Check NSOperationQueue is completed or Not?

bhavuk chawla

14 December 2016

When we put lots of images to NSOperationQueue then we want to check our queue is completed or not.After completion of queue you want to perform some tasks (like you want to load another page).

 (void) observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object
                         change:(NSDictionary *)change context:(void *)context{
    
    
    if (object == self.queue && [keyPath isEqualToString:@"operations"]) {
        if ([self.queue.operations count] == 0) {
         }
    }
    else {
        [super observeValueForKeyPath:keyPath ofObject:object
                               change:change context:context];
    }
}

(void) observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object

change:(NSDictionary *)change context:(void *)context{

if (object == self.queue && [keyPath isEqualToString:@"operations"]) {

if ([self.queue.operations count] == 0) {

}

else {

[super observeValueForKeyPath:keyPath ofObject:object

change:change context:context];

}