Re: Embedded blocks...

[陈北宗]

What do you want to access it for? Invoking it? Copying it?

If it is latter, just copying or retaining the outer block is adequate, as copying the outer block will cause the inner block be retained, which would copy it if it is a stack block.

On Oct 26, 2019, at 22:42, Gregory Casamento <address@hidden> wrote:

Hey Guys,

I am implementing the following class:

DEFINE_BLOCK_TYPE(NSBackgroundActivityCompletionHandler, void, NSBackgroundActivityResult);
DEFINE_BLOCK_TYPE(GSScheduledBlock, void, NSBackgroundActivityCompletionHandler);  

@interface NSBackgroundActivityScheduler : NSObject
{
  NSString *_identifier;
  NSQualityOfService _qualityOfService;
  NSTimeInterval _interval;
  NSTimeInterval _tolerance;
  BOOL _repeats;
  BOOL _shouldDefer;
}
 
- (instancetype) initWithIdentifier: (NSString *)identifier;

- (NSString *) identifier;
- (void) setIdentifier: (NSString *)identifier;

- (NSQualityOfService) qualityOfService;
- (void) setQualityOfService: (NSQualityOfService)qualityOfService;

- (BOOL) repeats;
- (void) setRepeats: (BOOL)flag;

- (NSTimeInterval) interval;
- (void) setInterval: (NSTimeInterval)interval;

- (NSTimeInterval) tolerance;
- (void) setTolerance: (NSTimeInterval)interval;

- (BOOL) shouldDefer;
- (void) setShouldDefer: (BOOL)flag;

- (void) scheduleWithBlock: (GSScheduledBlock)block;

- (void) invalidate;
 
@end

How do I handle the embedded block GSScheduledBlock??  Declaring it this way compiles, but I have no idea how to access the handler which is passed in.

Any clues?  

Thanks, GC

--

Gregory Casamento
GNUstep Lead Developer / OLC, Principal Consultant
http://www.gnustep.org - http://heronsperch.blogspot.com
http://ind.ie/phoenix/

Sender notified by Mailtrack 10/26/19, 10:39:17 AM

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