The document provides tutorials on various concepts in Objective-C and iOS application development including classes and objects, inheritance, encapsulation, properties, methods, conditionals, loops, and more. The tutorials include code examples to demonstrate each concept.

1. Tutorial - 1
Mobile application development platforms,
Android, Windows, iOS, Bada, Blackberry etc.
Android, iOS, and Windows application
development is high on demand and will remain
for coming few years.
Android/iOS and Windows application
development is also possible using non standard
tools.
Android: eclipse + android sdk or Android
Studio or Epselorator Studio (HTML5 + CSS3)
or Phone Gap or TheAppBuilder.com etc.
iOS: Xcode + MAC, Adobe, Appselorator
Studio (HTML5 + CSS3) or Phone Gap or The
App Builder etc.
Blackberry: Eclipse + Blackberry SDK
Windows: .NET
Tutorial – 2
#import <Foundation/Foundation.h>

2. int main (int argc, const char *argv[])
{
@NSAutoreleasepool
{
NSLog(@"Hello world");
[pool drain];
return 0;
}
}
Tutorial – 3
#import <Foundation/Foundation.h>
int main (int argc, const char *argv[])
{
@NSAutoreleasepool

3. {
int n1=20;
int n2=40;
int sum=n1+n2;
NSLog(@"The sum of %i and %i
is %i",n1,n2,sum);
[pool drain];
return 0;
}
}
Tutorial – 4
@interface Person:NSObject
{
int age;
int weight;
}
-(void) print;
-(void) setAge : (int) a;
-(void) setWeight : (int) w;

4. @end
@implementation Person
-(void) print
{
NSLog (@"I am %i years old and weigh %i
pounds", age,weight);
}
-(void) setAge : (int) a
{
age=a;
}
-(void) setWeight : (int) w
{
weight=w;
}
@end
int main (int argc, const char argv[])
{
@NSAutoreleasepool
{

5. Person *ankit;
ankit=[Person alloc];
ankit=[Person init];
[ankit setAge:20];
[ankit setWeight:100];
[ankit print];
return 0;
}
}
Replacement in previous tutorial
Tutorial: 5
Person *name= [[Person alloc]init];
Person *sandy=[[Person alloc]init];
[sandy setAge: 21];
[sandy setWeight:450];
[sandy print];
[sandy release];
[pool drain];
return 0;

6. Tutorial – 6
Encapsulation
@interface Person:NSObject
{
int age,
int weight,
}
-(void) print;
-(void) setAge : (int) a;
-(void) setWeight : (int) w;
-(int) age;
-(int) weight;
@end
@implementation Person
-(void) print
{
NSLog (@"I am %i years old and weigh %i
pounds", age,weight);
}

7. -(int) setAge : (int) a
{
age=a;
}
-(int) setWeight : (int) w
{
weight=w;
}
-(int) age
{
return age;
}
-(int) weight
{
return weight;
}
@end
int main(int argc, const char * argv[])
{

8. @NSAutoreleaspool
{
Person *name= [[Person alloc]init];
[name setAge:25];
[name setWeight: 200];
NSLog(@"Name is %i and weighs %i",
[name age],[name
weight]);
[name release];
[pool drain];
return 0;
}
}
Tutorial – 7
Data Types
#import <Foundation/Foundation.h>
int main (int argc, const char *argv[])
{

9. @NSAutoreleasepool
{
int i=20;
float f=31.37;
double d= 9/32;
char c = ‘a’;
NSLog (@"%i",i);
NSLog (@"%f",f);
NSLog (@"%e",d);
NSLog (@"%c",c);
[pool drain];
return 0;
}
}
Tutorial – 8
TypeCasting
#import <Foundation/Foundation.h>
int main (int argc, const char *argv[])
{
@NSAutoreleasepool
{

10. int i1, i2=15, i3=10;
float f1=20.86, f2;
i1=f1;
NSLog (@"%i",i1);
f2=i2/i3;
NSLog (@"%f",f2);
f2=f1/i3;
NSLog (@"%f",f2);
[pool drain];
return 0;
}
}

11. Tutorial – 9
Type Casting (Explicite)
#import <Foundation/Foundation.h>
int main (int argc, const char *argv[])
{
@NSAutoreleasepool
{
int i1, i2=15, i3=10;
float f1=20.86, f2;
f2=(float)i3/8;
NSLog (@"%f",f2);
int name = (int)22.77;
NSLog (@"%i",name);
name = name + 5; // name += 5;
NSLog(@"%i", name);
(Shorthand)
name+=5;
NSLog(@"%i", name);

