@ ATLog

Usual logging with NSLog is quite boring because you need to convert all structures to NSString and use a correct specifier for each argument:

NSLog(@"Frame = %@", NSStringFromCGRect(view.frame));
NSLog(@"π = %f", 3.14f);

ATLog macro uses one universal specifier %@ for all types and automatically converts all arguments to NSString objects:

ATLog(@"Frame = %@", view.frame); // No need for NSStringFromCGRect 
ATLog(@"π = %@", 3.14f); // One '%@' specifier for all argument types

ATConcatLog

ATConcatLog macro uses arguments concatenation instead of specifiers replacement (like in dynamically-typed languages):

ATConcatLog(@"π=", 3.14f, @"; Σ=", 13); // π=3.140000; Σ=13

Supported types

For the full list of automatically-converted types see tests. Here are some examples:

ATConcatLog(@"\n RootViewController: ",     self.window.rootViewController,  
            @"\n Frame: ",                  self.window.frame,               
            @"\n Center: ",                 self.window.center,              
            @"\n Transform: ",              self.window.transform,           
            @"\n Alignment rect insects: ", self.window.alignmentRectInsets, 
            @"\n Is keyWindow: ",           self.window.keyWindow);          

RootViewController: (nil)
Frame: {{0, 0}, {320, 568}}
Center: {160, 284}
Transform: [1, 0, 0, 1, 0, 0]
Alignment rect insects: {0, 0, 0, 0}
Is keyWindow: YES

ATLog(@"%@", self.window.clearsContextBeforeDrawing); // YES
ATLog(@"%@", (bool)true);                             // true
ATLog(@"%@", NULL);                                   // (NULL)

ATLogEach

Another macro for easy logging. Each argument is logged in a separate line:

ATLogEach(@"Window properties:",
          self.window.frame,
          self.window.center,
          self.window.keyWindow);

0) Window properties:
1) {{0, 0}, {320, 568}}
2) {160, 284}
3) YES

ATPrettyLog

By default ATLog redirects its output to ATPrettyLog macro which produces nicer and more informative output than NSLog:

NSLog(@"NSLog produces not very useful output.");
ATPrettyLog(@"ATPrettyLog prints method name and line number.");
ATLog(@"ATLog uses ATPrettyLog by default.")

2013-08-22 23:14:16.258 Example[66227:c07] NSLog produces not very useful output.
23:14:16.261 -[AppDelegate logExample] [Line 20] ATPrettyLog prints method name and line number.
23:14:16.261 -[AppDelegate logExample] [Line 21] ATLog uses ATPrettyLog by default.

Redirecting ATLog output

You can change this default behavior by defining a ATLog_OUTPUT macro before importing ATLog.h file. Here are some examples for using NSLog or CocoaLumberjack instead of ATPrettyLog:

Redirect to NSLog:

#define ATLog_OUTPUT(fmt, args...) NSLog(fmt,args)
#import "ATLog.h"

ATLog(@"I use NSLog now.");

Redirect to CocoaLumberjack:

#define ATLog_OUTPUT(fmt, args...) DDLogVerbose(fmt,args)
#import "ATLog.h"

ATLog(@"I use CocoaLumberjack now.");

Requirements

• iOS 5.0+
• ARC

Author

Yan Rabovik (@rabovik on twitter)

License

MIT License.