First post, logging.

My first post. I guess it would be a good a idea to share what I do whenever I start a new project in Xcode.

It has kind of become a habit of mine to log to console at almost every method for easy bug tracking. However, using NSLog doesn't show you what method unless you do something like:

NSLog(@"MyViewController:viewDidLoad");

Which is rather cumbersome when you add logging to many methods. This is where my savior comes into the picture.

By adding the following to your "MyApp-Prefix.pch" file in the "Supporting Files"-group

// DLog is almost a drop-in replacement for NSLog

// DLog();

// DLog(@"here");

// DLog(@"value: %d", x);

// Unfortunately this doesn't work DLog(aStringVariable); you have to do this instead DLog(@"%@", aStringVariable);

#ifdef DEBUG

# define DLog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);

#else

# define DLog(...)

#endif

// ALog always displays output regardless of the DEBUG setting

#define ALog(fmt, ...) NSLog((@"%s [Line %d] " fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);

you can use ALog (always log) and DLog (debug log) for a rich debug logging.
Simply putting DLog(); in your viewDidAppear method will output something like:

[MainViewController viewDidAppear:] [Line 169]

Even showing the line number where in your source code the line was executed. And don't worry about performance or similar, when compiling for release DLog(); is defined to nothing so there will be no logging going on.

The blog post where I found this information is >>here

iOS

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