Fetching data from server using json in your iphone/ipad

Question

appdelegate.h

//

// UsingJSONAppDelegate.h

// UsingJSON

//

// Created by Wei-Meng Lee on 28/8/11.

//

#import <UIKit/UIKit.h>

@class UsingJSONViewController;

@interface UsingJSONAppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

@property (strong, nonatomic) UsingJSONViewController *viewController;

@property (strong,nonatomic)UINavigationController *nav;

@end

appdelegate.m

//

// UsingJSONAppDelegate.m

// UsingJSON

//

// Created by Wei-Meng Lee on 28/8/11.

//

#import "UsingJSONAppDelegate.h"

#import "UsingJSONViewController.h"

@implementation UsingJSONAppDelegate

@synthesize window = _window;

@synthesize viewController = _viewController;

@synthesize nav;

- (void)dealloc

{

[_window release];

[_viewController release];

[super dealloc];

}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];

// Override point for customization after application launch.

self.viewController = [[[UsingJSONViewController alloc] initWithNibName:@"UsingJSONViewController" bundle:nil] autorelease];

nav=[[UINavigationController alloc]initWithRootViewController:_viewController];

self.window.rootViewController = self.nav;

[self.window makeKeyAndVisible];

return YES;

}

- (void)applicationWillResignActive:(UIApplication *)application

{

/*

Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.

Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.

*/

}

- (void)applicationDidEnterBackground:(UIApplication *)application

{

/*

Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.

If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.

*/

}

- (void)applicationWillEnterForeground:(UIApplication *)application

{

/*

Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.

*/

}

- (void)applicationDidBecomeActive:(UIApplication *)application

{

/*

Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.

*/

}

- (void)applicationWillTerminate:(UIApplication *)application

{

/*

Called when the application is about to terminate.

Save data if appropriate.

See also applicationDidEnterBackground:.

*/

}

@end

vc.h

//

// UsingJSONViewController.h

// UsingJSON

//

// Created by Wei-Meng Lee on 28/8/11.

//

#import <UIKit/UIKit.h>

#import "SBJson.h"

#import "custom.h"

#import "singleton.h"

#import "myViewController.h"

@interface UsingJSONViewController : UIViewController

{

IBOutlet UITableView *tableview;

//NSURLConnection *conn;

NSMutableData *webData;

NSDictionary *parsedJSON;

NSMutableArray *CatId;

NSMutableArray *CategoryName;

NSMutableArray *BTID;

}

@property (nonatomic, retain) UITextField *txtLat;

@property (nonatomic, retain) UITextField *txtLng;

@property (strong,nonatomic) UITableView *tableview;

@property(nonatomic,strong) NSMutableArray *CatId;

@property(nonatomic,strong)NSMutableArray *CategoryName;

@property(nonatomic,strong)NSMutableArray *BTID;

-(IBAction)btnGetWeather;

@end

vc.m

//

// UsingJSONViewController.m

// UsingJSON

//

// Created by Wei-Meng Lee on 28/8/11.

//

#import "UsingJSONViewController.h"

@implementation UsingJSONViewController

@synthesize tableview;

@synthesize CatId,CategoryName,BTID;

-(IBAction)btnGetWeather

{

NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];

// [request setURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://118.139.178.115/IMLocal/DeviceServices/FetchCompCategoryByCategoryId.aspx"]]];

[request setURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://118.139.178.115/SkilledTradesDepot/DevicesServices/FetchCategoryByTrade.aspx"]]];

// [request setHTTPMethod:@"POST"];

// [request setValue:postLength forHTTPHeaderField:@"Content-Length"];

[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Current-Type"];

// [request setHTTPBody:postData];

NSURLConnection *conn = [[NSURLConnection alloc]initWithRequest:request delegate:self];

if(conn)

{

NSLog(@"Connection Successful");

}

else

{

NSLog(@"Connection could not be made");

}

webData = [[NSMutableData alloc]init];

}

-(void) connection:(NSURLConnection *)connection

didReceiveResponse:(NSURLResponse *) response{

[webData setLength: 0];

}

-(void) connection:(NSURLConnection *)connection

didReceiveData:(NSData *) data

{

[webData appendData:data];

}

-(void)handleResponce:(NSString *)data

{

SBJsonParser *json = [[SBJsonParser new] autorelease];

NSError *jsonError;

parsedJSON = [json objectWithString:data error:&jsonError];

NSLog(@"parse...%@",parsedJSON);

//NSDictionary* menu = [parsedJSON objectForKey:@"DTOCollection"];

NSArray *array =[parsedJSON objectForKey:@"DTOCollection"];

NSLog(@"%@",array);

NSDictionary* menu = [array objectAtIndex:1];

NSDictionary* menu1 = [menu objectForKey:@"DTOJson"];

NSLog(@"%@",menu1);

// CatId= [[NSMutableArray alloc]init];

[singleton show].array=[[NSMutableArray alloc]init ];

for(int counter =0;counter< menu1.count;counter++)

{

NSString* str = [NSString stringWithFormat:@"%i", counter];

