An NSOperation that controls its own finish - useful for operations that use async code (NSConnection etc.). Override start (and call base), then call [self finish] when done.

XOp.h

#import <Foundation/Foundation.h>

@interface XOp : NSOperation

- (void)finish;
@end

XOp.m

#import "XOp.h"



@implementation XOp {
  BOOL _isExecuting;
	BOOL _isFinished;
}

- (void)start {

	[self willChangeValueForKey:@"isExecuting"];
	_isExecuting = YES;
	[self didChangeValueForKey:@"isExecuting"];
}

- (BOOL)isConcurrent {
	return NO;
}

- (BOOL)isExecuting {
	return _isExecuting;
}

- (BOOL)isFinished {
	return _isFinished;
}

- (void)finish {

	[self willChangeValueForKey:@"isExecuting"];
	[self willChangeValueForKey:@"isFinished"];

	_isExecuting = NO;
	_isFinished = YES;

	[self didChangeValueForKey:@"isExecuting"];
	[self didChangeValueForKey:@"isFinished"];
}

@end