Question

Is there a proper way to catch exceptions within block code?

I got the following code:

void(^callback(int) = ^(int respond){
   [self DoSomethingWithRespond:respond]; //this throws an exception
};

-(void)DoSomethingWithRespond:(int)respond{
   if(respond == 400){
     NSException *exception = [NSException 
                              exceptionWithName:@"Failed" 
                              reason:logMessage 
                              userInfo:nil];
     @throw exception
   }
}

The callback methods gets called from another thread. If the respond is equal to 400 the DoSomethingWithRespond method will throw an exception.

Answer 1

    @try {
        <#statements#>
    }
    @catch (NSException *exception) {
        <#handler#>
    }
    @finally {
        <#statements#>
    }