Question

I am using the following code for nsoperation.The problem is all three tasks run serially.What can I do to make the tasks run in parallel.I tried implementing the start and isconcurrent methods but it doesnt work.please help…
Given is my uaview controller class

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    Store *S=[ [Store alloc] init];
    S.a=25;

    NSOperationQueue *someQueue = [NSOperationQueue currentQueue];

    someQueue.MaxConcurrentOperationCount = 3;

    NSInvocationOperation *invocationOp2 = [[NSInvocationOperation alloc]  initWithTarget:self
                                                                                 selector:@selector(ymain)
                                                                                   object:nil];

    NSInvocationOperation *invocationOp3 = [[NSInvocationOperation alloc]  initWithTarget:self
                                                                                 selector:@selector(ymain2)
                                                                                   object:nil];
    NSInvocationOperation *invocationOp4 = [[NSInvocationOperation alloc]  initWithTarget:self
                                                                                 selector:@selector(ymain3)
                                                                                   object:nil];


    [someQueue addOperation:invocationOp2];
    [someQueue addOperation:invocationOp3];
    [someQueue addOperation:invocationOp4];




}
-(void)ymain
{





    for (int i = 0 ; i < 10000 ; i++) {
        NSLog(@"in the A main");    }
}

This is the other class which was subclassed

@interface A : NSOperation

@end

@implementation A

bool executing;
bool finished;
-(void)main
{

}
- (BOOL)isConcurrent
{
    return YES;
}

- (BOOL)isReady
{
    return YES;
}

Answer 1

currentQueue is returning the main queue, which is a serial queue that executes on the main runloop. You should create your own NSOperationQueue to run the operations concurrently.