12. [pool drain];
return 0;
}
}
LOOPS
Tutorial – 10
For Loop:-
#import <Foundation/Foundation.h>
int main (int argc, const char *argv[])
{
@NSAutoreleasepool
{
for(int i=1;i<=10;i++)
NSLog(@"%i", i);
[pool drain];
return 0;
}
}
Tutorial – 11
#import <Foundation/Foundation.h>

13. int main (int argc, const char *argv[])
{
@NSAutoreleasepool
{
int i, usernumber;
NSLog (@"Enter the number and I will print
it");
scanf("%i",& usernumber);
for(int i=1; i<= usernumber ; i++)
NSLog(@"%i",i);
[pool drain];
return 0;
}
}

14. Tutorial – 12
Nested For Loop:-
#import <Foundation/Foundation.h>
int main (int argc, const char *argv[])
{
@NSAutoreleasepool
{
int usernumber;
for(int a=1; a<=3;a++)
{
NSLog(@"Enter a number");
scanf(“%i",&usernumber);
for(int b=1; b<= usernumber; b++)
NSLog(@"%i",usernumber);
}
[pool drain];
return 0;
}
}

15. Tutorial – 13
While Loop:-
#import <Foundation/Foundation.h>
int main (int argc, const char *argv[])
{
@NSAutoreleasepool
{
int num=1 ;
while (num<=6)
{
NSLog(@"%i",num);
num++;
}
[pool drain];
return 0;
}
}

16. Tutorial – 14
#import <Foundation/Foundation.h>
int main (int argc, const char *argv[])
{
@NSAutoreleasepool
{
int num=1 ;
int name;
scanf(“%i",&name);
while (num<=10)
{
NSLog(@"%i time %i= %i", num, name,
num*name);
num++;
}
[pool drain];
return 0;
}
}
Tutorial – 15

17. Do-While Loop:-
#import <Foundation/Foundation.h>
int main (int argc, const char *argv[])
{
@NSAutoreleasepool
{
int n=1 ;
do
{
NSLog(@"%i",n);
n++;
}
while (n<=5);
[pool drain];
return 0;
}
}

18. Tutorial – 16
#import <Foundation/Foundation.h>
int main (int argc, const char *argv[])
{
@NSAutoreleasepool
{
int n=1 ;
do
{
NSLog(@"%i squared is %i",n,n*n);
n++;
}
while (n<=10);
[pool drain];
return 0;
}
}

19. Tutorial – 17
#import <Foundation/Foundation.h>
int main (int argc, const char *argv[])
{
@NSAutoreleasepool
{
int n,r ;
NSLog(@"Enter a number");
scanf(“%i",&n);
r=n%2;
if(r==0)
NSLog(@"Your number is even");
else
NSLog(@"Your number is odd");
[pool drain];
return 0;
}
}
Tutorial – 18
Relational test and nested if

20. #import <Foundation/Foundation.h>
int main (int argc, const char *argv[])
{
@NSAutoreleasepool
{
int age,sex;
NSLog(@"Enter age");
scanf(“%i",&age);
NSLog(@"Enter sex (1:Boy 2:Girl)");
scanf(“%i",&sex);
if (age<18 || age >80)
NSLog(@"Go to another website");
else
{
if(sex==1)
NSLog(@"Welcome Man!!");
else
NSLog(@"Welcome Girl!!");
}
[pool drain];
return 0;
}

21. }
Tutorial – 19
Else if ladder
#import <Foundation/Foundation.h>
int main (int argc, const char *argv[])
{
@NSAutoreleasepool
{
int time;
NSLog(@"Enter the time");
scanf(“%i",&time);
if(time<11)
NSLog(@"Gud Morning!!");
else if(time<16)
NSLog(@"Gud Afternoon!!");
else if(time<24)
NSLog(@"Gud Night!!");
else
NSLog(@"What did u enter????");
[pool drain];

22. return 0;
}
}
Tutorial – 20
Switch
#import <Foundation/Foundation.h>
int main (int argc, const char *argv[])
{
@NSAutoreleasepool
{
int age=2;
switch(age)
{
case 1:
NSLog(@"They are cute");
break;
case 2:
NSLog(@"They are terrible");
break;
case 3:

