Friday, December 2, 2022

#1 2022-11-19 11:58:17 pm

Registered: 2017-12-14
Posts: 302

Anyone tried working with NSXPCConnection - Also BLOCKs

I'm looking at creating my 1st XPC Helper in Xcode. 
And I'd like to be able to call it from AppleScript as well as my Obj-C Code.

Has anyone tried it?   
It seems like I should be able to translate the code and execute it from AppleScript.
The only problem I see is the Block Reply:

From Xcode Template:


#import <Foundation/Foundation.h>

// The protocol that this service will vend as its API. This header file will also need to be visible to the process hosting the service.
@protocol DJ_K_Tel_XPC_HelperProtocol

// Replace the API of this protocol with an API appropriate to the service you are vending.
-(void)upperCaseString:(NSString*)aString withReply:(void (^)(NSString*))reply;


To use the service from an application or other process, use NSXPCConnection to establish a connection to the service by doing something like this:

_connectionToService = [[NSXPCConnection alloc] initWithServiceName:@"com.technomorph.DJ-K-Tel-XPC-Helper"];
_connectionToService.remoteObjectInterface = [NSXPCInterface interfaceWithProtocol:@protocol(DJ_K_Tel_XPC_HelperProtocol)];
[_connectionToService resume];

Once you have a connection to the service, you can use it like this:

[[_connectionToService remoteObjectProxy] upperCaseString:@"hello" withReply:^(NSString *aString) {
// We have received a response. Update our text field, but do it on the main thread.
NSLog(@"Result string was: %@", aString);
And, when you are finished with the service, clean up the connection like this:

[_connectionToService invalidate];

Anyone figured out any workarounds for Blocks?



#2 2022-11-20 12:32:34 am

Registered: 2017-12-14
Posts: 302

Re: Anyone tried working with NSXPCConnection - Also BLOCKs

I'm not sure if the NSXPCInterface protocol must return void as I could try to return a NSString



Or maybe I could use a pointer?


-(void)upperCaseString:(NSString*)aString withPointer:(NSString**)reply;



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