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# MXCrashDiagnosticObjectiveCExceptionReason

An object that represents the exception reason for an uncaught ObjC exception.

```
class MXCrashDiagnosticObjectiveCExceptionReason
```

## Overview

The crash report for an uncaught Objective-C <doc://com.apple.documentation/documentation/Foundation/NSException> can contain detailed information about the type, name and description of the exception object. Use the properties and methods on [`MXCrashDiagnosticObjectiveCExceptionReason`](/documentation/MetricKit/MXCrashDiagnosticObjectiveCExceptionReason) to access this information.

## Topics

### Generating a report

[`dictionaryRepresentation()`](/documentation/MetricKit/MXCrashDiagnosticObjectiveCExceptionReason/dictionaryRepresentation())

[`jsonRepresentation()`](/documentation/MetricKit/MXCrashDiagnosticObjectiveCExceptionReason/jsonRepresentation())

Returns the contents of the exception reason in JSON format.

### Reading the data

[`arguments`](/documentation/MetricKit/MXCrashDiagnosticObjectiveCExceptionReason/arguments)

[`className`](/documentation/MetricKit/MXCrashDiagnosticObjectiveCExceptionReason/className)

[`composedMessage`](/documentation/MetricKit/MXCrashDiagnosticObjectiveCExceptionReason/composedMessage)

[`exceptionName`](/documentation/MetricKit/MXCrashDiagnosticObjectiveCExceptionReason/exceptionName)

[`exceptionType`](/documentation/MetricKit/MXCrashDiagnosticObjectiveCExceptionReason/exceptionType)

[`formatString`](/documentation/MetricKit/MXCrashDiagnosticObjectiveCExceptionReason/formatString)


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