[Swift] Calling Swift Function in Objective-C Class

I have a service written in Objective-C and my App in Swift. Here's how to call Swift Functions from Objective-C files.

Step 1:

In your Objective-C .m file where you want to add the Swift function, make sure you import the Swift Header: 

1	#import "{Poduct Module Name}-Swift.h"

You can check your Product Module Name in the project Build Settings. For Example if your Product Module Name is "Hello_World", you will need to #import "Hello_World-Swift.h"

Step 2 Sample Swift Code:

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@objc class testClass: UITableViewController { func printTest(){ println("Hello From Swift") } }

Step 3, Call Swift Class in Objective-C method like so:

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- (void) actionCompleted { [[NSNotificationCenter defaultCenter] postNotificationName:@"actionCompleted" object:self]; testClass *daTestClass = [[testClass alloc] init]; [daTestClass printTest]; }

You cannot import {PMN}-Swift.h into Objective C Header. To do that you must forward declaration as  mentioned here under "Referencing a Swift Class or Protocol in an Objective-C Header"