nullable ? Swift – Objective C

Did you ever think ? what will happen if your Objective C function will return nil to Swift function ? because there is optional in Swift for managing nil values but in Objective C nothing.

//Objective-C code 
#import <Foundation/Foundation.h> 
@interface ObjCHello : NSObject 
-(NSArray * )getValue; 
@end  

//Swift code 
let objc = ObjCHello() 
print(objc.getValue()) 

//Objective-C 
#import <Foundation/Foundation.h> 
@interface ObjCHello : NSObject 
-(NSArray * _Nullable)getValue; 
@end

Now it will return value [Any]? and it won’t crash so just go for optional chaining.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s