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# NSInvocationOperation

An operation that manages the execution of a single encapsulated task specified as an invocation.

```
@interface NSInvocationOperation : NSOperation
```

## Overview

The [`NSInvocationOperation`](/documentation/Foundation/NSInvocationOperation) class is a concrete subclass of [`Operation`](/documentation/Foundation/Operation) that you use to initiate an operation that consists of invoking a selector on a specified object. This class implements a non-concurrent operation.

For more information on concurrent versus non-concurrent operations, see [`Operation`](/documentation/Foundation/Operation).

## Topics

### Initialization

[`initWithTarget:selector:object:`](/documentation/Foundation/NSInvocationOperation/initWithTarget:selector:object:)

Returns an `NSInvocationOperation` object initialized with the specified target and selector.

[`initWithInvocation:`](/documentation/Foundation/NSInvocationOperation/initWithInvocation:)

Returns an `NSInvocationOperation` object initialized with the specified invocation object.

### Getting Attributes

[`invocation`](/documentation/Foundation/NSInvocationOperation/invocation)

The receiver’s invocation object.

[`result`](/documentation/Foundation/NSInvocationOperation/result)

The result of the invocation or method.

### Constants

[Result Exceptions](/documentation/Foundation/result-exceptions)

Names of exceptions raised by `NSInvocationOperation` if there is an error when calling the [`result`](/documentation/Foundation/NSInvocationOperation/result) method.


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