A Boolean value indicating whether the operation is currently executing.
Mac Catalyst 13.0+Beta
The value of this property is YES if the operation is currently executing its main task or NO if it is not.
When implementing a concurrent operation object, you must override the implementation of this property so that you can return the execution state of your operation. In your custom implementation, you must generate KVO notifications for the isExecuting key path whenever the execution state of your operation object changes. For more information about manually generating KVO notifications, see Key-Value Observing Programming Guide.
You do not need to reimplement this property for nonconcurrent operations.
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.