23. NSLog(@"They are thirsty");
break;
case 4:
NSLog(@"They are 4");
break;
default:
NSLog(@"Enter valid number");
}
}
[pool drain];
return 0;
}
Tutorial – 21
Conditional Operator
#import <Foundation/Foundation.h>
int main (int argc, const char *argv[])
{
@NSAutoreleasepool
{
int a=2,b=3,c=0;

24. a==b ? NSLog(@"They are equal") :
NSLog(@"They are different");
c ? NSLog(@"True") : NSLog
(@"False");
}
[pool drain];
return 0;
}
Tutorial – 22
MVC Architecture
Person.h
@interface Person:NSObject
{
int age,weight;
}
-(void) print;
-(void) setAge : (int) a;
-(void) setWeight : (int) w;//void setWeight(int
w);
@end

25. Person.m
#import “Person.h"
@implementation Person
-(void) print
{
NSLog (@"I am %i years old and weigh %i
pounds", age,weight);
}
-(void) setAge : (int) a
{
age=a;
}
-(void) setWeight : (int) w
{
weight=w;
}
@end
Main.m
#import<Foundation/Foundation.h>
#import “Person.h"

26. int main (int argc, const char argv[])
{
@NSAutoreleasepool
{
Person *name=[[Person alloc]init];
//Person ob = new Person();
[name setAge:20];
[name setWeight:100];
[name print];
[name release];
[pool drain];
return 0;
}
}
Tutorial – 23
Automatic Setter& Getter
Person.h
@interface Person:NSObject
{
int age,weight;
}
@property int age,weight;

27. -(void) print;
@end
Person.m
#import "Person.h"
@implementation Person
@synthesis age,weight;
-(void) print
{
NSLog(@"I am %iyears old and weigh %i
pounds", age, weight);
}
@end
Main.m
#import<Foundation/Foundation.h>
#import “Person.h"
int main (int argc, const char argv[])
{
@NSAutoreleasepool
{

28. Person *name=[[Person alloc]init];
name.age = 20;
name.weight = 100;
[name print];
[name release];
[pool drain];
return 0;
}
}
Tutorial – 24
Multiple Arguments
Person.h
@interface Person:NSObject
{
int age,weight;
}
@property int age,weight;
@end
-(void) print;
-(void) dateAge : (int) a : (int) i;

29. Person.m
#import"Person.h"
-(void) print
{
NSLog(@"I am %iyears old and weigh %i
pounds", age, weight);
}
-(void) dateAge : (int) a : (int) i
{
NSLog(@"You can date %i years old", (a/2+7)-
(i/10000));
}
Main.m
#import <Foundation/Foundation.h>
#import "Person.h"
int main (int argc, const char argv[])
{
@NSAutoreleasepool
{
Person *name=[[Person alloc]init];

30. name.age = 12;
name.weight = 120;
[name print];
[name dateAge : 30:300000];
[name release];
[pool drain];
return 0;
}
}
Tutorial – 25
Inheritance
Main.m
#import <Foundation/Foundation.h>
@interface Lesley: NSObject
{
int a;
}
-(void) meth;
@end
@implementation Lesley

31. -(void) meth
{
a=50;
}
@end
@interface Son: Lesley
-(void) printThing;
@end
@implementation Son
-(void) printThing
{
NSLog(@"%i",a);
}
@end
int main (int argc, const char argv[])
{
@NSAotoreleasepool
{
son *s=[[son alloc]init];
[s meth];
[s printThing];

32. [s release];
[pool drain];
return 0;
}
}
Tutorial – 26
Rectangle.h
@interface Rectangle:NSObject
{
int width, height;
}
@property int width,height;
-(int) area;
-(int) parameter;
-(void) setWH : (int) w : (int) h;
@end
Rectangle.m
#import “Rectangle.h"
@implementation Rectangle
@synthesize width,height;
-(void) setWH : (int)w : (int)h

33. {
width=w;
height=h;
}
-(int) area
{
return width*height;
}
-(int) parameter
{
return (width+height)*2;
}
@end
Main.m
#import <Foundation/Foundation.h>
#import "Rectangle.h"
int main (int argc, const char argv[])
{
@NSAutoreleasepool
{
Rectangle *r=[[Rectangle alloc]init];

34. [r setWH:6:8];
NSLog(@"Rectangle is %i
by %i",r.width,r.height);
NSLog(@"Area is %i, Parameter is %i",[r
area],[r parameter]);
[r release];
return 0;
}
}
Tutorial – 27
Square.h
#import “Rectangle.h"
@interface Square:Rectangle
-(void) setSide: (int)s;
-(int) side;
@end
Square.m
#import “square.h"

