Changing Parameter Type for Delegate Methods

Question

I have a NSURL delegate method which takes in NSInteger as the parameter

- (void)connection:(NSURLConnection *)connection didSendBodyData:(NSInteger)bytesWritten totalBytesWritten:(NSInteger)totalBytesWritten totalBytesExpectedToWrite:(NSInteger)totalBytesExpectedToWrite 

NSInteger which is a signed long has a range of -2147483647 to 2147483647. My issue is that sometimes i am getting values which exceed the positive range and this causes the value to go to a negative number which i don't want.

So i changed the NSInteger to NSUInteger

 - (void)connection:(NSURLConnection *)connection didSendBodyData:(NSUInteger)bytesWritten totalBytesWritten:(NSUInteger)totalBytesWritten totalBytesExpectedToWrite:(NSUInteger)totalBytesExpectedToWrite 

My question is whether it is ok to make such a change ? I haven't had any issues so far, the method is being called and i am getting the expected results.

I am concerned about some unforeseen issues that might occur.

Answer 1

It's fine to do this. Changing NSInteger to NSUInteger performs just an ordinary casting. However, I would keep NSInteger as a method parameter and then I would cast it explicitly at the beginning of method implementation to NSUInteger.