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CoreLib is a collection of reusable Objective-C source code to make various aspects of developing Mac and iOS applications easier.
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CoreLib is a collection of reusable Objective-C source code to make various aspects of developing Mac and iOS applications easier, faster & safer.

CoreLib is designed so you can just use the parts you want/need and are not forced to adopt all of it.

Just include CoreLib.h in your .pch and the files performing the tasks you are interested in.

CoreLib has these components:

  • categories on base Cocoa like NSArray, NSData, NSObject, NSString, etc for new functionality or syntactic sugar (AppKit+CoreCode, Foundation+CoreCode)

  • for iOS) subclasses for UIActionSheet, UIAlertView, etc to provide a more convenient block based interface or new view controllers (iOS/JM*)

  • for Mac) convenience classes for e-mail sending, getting host information, managing login items, showing styled font lists, etc (Mac/JM*)

  • categories on all Foundation&AppKit classes to provide properties instead of getters/setters. this is provided in the 10.10 SDK too, but we have it for pre Xcode 6 (AppKit+Properties, Foundation+Properties)

  • support for object subscripting with old SDKs where Apple doesn't support it (Foundation+Indexing)

  • support for generating warnings on invocation of methods/classes that are not available on your deployment target (CoreLib_Availability)

  • support for pseudo static typing in collection classes (for invoking properties on objects from collections without casting) and much more convenience stuff (CoreLib)


in your PCH file:

#import "CoreLib_Availability.h" // optional, for warnings on calls to unavailable methods
#import <Cocoa/Cocoa.h> // you had that before
#import "CoreLib.h"

in your applicationDidFinishLaunching: method:

cc = [CoreLib new]; // dont forget this


some examples how CoreLib makes developing apps more fun.

instead of

[[NSUserDefaults standardUserDefaults] objectForKey:@"MyPref"]



instead of

[[NSUserDefaults standardUserDefaults] setInteger:1 forKey:@"MyPref"];


@"MyPref".defaultInt = 1;

instead of

[@"abc\ndef\nbla" componentsSeparatedByCharactersInSet:[NSCharacterSet newlineCharacterSet]]



instead of

NSURL *url = [NSURL URLWithString:@"http://myhost/myfile"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
NSData *file = [NSURLConnection sendSynchronousRequest:request returningResponse:NULL error:NULL];


NSData *file = @"http://myhost/myfile".download;

there are many more convenience methods including some functional extensions for NSArray.


some features of CoreLib require linking additional frameworks and are therefore only available if you include these framework and set some preprocessor value: #define USE_SECURITY 1 // if you link Security.framework #define USE_SYSTEMCONFIGURATION 1 // if you link SystemConfiguration.framework #define USE_IOKIT 1 // if you link IOKit.framework #define USE_DISKARBITRATION 1 // if you link DiskArbitration.framework

#define USE_APPLEMAIL 1 // if you have the ScriptingDefinition for 

#define USE_SNAPPY 1 // if you link Snappy.framework
#define USE_MAILCORE 1 // if you link MailCore.framework

additionally some parts of CoreLib require setting the SANDBOX #define to indicate whether your app is sandbox

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