

Trying to send notification from objective c and receive in swift. I see no error from sender or receiver and function is not called in target view controller

ViewController 1: Objective c

    [[NSNotificationCenter defaultCenter]
     postNotificationName:@"notifyme"
     object:self
     userInfo:self.profile];

ViewController 2: swift

override func viewDidLoad() {
    super.viewDidLoad()
    print("view did load")
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "receiveNotification:", name: "notifyme", object: nil)

}

func receiveNotification(ns: NSNotification){
    print("Received Notification")

}

Answer 1

In Swift3, I Solved this problem

Send OC

[[NSNotificationCenter defaultCenter] postNotificationName:"You NotificationName" object:nil];

Receive Swift 3

func applicationDidBecomeActive(_ application: UIApplication) {
    NotificationCenter.default.addObserver(self, selector: #selector(self.handleNotification), name: NSNotification.Name.init(rawValue: "You NotificationName"), object: nil)
}
func handleNotification() -> Void {

}

Answer 2

Follow this steps:

First Of all add this in your ViewController.swift which is your first view:

override func viewDidLoad() {
    super.viewDidLoad()
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "receiveNotification:", name: "notifyme", object: nil)
}

func receiveNotification(ns: NSNotification){
    print("Received Notification")
}

After that add a new class in Obj-c and don't forget to create bridging header for that class.

In bridging header file add import your SecondViewController this way:

#import "SecondViewController.h"

And in your SecondViewController.m add this code when you go back to your swift viewController.

- (IBAction)goBack:(id)sender {

    [[NSNotificationCenter defaultCenter]
     postNotificationName:@"notifyme"
     object:nil
     userInfo:nil];
    [self dismissViewControllerAnimated:NO completion:nil];
}

For more Info check THIS sample project.

Update:

If first controller is objective c and second/target controller is swift.

FirstViewController.m

#import "FirstViewController.h"

@interface FirstViewController ()

@end

@implementation FirstViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(receiveTestNotification:)
                                                 name:@"TestNotification"
                                               object:nil];
}

- (void) receiveTestNotification:(NSNotification *) notification
{
    if ([[notification name] isEqualToString:@"TestNotification"])
        NSLog (@"Successfully received the test notification!");
}
@end

SecondViewController.swift

@IBAction func goBack(sender: AnyObject) {

    NSNotificationCenter.defaultCenter().postNotificationName("TestNotification", object: nil, userInfo: nil)
    self.dismissViewControllerAnimated(true, completion: nil)
}

Bridging-Header.h

#import "FirstViewController.h"

Sample code