iPhone - a delay between operations in the queue

Question

I am adding operations to the queue using something like this

NSInvocationOperation *operation0 = [[NSInvocationOperation alloc] 
initWithTarget:self
selector:@s         


        

Answer 1

you can do like following manner

[operation0 addDependancy:operation1];
[operation1 addDependancy:operation2];

and now add [NSThread sleepforTimeInterval:5] to at the end of each task