![Object Message passing :
Obj-C
[world say:@"hello"];
Ruby
world.say("hello")](https://image.slidesharecdn.com/my-adventures-in-objc-111115051447-phpapp01/85/My-Adventures-In-Objective-C-A-Rubyists-Perspective-19-320.jpg)
![Object Message passing :
Obj-C
[world say:@"hello"];
[world performSelector:@selector(say:) withObject:@"hello"]
objc_sendMsg(id object, SEL selector)](https://image.slidesharecdn.com/my-adventures-in-objc-111115051447-phpapp01/85/My-Adventures-In-Objective-C-A-Rubyists-Perspective-20-320.jpg)
![Non-strict typing (Duck Typing?)
Obj-C
id world = [[World alloc] init];
[world peace];
Here 'id' is a pointer to any object.](https://image.slidesharecdn.com/my-adventures-in-objc-111115051447-phpapp01/85/My-Adventures-In-Objective-C-A-Rubyists-Perspective-22-320.jpg)
![Non-strict typing (Duck Typing?)
Obj-C
World *world = [[World alloc] init];
[world peace];
This ensures method compiler checks!](https://image.slidesharecdn.com/my-adventures-in-objc-111115051447-phpapp01/85/My-Adventures-In-Objective-C-A-Rubyists-Perspective-23-320.jpg)
![Object declaration
Obj-C
MyClass * myObject = [[MyClass alloc] init];
Ruby (pseudo code)
class Object
def self.new(*args)
self.alloc.initialize(*args)
end
end](https://image.slidesharecdn.com/my-adventures-in-objc-111115051447-phpapp01/85/My-Adventures-In-Objective-C-A-Rubyists-Perspective-24-320.jpg)
![Interface/Implementation (the C thing)
world.m (implementation file)
#import "world.h"
@implementation World
@synthesize foo;
-(NSString *) say:(NSString *)something{}
- (void)dealloc {
[foo release];
[super dealloc];
}
@end](https://image.slidesharecdn.com/my-adventures-in-objc-111115051447-phpapp01/85/My-Adventures-In-Objective-C-A-Rubyists-Perspective-26-320.jpg)
![Properties aka attr_accessor
@synthesize: creates dynamic setters and getters and
performs the necessary memory allocation.
-(void)setFoo:(Foo *)s {
if(foo != s) {
[foo release];
foo = [s retain];
}
}
-(Foo *)foo { return foo; }](https://image.slidesharecdn.com/my-adventures-in-objc-111115051447-phpapp01/85/My-Adventures-In-Objective-C-A-Rubyists-Perspective-28-320.jpg)
![We Have Blocks!
NSArray *films = [NSArray arrayWithObjects:@"Reservoir
Dogs", @"Pulp Fiction", @"Kill Bill", nil];
[films enumerateObjectsUsingBlock:^(id object, NSUInteger
index, BOOL *stop) {
NSLog(@"%@ film at index %d", object, index);
}];](https://image.slidesharecdn.com/my-adventures-in-objc-111115051447-phpapp01/85/My-Adventures-In-Objective-C-A-Rubyists-Perspective-31-320.jpg)
My Adventures In Objective-C (A Rubyists Perspective)
- 1. MY ADVENTURES IN OBJECTIVE-C @abdels / @thesupertimes
- 3. Its just as crappy as Java!
- 4. I’m waiting for MacRuby!
- 5. OH NO!!
- 6. still no iOS support, Boll@@ks!
- 8. Solutions
- 9. PhoneGap
- 11. But really, why all the hating?
- 12. That’s pride f**king with you. F**k pride. Pride only hurts. It never helps. You fight through that sh*t!
- 14. So, here's what I Learnt,
- 15. SMALL TALK GUY (ALAN KAY)
- 16. Objective-C, is reflective, OO, Smalltalk-ish!
- 17. Sound a lot like Ruby
- 18. Unlike Ruby, Objective-C is a strict superset of C
- 19. Object Message passing : Obj-C [world say:@"hello"]; Ruby world.say("hello")
- 20. Object Message passing : Obj-C [world say:@"hello"]; [world performSelector:@selector(say:) withObject:@"hello"] objc_sendMsg(id object, SEL selector)
- 21. Object Message passing : Ruby world.send(:say, "hello")
- 22. Non-strict typing (Duck Typing?) Obj-C id world = [[World alloc] init]; [world peace]; Here 'id' is a pointer to any object.
- 23. Non-strict typing (Duck Typing?) Obj-C World *world = [[World alloc] init]; [world peace]; This ensures method compiler checks!
- 24. Object declaration Obj-C MyClass * myObject = [[MyClass alloc] init]; Ruby (pseudo code) class Object def self.new(*args) self.alloc.initialize(*args) end end
- 25. Interface/Implementation (the C thing) world.h (header file) #import <UIKit/UIKit.h> @interface World : NSObject { NSString *foo; } @property (copy, retain) NSString *foo; -(NSString *) say:(NSString *)something; @end
- 26. Interface/Implementation (the C thing) world.m (implementation file) #import "world.h" @implementation World @synthesize foo; -(NSString *) say:(NSString *)something{} - (void)dealloc { [foo release]; [super dealloc]; } @end
- 27. Properties aka attr_accessor @interface World : NSObject { NSString *foo; ... @property (copy, retain) NSString *foo; ... @end @implementation World @synthesize foo; ... @end
- 28. Properties aka attr_accessor @synthesize: creates dynamic setters and getters and performs the necessary memory allocation. -(void)setFoo:(Foo *)s { if(foo != s) { [foo release]; foo = [s retain]; } } -(Foo *)foo { return foo; }
- 29. Interfaces with Protocols @protocol Shopper - (void)recession; - (void)boom; @end @interface World : NSObject <Shopper> @end
- 30. Monkey Patching with Categories UIImage+RoundedCorner.h @interface UIImage (RoundedCorner) - (UIImage *)roundedCornerImage; @end UIImage+RoundedCorner.m @implementation UIImage (RoundedCorner) - (UIImage *)roundedCornerImage { //Make rounded corners } @end
- 31. We Have Blocks! NSArray *films = [NSArray arrayWithObjects:@"Reservoir Dogs", @"Pulp Fiction", @"Kill Bill", nil]; [films enumerateObjectsUsingBlock:^(id object, NSUInteger index, BOOL *stop) { NSLog(@"%@ film at index %d", object, index); }];
- 32. We Have Blocks! int (^negative)(int) = ^(int number) { return number * -1; }; int result = negative(2);
- 33. Basics over
- 34. You panicked, but don’t
- 35. iOS is a powerful platform that controls phones
- 36. Your brain & eyes hurting is a small price to pay for the privelage :P
- 37. REFERENCES HTTP://EN.WIKIPEDIA.ORG/WIKI/OBJECTIVE-C HTTP://EN.WIKIPEDIA.ORG/WIKI/MACRUBY HTTP://OFPS.OREILLY.COM/TITLES/9781449380373/INDEX.HTML HTTP://BLOG.PHUSION.NL/2010/03/24/OBJECTIVE-C-FOR-RUBY-DEVELOPERS- UN-NOT-SO-PETIT-INTERLUDE-1/ HTTP://GOSHAKKK.NAME/BLOG/2011/08/19/OBJECTIVE-C-RUBYISTS-INSIGHT/ HTTP://GOOGLE-STYLEGUIDE.GOOGLECODE.COM/SVN/TRUNK/ OBJCGUIDE.XML