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This chapter is from the book


In this hour you have seen the messaging structure that is at the heart of Objective-C. It is not just another way of talking about the calling of methods that other languages use; it is a different way of constructing software. You see in later hours how the messaging architecture helps to implement dynamic aspects of Objective-C programs.

The common alloc and init methods have been used in this hour as examples. You have also seen how you can work with them and construct a hierarchy of designated and secondary initializers to construct your run-time objects.

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