Importing a Swift protocol in Objective-C class

Question

I try to import a Swift Protocol named AnalyticProtocol into an Objective-C class named AnalyticFactory.

protocol AnalyticProtocol
         


        

Answer 1

We can use swift protocols in Objective C with few changes to the code. Also, @objc declared protocols let you have optional and required methods without default implementations. It comes with pros and cons.

We could actually re-name the protocol name to a more descriptive when using in Objective C. I make use of "@objc(alias_name)".

Here is the code, Let's have a swift protocol with @objc attribute and alias name to use in the ObjC code.

@objc(ObjTableViewReloadable) protocol TableViewReloadable: class {
   func reloadRow(at index: IndexPath)
   func reloadSection(at index: Int)
   func reloadTable()
}

Now lets farword declare our protocol in .h file

@protocol ObjTableViewReloadable;

You can now conform to this protocol in .m file and add required methods implementation.

#import "MyApp-Swift.h"
@interface MyObjcViewController ()