35. @implementation Square: Rectangle
-(void) setSide : (int)s
{
[self setWH :s:s];
}
-(int) side
{
return width;
}
@end
Main.m
#import <Foundation/Foundation.h>
#import “Square.h"
int main (int argc, const char argv[])
{
@NSAutoreleasepool
{
Square *s= [[Square alloc]init];
[s setSide:6];
NSLog(@"One side is %i", [s side]);
NSLog(@"Area is %i and perameter
is %i",[s area],[s parameter]);

36. [s release];
[pool drain];
return 0;
}
}
Tutorial – 28
Mom.h
@interface Mom:NSObject
{
int num1;
}
-(void) setNum1;
@end
Mom.m
#import “Mom.h"
@implementation Mom
-(void) setNum1
{
num1=70;
}

37. @end
Son.h
#import “Mom.h"
@interface Son:Mom
-(void) setNum1;
-(void)printNumber;
@end
Son.m
#import “Son.h"
@implementation Son
-(void)setNum1
{
num1= 14;
}
-(void)printNumber
{
NSLog(@"The number is %i",num1);
}
@end

38. Main.m
#import<Foundation/Foundation.h>
#import “Son.h"
int main (int argc, const char argv[])
{
@NSAutoreleasepool
{
Son *s=[[Son alloc]init];
[s setNum];
[s printNumber];
[s release];
[pool drain];
return 0;
}
}
Tutorial – 29
numz.h
@interface numz:NSObject

39. {
int num1,num2,ans;
}
-(void) setNumbers : (int) a : (int) b;
-(void) add;
-(void) print;
Numz.m
@implementation Numz
-(void) setNumbers: (int) a: (int) b
{
num1 = a;
num2= b;
}
-(void) add
{
ans=num1+num2;
}
-(void) print
{
NSLog(@"I am from numz class, %i",ans);
}
@end

40. charz.h
@interface charz:NSObject
{
char c1;
char c2;
}
-(void) setCharz;
-(void)add;
-(void)print;
@end
charz.m
@implementation charz
-(void) setCharz
{
c1=’B’;
c2=’W’;
}
-(void) add
{
NSLog(@"%c %c",c1,c2);
}
-(void)print

41. {
NSLog(@"I am from the chaz class");
}
Main.m
#import<Foundation/Foundation.h>
#import “numz.h"
#import “charz.h"
int main (int argc, const char argv[])
{
@NSAutoreleasepool
{
numz *n =[[numz alloc]init];
charz *c =[[charz alloc]init];
[n setNumbers :8:10];
[n add];
[n print];
[c setCharz];
[c add];
[c print];
[n release];

42. [c release];
[pool drain];
return 0;
}
}
Tutorial – 30
numz.h
@interface numz:NSObject
{
int num1,num2,ans;
}
-(void) setNumbers : (int) a : (int) b;
-(void) add;
-(void) print;
Numz.m
@implementation Numz
-(void) setNumbers: (int) a: (int) b
{
num1 = a;

43. num2= b;
}
-(void) add
{
ans=num1+num2;
}
-(void) print
{
NSLog(@"I am grom numz class, %i",ans);
}
@end
charz.h
@interface charz:NSObject
{
char c1;
char c2;
}
-(void) setCharz;
-(void)add;
-(void)print;
@end

44. charz.m
@implementation charz
-(void) setCharz
{
c1=’B’;
c2=’W’;
}
-(void) add
{
NSLog(@"%c %c",c1,c2);
}
-(void)print
{
NSLog(@"I am from the chaz class");
}
Main.m
#import<Foundation/Foundation.h>
#import “numz.h"
#import “charz.h"
int main (int argc, const char argv[])
{

45. @NSAutoreleasepool
{
numz *n =[[numz alloc]init];
charz *c =[[charz alloc]init];
[n setNumbers :8:10];
[n add];
[n print];
[c setCharz];
[c add];
[c print];
[n release];
[c release];
[pool drain];
return 0;
}
}
Tutorial – 31
numz.h
@interface numz:NSObject

46. {
int num1,num2,ans;
}
-(void) setNumbers : (int) a : (int) b;
-(void) add;
-(void) print;
Numz.m
@implementation Numz
-(void) setNumbers: (int) a: (int) b
{
num1 = a;
num2= b;
}
-(void) add
{
ans=num1+num2;
}
-(void) print
{
NSLog(@"I am grom numz class, %i",ans);
}
@end

