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MasteringOpenCV / code

Code for the book "Mastering OpenCV with Practical Computer Vision Projects" by Packt Publishing 2012.
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Check that the return value is nil before attempting to do anything with... #32

Closed SSteve closed 10 years ago

SSteve commented 10 years ago

... the NSError object

Apple's Error Handling Programming Guide (https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/ ErrorHandlingCocoa/CreateCustomizeNSError/CreateCustomizeNSError.html) states that return values must be checked for nil or NO before attempting to do anything with the NSError object