Read e-book online Advanced Mac OS X Programming: The Big Nerd Ranch Guide (Big PDF

By Mark Dalrymple

ISBN-10: 0321706250

ISBN-13: 9780321706256

Whereas there are numerous books on programming for Mac OS X, Advanced Mac OS X Programming: the large Nerd Ranch Guide is the one person who includes reasons of ways to leverage the strong underlying applied sciences. This booklet will get all the way down to the genuine nitty-gritty. The 3rd version is up to date for Mac OS X 10.5 and 10.6 and covers new applied sciences like DTrace, tools, Grand principal Dispatch, blocks, and NSOperation.

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Many programmers forget Objective-C’s C heritage and fail to take advantage of C’s language features and libraries. ” Nine times out of ten, the poster actually wants to use Cocoa with an existing C API that 27 Chapter 1 C and Objective-C uses callbacks. ” Even though Objective-C methods are fundamentally C functions, you cannot use Objective-C methods as callbacks for a C API. When you send a message to an object, the compiler replaces your square-bracket method call with a function call to objc_msgSend() or one of its variants.

The runtime has been rewritten for 64-bit programming, which includes things like compatibility with C++ exceptions, discussed in Chapter 5: Exceptions, Error Handling, and Signals, and solving the fragile base class problem, discussed in Chapter 2: The Compiler. 0 has an optional garbage collector, which can be used instead of manual reference counting with retain, release, and autorelease. The garbage collector is general purpose enough to be used outside of Objective-C and is discussed in Chapter 7: Memory.

If you supply a bad format string to printf() or do not include the terminating sentinel value, the function processing the call stack could wander off into random data, causing a crash or data corruption. To help make calling variable argument functions safer, gcc lets you tag a function or a method declaration with __attribute__((sentinel)). Then, when your gcc command line includes the 15 Chapter 1 C and Objective-C flag, gcc will emit a warning if you fail to terminate the argument list with a zero pointer value like NULL or nil.

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Advanced Mac OS X Programming: The Big Nerd Ranch Guide (Big Nerd Ranch Guides) by Mark Dalrymple

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