CODEWITHSUNDEEP
iosobjective-cswiftapple-watch
Jason Wade
Jason Wade

Reputation: 87

I have an Objective-C application on iOS, how do I build a Swift Watch extension?

I'm updating an old Objective-C app to include an Watch Extension written in Swift.

I was sure to change the Embedded Content Contains Swift Code default: enter image description here

I have the following header file:

#import <Foundation/Foundation.h>

@interface Elements : NSObject
// designated initializer
-(instancetype)initWithElement:(NSString *)atom
                     AndNumber:(NSNumber *)number;
+(NSDictionary *) elementInfo;
+(NSArray *) atomArray;
@property (strong, nonatomic) NSNumber *mass;
@property (strong, nonatomic) NSString *name;
@property (strong, nonatomic) NSString *ChemicalName;
@end

How can I use the above Elements Object, within my Swift Watch extension?

Now I have the following error:

enter image description here

Upvotes: 2

Views: 1486

Answers (2)

Atif
Atif

Reputation: 286

You need to have a bridge header file (Xcode will ask to create it for you first time you try to mix obj-c with swift). If you didn't let Xcode create it for you, you will have to create it yourself and then go to build setting for all targets and set under swift compiler -> code generation -> add to 'Objective-C Bridging Header': Bridging-Header-FileName.h. Once header is ready, import all Obj-C header you need to access in Swift.

Upvotes: 5

Fogh
Fogh

Reputation: 1295

To use Objective-C code in your Swift code you need to add a Objective-C Bridging Header to your project.

Using Swift with Cocoa and Objective-C

Upvotes: 0

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