// NSDictionary* menu1 = [menu objectForKey:str];

NSDictionary* menuOne =[menu1 objectForKey:str];

NSLog(@"%@",menuOne);

NSString *strbtid=[menuOne objectForKey:@"BTID"];

NSLog(@"BTID----%@",strbtid);

NSString *strcatid=[menuOne objectForKey:@"CatId"];

NSLog(@"CatID----%@",strcatid);

NSString *strcategoryname=[menuOne objectForKey:@"CategoryName"];

NSLog(@"CategoryName---%@",strcategoryname);

[ [singleton show].array addObject:strcategoryname];

[[singleton show].array addObject:strbtid];

[[singleton show].array addObject:strcatid];

}

//myViewController *my=[[myViewController alloc]init ];

//[my.tbl reloadData ];

}

/*-(IBAction)ButtonTapped:(id)sender

{

NSString *strURL=[NSString stringWithFormat:@"URl Name here"];

NSURL *url=[NSURL URLWithString:strURL];

self.request=[NSURLRequest requestWithURL:url]

self.nsCon=[[NSURLConnection alloc] initWithRequest:request delegate:self];

if(self.nsCon)

{

self.webData=[[NSMutableData alloc] init];

}

else

{

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Error",@"") message:NSLocalizedString(@"Not Connected Other View !!",@"") delegate:nil cancelButtonTitle:NSLocalizedString(@"OK",@"") otherButtonTitles:nil];

[alert show];

[alert release];

}

}*/

-(void) connection:(NSURLConnection *)connection

didFailWithError:(NSError *) error {

[webData release];

}

-(void) connectionDidFinishLoading:(NSURLConnection *) connection

{

NSLog(@"DONE. Received Bytes: %d", [webData length]);

NSString *strResult = [[NSString alloc] initWithBytes:[webData mutableBytes]

length:[webData length]

encoding:NSUTF8StringEncoding];

NSLog(@"DONE. Received Bytes: %@", strResult);

[self handleResponce:strResult];

// NSDictionary *result = [strResult JSONValue];

// for (id theKey in result) {

// NSDictionary *detailedItems = [result objectForKey:theKey];

// UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Result"

// message:strResult

// delegate:self

// cancelButtonTitle:@"OK"

// otherButtonTitles:nil];

// [alert show];

// [alert release];

//

// NSLog(@"Key is %@, Value is %@", theKey, detailedItems);

// for (id detailedKey in detailedItems) {

// id detailedValue = [detailedItems objectForKey:detailedKey];

// NSLog(@"Key is %@, Value is %@", detailedKey, detailedValue);

// }

[strResult release];

[webData release];

}

-(void) dealloc

{

// [txtLat release];

// [txtLng release];

[super dealloc];

}

- (void)didReceiveMemoryWarning

{

[super didReceiveMemoryWarning];

// Release any cached data, images, etc that aren't in use.

}

#pragma mark - View lifecycle

-(IBAction)loadData

{

}

- (void)viewDidLoad

{

[super viewDidLoad];

[self btnGetWeather];

// Do any additional setup after loading the view, typically from a nib.

}

- (void)viewDidUnload

{

[super viewDidUnload];

// Release any retained subviews of the main view.

// e.g. self.myOutlet = nil;

}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{

return 1;

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

return 2;

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

static NSString *CellIdentifier = @"Cell";

UITableViewCell *cell = [tableview dequeueReusableCellWithIdentifier:CellIdentifier];

if(cell==nil)

{

cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]autorelease];

}

NSLog(@"xcxcx%@",[singleton show].lbl);

cell.textLabel.text=[CatId objectAtIndex:indexPath.row];

NSLog(@"xcxcx%@",[CatId objectAtIndex:indexPath.row]);

return cell;

}

#pragma mark - Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

{

myViewController *my=[[myViewController alloc]init];

[self.navigationController pushViewController:my animated:YES];

NSLog(@"xcxcx%@",[CatId objectAtIndex:indexPath.row]);

}

- (void)viewWillAppear:(BOOL)animated

{

[super viewWillAppear:animated];

}

- (void)viewDidAppear:(BOOL)animated

{

[super viewDidAppear:animated];

}

- (void)viewWillDisappear:(BOOL)animated

{

[super viewWillDisappear:animated];

}

- (void)viewDidDisappear:(BOOL)animated

{

[super viewDidDisappear:animated];

}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

{

// Return YES for supported orientations

return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);

}

@end

myvc.h

//

// myViewController.h

// UsingJSON

//

// Created by ugsa on 9/11/12.

//

#import <UIKit/UIKit.h>

#import "custom.h"

#import "singleton.h"

@interface myViewController : UIViewController

{ IBOutlet UITableView *tbl;

NSMutableArray *receivedData;

NSString *strCat;

NSString *str1;

NSString *str2;

}

@property(strong,nonatomic)UITableView *tbl;

@property(strong,nonatomic)NSMutableArray *receivedData;

@property(strong,nonatomic)NSString *strCat;

@property(strong,nonatomic)NSString *str1;

@property(strong,nonatomic)NSString *str2;

@end

myvc.m

//

// myViewController.m

// UsingJSON

//

// Created by ugsa on 9/11/12.