47. charz.h
@interface chaez:NSObject
{
char c1;
char c2;
}
-(void) setCharz;
-(void)add;
-(void)print;
@end
charz.m
@implementation charz
-(void) setCharz
{
c1=’B’;
c2=’W’;
}
-(void) add

48. {
NSLog(@"%c %c",c1,c2);
}
-(void)print
{
NSLog(@"I am from the chaz class");
}
Main.m
#import<Foundation/Foundation.h>
#import “numz.h"
#import “charz.h"
int main (int argc, const char argv[])
{
@NSAutoreleasepool
{
id tuna;
numz *n =[[numz alloc]init];
charz *c=[[charz alloc]init];
tuna=n;

49. [tuna print];
tuna=c;
[tuna print];
[pool drain];
return 0;
}
}
Tutorial – 32
Exception Handling
numz.h
@interface numz:NSObject
{
int num1,num2,ans;
}
-(void) setNumbers : (int) a : (int) b;
-(void) add;
-(void) print;
Numz.m
@implementation Numz
-(void) setNumbers: (int) a: (int) b
{

50. num1 = a;
num2= b;
}
-(void) add
{
ans=num1+num2;
}
-(void) print
{
NSLog(@"I am grom numz class, %i",ans);
}
@end
Main.m
#import<Foundation/Foundation.h>
#import “numz.h"
int main (int argc, const char argv[])
{
@NSAutoreleasepool
{
numz *n =[[numz alloc]init];
@try

51. {
[n this_is_gonna_get_error];
}
@ catch (NSException *e)
{
NSLog(@"you got an error in your
program");
}
NSLog(@"this is the code after error");
[pool drain];
return 0;
}
}
Tutorial – 33
Extern keyword
tuna.h
@interface tuna:NSObject
-(void) changeVar;
tuna.m
@implementation tuna
-(void) changeVar

52. {
extern int gdrunk;
gdrunk=13;
}
Main.m
#import<Foundation/Foundation.h>
#import “tuna.h"
int gdrunk=21; //Global Variable
int main (int argc, const char argv[])
{
@NSAutoreleasepool
{
tuna *f =[[tuna alloc]init];
[f changeVar];
NSLog(@"%i",gdrunk);
[f release];
[pool drain];
return 0;
}
}

53. Tutorial – 34
Enumerated Data Type
main.m
#import<Foundation/Foundation.h>
int main (int argc, const char argv[])
{
@NSAutoreleasepool
{
enum day {m,t,w,th,f};
enum day entry;
NSLog(@"Enter the number for getting the
day");
scanf(“%i",&entry);
switch(entry)
{
case m:
NSLog(@"Monday");
break;
case t:
NSLog(@"Tuesday");
break;

54. case w:
NSLog(@"Wednesday");
break;
case th:
NSLog(@"Thursday");
break;
case f:
NSLog(@"Friday");
break;
default:
NSLog(@"Enter the number within the
range");
break;
}
}
}
Tutorial – 35
Define Statement
crap.m
#define BACON 23

55. #define TOAST 44
main.m
#import <Foundation/Foundation.h>
#import “crap.h"
int main(int argc, const char *argv[])
{
@NSAutoreleasepool
{
int x= TOAST + BACON;
NSLog(@"%i",x);
[pool drain];
}
}
Tutorial – 36
Frameworks
NSNumber
main.m
#import <Foundation/Foundation.h>
int main(int argc, const char * argv[])
{
@autoreleasepool

56. {
NSNumber *buckyint,*buckyfloat;
buckyint=[NSNumber numberWithInteger:100];
buckyfloat=[NSNumber numberWithFloat:100.123];
int x=[buckyint intValue];
float y=[buckyfloat floatValue];
NSLog(@"%i and %f",x,y);
if ([buckyint isEqualToNumber:buckyfloat]==YES)
NSLog(@"They are equal");
else
NSLog(@"They are not equal");
if ([buckyint
compare :buckyfloat]==NSOrderedAscending)
NSLog(@"First number is less");
else
NSLog(@"Second Number is less");
return 0;
}
}
Tutorial – 37
String Objects
main.m
#import <Foundation/Foundation.h>
int main(int argc, const char * argv[])

57. {
@autoreleasepool
{
NSString *s=@"dont do this";
NSString *tester;
printf("%@",s);
NSLog(@"Length is %i",[s length]);
tester=[NSString stringWithString:s];
NSLog(@"Copied string is %@",tester);
tester=[s uppercaseString];
NSLog(@"%@", tester);
}
return 0;
}
Tutorial – 38
Substring
main.m
#import <Foundation/Foundation.h>
int main(int argc, const char * argv[])
{
@autoreleasepool

