How do I check for an error after ?
I have this code in my project:
id mappedData = [dataWithContentsOfMappedFile: path]
Obviously, if mappedData is nil it didn't succeed. But how can I get details about why it didn't succeed? There's no dataWithContentsOfMappedFile:withError:.
Use -dataWithContentsOfFile:options:error:, passing the NSDataReadingMapped constant in the options parameter.
(This constant is known as NSMappedRead if you're not compiling against the iOS 4.0 SDK.)