OBJECTIVE C
- Introduction to Objective-c programming
- Primitive Data Types and Operators
- Flow Control Statements
- Arrays and Structures
- Classes, Objects, and Messaging
- Memory Management and Properties
- Inheritance, Polymorphism
- Protocols and Categories
- Introduction to Foundation Framework Classes
- File Handling
- Property Lists, NSCopy, and Archiving
- Selectors and Targets
- Dynamic Typing and Dynamic Binding
Arrays and Structures
Arrays
In Single Variabule we can hold many diff values
They are two types of Array
1}ImmutabuleArray(NSArray)
2)MutableArray(NSMutabuleArray)
code for Array:
//
// ViewController.m
// ArrayDemo
//
// Created by apple on 16/02/13.
// Copyright (c) 2013 apple. All rights reserved.
//
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];// Do any additional setup after loading the view, typically from a nib.
double name[2];
//name[0],name[1],name[2]
name[1]=200.00;
name[0]=100.00;
double MyVal=300.00;
//NSLog(@"name[0])------>%.2f",name[0]);
// NSLog(@"name[1])------->%.2f",name[1]);
//NSLog(@"myValue)------->%.2f",MyVal);
double MyVal1=300.00;
double names[2]={100.0,200.0,MyVal1};
NSLog(@"names[0])------>%.2f",names[0]);
NSLog(@"names[1])------->%.2f",names[1]);
NSLog(@"names[2])------>%.2f",names[2]);
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.
}
@end
1)NSArray:
It is a static Array
if we create obj once we cant remove obj
occupies less memory
add obj during initialigation
code for NSArray:
//
// main.m
// NSAraayDemo
//
// Created by apple on 16/02/13.
// Copyright (c) 2013 apple. All rights reserved.
//
#import <Foundation/Foundation.h>
int main(int argc, const char * argv[])
{
@autoreleasepool {
// insert code here...
NSLog(@"Hello, World!");
/* NSArray *names=[[NSArray alloc]initWithObjects:@"naveen",@"Raja",@"Sandeep",nil];
NSLog(@"%@",[names objectAtIndex:1]);
for(int i=0;i<[names count];i++)
{
NSLog(@"%@",[names objectAtIndex:i]);
}*/
NSArray *Details = [NSArray arrayWithObjects: [NSDictionary dictionaryWithObjectsAndKeys: @"Naveen", @"name",[NSNumber numberWithInt: 21], @"age",[NSNumber numberWithInt: 23], @"num",nil],
[NSDictionary dictionaryWithObjectsAndKeys:@"Raja", @"name",[NSNumber numberWithInt:23], @"age",[NSNumber numberWithInt: 2], @"num",nil],
[NSDictionary dictionaryWithObjectsAndKeys:@"Sandeep", @"name",[NSNumber numberWithInt: 20], @"age",[NSNumber numberWithInt: 3], @"num",nil], nil];
// NSLog(@"%@",[Details objectAtIndex:1]);
for(int i=0;i<[Details count];i++){
NSLog(@"%@",[Details objectAtIndex:i]);
}
}
return 0;
}
2)NSMutabuleArray:
It is an Dynamic Array(Mutabule)
it changes the values inside existing Array Obj
occupies more mem
Mehods:
addObjectinsertObjectreplaceObjectAtIndexremoveObjectAtIndexremoveLastIndexremoveAllObjects
Code For NSMutabuleArray:
//
// main.m
// MutabuleArrayDemo
//
// Created by apple on 17/02/13.
// Copyright (c) 2013 apple. All rights reserved.
//
#import <Foundation/Foundation.h>
int main(int argc, const char * argv[])
{
@autoreleasepool {
// insert code here...
NSLog(@"Hello, World!");
//NSMutsbule array Declaration1
NSMutableArray *names=[[NSMutableArray alloc]init];
//adding names to an array
[names addObject:@"Naveen"];
[names addObject:@"Sandeep"];
[names addObject:@"Raju"];
for(NSString *name in names)
{
NSLog([NSString stringWithFormat:@"names--->%@",name]); }
//NSMutsbule array Declaration2
NSMutableArray *names1=[[NSMutableArray alloc]initWithCapacity:23]; [names1 addObject:@"Hyderabad"];
[names1 addObject:@"Bangalore"];
[names1 addObject:@"Channai"];
//replacing at index 1
[names1 replaceObjectAtIndex:1 withObject:@"Delhi"]; //Removing Index
[names1 removeObjectAtIndex:1];//Delhi removed
//removing Last Index
[names1 removeLastObject];//Chennai Removed
//After Removing again Adding
[names1 addObject:@"Bangalore"];
[names1 addObject:@"Channai"];
//remove All
[names1 removeAllObjects];
for(NSString *State in names1)
{
NSLog([NSString stringWithFormat:@"States----->%@",State]);}
}
return 0;
}
Structures:
It is a user defined Data Type we can store diff data under unique name
typedef is to create a new type name for builtin type
//
// main.m
// StrctureDemo
//
// Created by apple on 17/02/13.
// Copyright (c) 2013 apple. All rights reserved.
//
#import <Foundation/Foundation.h>
typedef struct
{
float Sal;
double AnualSal;
char *name;
}Details;
int main(int argc, const char * argv[])
{
@autoreleasepool {
// insert code here...
NSLog(@"Hello, World!");
Details det,det2,det3;
//for Details 1
det.Sal=25000;
det.AnualSal=3.6;
det.name="Naveen";
NSLog(@"Employee Name is %s",det.name);
NSLog(@"Sal is %.2f",det.Sal);
NSLog(@"Anual Sal IS %.2f",det.AnualSal);
//Details 2
det2.Sal=15000;
det2.AnualSal=2.1;
det2.name="Sandeep";
NSLog(@"Employee Name2 is %s",det2.name);
NSLog(@"Sal2 is %.2f",det2.Sal);
NSLog(@"Anual Sal2 IS %.2f",det2.AnualSal);
//Details 3
det3=det;
NSLog(@"name3--->%s",det3.name);
NSLog(@"Sal3---> %.2f",det3.Sal);
NSLog(@"Anual Sal3 -->%.2f",det3.AnualSal);
}
return 0;
}
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