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Objective-C Reference

The main language used by Apple for the OS X and iOS operating systems before Swift. Essential syntax and code samples for professional development.

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Declaration

@interface Person : NSObject
@property NSString *name;
@end

Messaging

[object methodWithArg:val];

Strings

NSString *msg = @"Hello World";

Arrays

NSArray *list = @[@"A", @"B"];

Dicts

NSDictionary *map = @{@"id": @1};

Blocks

void (^printMsg)(void) = ^{
  NSLog(@"Hi");
};

Developer Utilities

PDF Toolkit

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