Exception handling in Objective-C

Objective-C provide exception handling to handle exceptional conditions so that code can be easier to write, easy to detect exceptions in the code and easier to maintain as well.

Exception handling in Objective-C

Exception handling in Objective-C

     

Objective-C provide exception handling to handle exceptional conditions so that code can be easier to write, easy to detect exceptions in the code and easier to maintain as well. To take support of exception handling make sure the -fobj-exceptions flag is turned on.

These are four compiler directives that are used for exception handling-
1. @try: block of code that can throw an exception.

2. @catch: define block of code to handle exception thrown by try block, this is usually an NSException object.

3. @finally: defines a block of code that executed whether an exception is thrown or not.

4. @throw: once your program detects an exception, it must propagate the exception to code that handles it. This code is called the exception handler. This entire
   process of propagating an exception is referred to as "throwing an exception?.

Figure: Flow of Exception handling in Objective-C

 

Tutorials

  1. Class level access
  2. Objective-C program with multiple parameter
  3. Objective C Tutorial
  4. Objective C Introduction
  5. Why Objective C?
  6. Objective C Hello World
  7. Objective C on Windows
  8. Objective C on Mac
  9. Compiling Objective C
  10. Categories
  11. Posing
  12. Exception handling in Objective-C
  13. Objective-C Inheritance
  14. Dynamic Types in Objective-C
  15. Objective-c memory management: retain and release
  16. Objective-c Dealloc
  17. Objective C
  18. Message Expressions and comments
  19. Class and Method declaration and definitions
  20. Objective-C keywords
  21. Objective C Constructors
  22. Access Modifiers and Garbage Collection