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Objective-C: Add an NSString pattern to NSException

 3 years ago
source link: https://www.codesd.com/item/objective-c-add-an-nsstring-pattern-to-nsexception.html
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Objective-C: Add an NSString pattern to NSException

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I am working on some API (Crittercism) to report handled exceptions in the client to server.

The client API takesNSException as the input parameter. I have to add some application context info string(NSString) also to theNSException before calling the API.

How I can do it using Objective-C.

NSString* appContextString;

NSString *test = @"test";
unichar a;
int index = 5;

@try {
    a = [test characterAtIndex:index];
}
@catch (NSException *exception) {
    // add app context to exception before reporting to Crittercism.
    [Crittercism logHandledException:exception];
}

I have to append appContextString to exception.

You could build a new NSException object from attributes of the old one, but that seems very messy. As you are just logging the handled exception, I would simply log the "app context" before that:

@try {
    a = [test characterAtIndex:index];
}
@catch (NSException *exception) {
    NSString *appContext = @"...";
    [Crittercism leaveBreadcrumb:appContext];
    [Crittercism logHandledException:exception];
}



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