//

#import "myViewController.h"

@interface myViewController ()

@end

@implementation myViewController

@synthesize tbl,receivedData,strCat;

- (void)viewDidLoad

{

[super viewDidLoad];

}

// Uncomment the following line to preserve selection between presentations.

// self.clearsSelectionOnViewWillAppear = NO;

// Uncomment the following line to display an Edit button in the navigation bar for this view controller.

// self.navigationItem.rightBarButtonItem = self.editButtonItem;

- (id)initWithStyle:(UITableViewStyle)style

{

self = [super initWithStyle:style];

if (self) {

// Custom initialization

}

return self;

}

- (void)viewDidUnload

{

[super viewDidUnload];

// Release any retained subviews of the main view.

// e.g. self.myOutlet = nil;

}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

{

return (interfaceOrientation == UIInterfaceOrientationPortrait);

}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{

return 1;

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

return [[singleton show].array count];

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

static NSString *CellIdentifier = @"Cell";

custom *cell = [tbl dequeueReusableCellWithIdentifier:CellIdentifier];

if(cell==nil)

{

cell = [[[custom alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]autorelease];

}

NSLog(@"xcxcx%@",[singleton show].array);

// NSLog(@"xcxcx%@",[singleton show].lbl);

NSString *str= [NSString stringWithFormat:@"%@", [[singleton show].array objectAtIndex:indexPath.row]];

NSLog(@"xcxcx%@",str);

cell.lbl.text=str;

// NSString *str1= [NSString stringWithFormat:@"%@", [[singleton show].array objectAtIndex:indexPath.row]];

// NSLog(@"xcxcx%@",str1);

// cell.lbl1.text=str1;

// NSString *str2= [NSString stringWithFormat:@"%@", [[singleton show].array objectAtIndex:indexPath.row]];

//NSLog(@"xcxcx%@",str2);

// cell.lbl2.text=str2;

return cell;

}

#pragma mark - Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

{

NSLog(@"xcxcx%@",[singleton show].array);

}

-(void)dealloc

{

//[firstViewController release];

[super dealloc];

}

@end

single ton.com

//

// singleton.h

// UsingJSON

//

// Created by ugsa on 9/13/12.

//

#import <Foundation/Foundation.h>

@interface singleton : NSObject

{

NSString *tf;

NSString *lbl;

NSMutableArray *array;

}

@property (strong, nonatomic) NSString *tf;

@property (strong, nonatomic) NSString *lbl;

@property (strong,nonatomic)NSMutableArray *array;

+(singleton *)show;

@end

singleton.m

//

// singleton.m

// UsingJSON

//

// Created by ugsa on 9/13/12.

//

#import "singleton.h"

@implementation singleton

@synthesize tf,lbl;

@synthesize array;

static singleton* _show=nil;

+(singleton *)show

{

@synchronized([singleton class])

{

if (!_show)

_show=[[self alloc] init];

return _show;

}

return nil;

}

+(id)alloc

{

@synchronized([singleton class])

{

NSAssert(_show == nil, @"Attempted to allocate a second instance of a singleton.");

_show = [super alloc];

return _show;

}

return nil;

}

-(id)init {

self = [super init];

if (self != nil) {

}

return self;

}

@end

custom.h

//

// custom.h

// UsingJSON

//

// Created by ugsa on 9/17/12.

//

#import <UIKit/UIKit.h>

@interface custom : UITableViewCell

{

IBOutlet UILabel *lbl;

IBOutlet UILabel *lbl1;

IBOutlet UILabel *lbl2;

}

@property(strong,nonatomic)UILabel *lbl;

@property(strong,nonatomic)UILabel *lbl1;

@property(strong,nonatomic)UILabel *lbl2;

@end

custom.m

//

// custom.m

// UsingJSON

//

// Created by ugsa on 9/17/12.

//

#import "custom.h"

@implementation custom

@synthesize lbl,lbl1,lbl2;

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier

{

self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];

if (self) {

lbl = [[UILabel alloc]initWithFrame:CGRectMake(10, 10, 100, 30)];

lbl.textColor = [UIColor grayColor];

[self.contentView addSubview:lbl];

//lbl1 = [[UILabel alloc]initWithFrame:CGRectMake(30, 10, 120, 40)];

//lbl1.textColor = [UIColor grayColor];

//[self.contentView addSubview:lbl1];

//lbl2 = [[UILabel alloc]initWithFrame:CGRectMake(50, 10, 140, 50)];

//lbl2.textColor = [UIColor grayColor];

//[self.contentView addSubview:lbl2];

}

// Initialization code

return self;

}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated

{

[super setSelected:selected animated:animated];

// Configure the view for the selected state

}

@end

Sachin Bhardwaj · Answer

Question is what.... If u want why we use json than check it on http://www.c-sharpcorner.com/UploadFile/d49768/json-in-iphone/