access objective-c exception in finally block

Question

Given the following situation:

@try {
    @try {
        // raises an exception :)
        [receiver raisingFirstException];
    } @finally {
        // raises another exception :)
        [otherReceiver raisingFinalException];
    }
} @catch (id e) {
    printf("exception: %s\n", [[e stringValue] cString]);
}

Is there any way to either get the first exception within the @finally block or to get both exceptions within the @catch block?

I have code where the @finally block does some checks which may raise an exception but I don't want to loose the original exception (the root cause).

If there was no original exception but the checks fail I want the exception they throw.

Answer 1

The best way to do this is to assign the exception to a variable that is accessible from the rest of your block.

NSException *ex;
@try {
    @try {
        [someObject methodWhichCouldThrowException];
    } @catch (NSException *e) {
        ex = e;
    } @finally {
        [anotherObject methodWhichCouldThrowADifferentException];
    }
} @catch (NSException *e) {
    // From here you can access both the exception thrown by 'someObject'
    // as well as the exception thrown by 'anotherObject'.
}