58. {
NSString *s = @"Cats dont like bananas";
NSString *d = @"Don’t feed grapes to dogs";
NSString *tester;
tester = [d substringToIndex:10];
NSLog(@"First 10 characters are %@",tester);
tester = [d substringFromIndex:10];
NSLog(@"From 10 till the end %@",tester);
//tester = [d substringWithRange (5,11)];
//NSLog(@" %@",tester);
NSRange range = [d rangeOfString:@"grapes"];
NSLog(@"Location is %i and length is %i",
range.location,range.length);
}
return 0;
}
Tutorial – 39
Mutable String
main.m
#import <Foundation/Foundation.h>

59. int main(int argc, const char * argv[]) {
@autoreleasepool {
NSString *dog = @"Hot dog ";
NSMutableString *mute;
mute = [NSMutableString stringWithString:dog];
NSLog(@"%@",mute);
[mute insertString: @"sauce" atIndex:8];
NSLog(@"%@",mute);
[mute deleteCharactersInRange:
NSMakeRange(4,3)];
NSLog(@"%@",mute);
}
return 0;
}
Tutorial – 40
Mutable String
main.m
#import <Foundation/Foundation.h>
int main(int argc, const char * argv[]) {
@autoreleasepool {
NSString *dog = @"Hot dog? I thought you said
pumpkin";
NSMutableString *mute;
mute = [NSMutableString stringWithString:dog];

60. NSLog(@"%@",mute);
[mute setString: @"I am a new string!"];
NSLog(@"%@",mute);
[mute replaceCharactersInRange :
NSMakeRange(11,7) withString :@"mother!"];
NSLog(@"%@",mute);
NSString *old=@"mother";
NSString *new=@"baby seal";
NSRange therange = [mute rangeOfString:old];
[mute replaceCharactersInRange:therange
withString:new];
NSLog(@"%@",mute);
}
return 0;
}
Tutorial – 41
Array
main.m
#import <Foundation/Foundation.h>
int main(int argc, const char * argv[]) {
@autoreleasepool {

61. NSArray * food =[NSArray
arrayWithObjects:@"apple",@"orang",@"mango",@"bana
na", nil];
for(int i=0;i<4;i++)
{
NSLog(@"item at index %i is %@",i,[food
objectAtIndex:i]);
}
}
return 0;
}
Tutorial – 42
Mutable Array
main.m
#import <Foundation/Foundation.h>
int main(int argc, const char * argv[]) {
@autoreleasepool {
NSMutableArray *changeme = [NSMutableArray
arrayWithCapacity:25];
[changeme addObject: [NSNumber
numberWithInteger:2]];
for(int i=0;i<=100;i++)
{

62. [changeme addObject:[NSNumber
numberWithInteger:i]];
}
for(int x=0;x<[changeme count];x++)
{
NSLog(@"%d=%li",x,(long)[[changeme
objectAtIndex:x]integerValue]);
}
return 0;
}
}
Tutorial – 43
Dictionaries
main.m
#import <Foundation/Foundation.h>
int main(int argc, const char argv[])
{
@NSAutoreleasepool
{
NSMutableDictionary *mydic =
[NSMutableDictionary dictionary];
[mydic setObject:@"When you spray youself
with free breez" forKey:@"freebreez shower"];

63. [mydic setObject:@"gamer who lacks
experience" forKey:@"Noob"];
[mydic setObject:@"worst food on the planet"
forKey:@"sushi"];
NSLog(@"%@",[mydic
objectForKey:@"sushi"]);
}
}
Tutorial – 44
Files
main.m
#import <Foundation/Foundation.h>
int main(int argc, const char argv[])
{
@NSAutoreleasepool
{
NSString *testerfile = @"testerfile";
NSFileManager *manager;
manager=[NSFileManager defaultManager];
//Creates a default file manager
if([manager fileExistsAtPath : testerfile]==NO)
{

64. NSLog(@"File does not exists");
return 1;
}
// Copy of a file
if ([manager copyItemAtPath : testerfile
toPath:@"newfile" error : NULL]== NO)
{
NSLog(@"Cannot copy the file");
return 2;
}
//Rename the copy file
if ([manager moveItemAtPath:@"newfile"
toPath:@"newfile2" error:NULL]==NO)
{
NSLog(@"Cannot rename it");
return 3;
}