1. Hello.
Thursday, October 20, 11

2. Thank you
Thursday, October 20, 11

3. So you wanna build
iPhone & iPad apps?
Thursday, October 20, 11

4. Thursday, October 20, 11

5. iOS,
Cocoa,
Cocoa Touch,
Objective-C,
huh?
Thursday, October 20, 11

6. iOS
Thursday, October 20, 11

7. Cocoa
- The framework that powers
Mac OS X desktop apps
Thursday, October 20, 11

8. Cocoa Touch
- The framework that powers iOS apps
- A feature-set to support the mobile OS
Thursday, October 20, 11

9. Objective-C
- The programming language
powering the Apple frameworks.
- It's a superset of C, so it’s easy to mix
C and C++ into Cocoa applications.
Thursday, October 20, 11

10. Thursday, October 20, 11

11. Hello, Objective-C!
Thursday, October 20, 11

12. It’s object-oriented (OO)
... and it’s super-good at it.
Thursday, October 20, 11

13. Direct association
Indirect association
It loves the MVC design pattern
Controller
Model View
Thursday, October 20, 11

14. Objective-C vs ...
Thursday, October 20, 11

15. JavaScript
var firstName = “Ben”;
PHP
$firstName = “Ben”;
Objective-C
NSString *firstName = @“Ben”;
Thursday, October 20, 11

16. JavaScript
function numberOfCars (ownerID, carColor)
{
...
return totalCars;
}
PHP
public function numberOfCars ($ownerID, $carColor)
{
...
return $totalCars;
}
Objective-C
- (NSInteger *)numberOfCarsOwnedByUser:(NSInteger *)ownerID ofColor:(NSString *)carColor
{
...
return totalCars;
}
Thursday, October 20, 11

17. JavaScript
numberOfCars(75, “Orange”);
PHP
$this->numberOfCars(75, “Orange”);
Objective-C
[self numberOfCarsOwnedByUser:75 ofColor:@”Orange”];
Thursday, October 20, 11

18. JavaScript
console.log(“The value of x is: ” + x);
PHP
echo “The value of x is: ”.$x;
Objective-C
NSLog(@”The value of x is %d”, x);
Thursday, October 20, 11

19. JavaScript
var car = new Car();
PHP
$car = new Car();
Objective-C
Car *car = [[Car alloc] init];
Thursday, October 20, 11

20. Memory Management
Thursday, October 20, 11

21. Retain count
Car *car = [[Car alloc] init]; +1
[car release]; 0
[car release];
SH!
-1
CRA
*new to iOS5 - ARC!
Thursday, October 20, 11

22. pause
Thursday, October 20, 11

23. New Project
Thursday, October 20, 11

24. Cheers again
chris@skillshare.com
@chrisboardman
Thursday, October 20, 11