Default value of maxConcurrentOperationCount for NSOperationQueue

ios, nsoperation, nsoperationqueue, objective-c

Solution

From the documentation,

The maximum number of concurrent operations set explicitly on the receiver using the setMaxConcurrentOperationCount: method. If no value has been explicitly set, this method returns NSOperationQueueDefaultMaxConcurrentOperationCount by default.

So it is `NSOperationQueueDefaultMaxConcurrentOperationCount`. If this is set, it will choose an appropriate value based on the number of available processors and other relevant factors.

This is how it is defined:

enum {
  NSOperationQueueDefaultMaxConcurrentOperationCount = -1
};

NSOperationQueueDefaultMaxConcurrentOperationCount: The default maximum number of operations is determined dynamically by the NSOperationQueue object based on current system conditions.

Problem

Original source