JSON parser

string
{ "name":{
"firstName": "John",
"lastName": "Smith",
"age": 25,
"address":
{
"streetAddress": "21 2nd Street",
"city": "New York",
"state": "NY",
"postalCode": "10021"
},
"phoneNumber":
[
{
"type": "home",
"number": "212 555-1234",
"home":"sdfsdfdsf"
},
{
"type": "fax",
"number": "646 555-4567",
"home":"6666"
}
{
"type": "sun",
"number": "646 555-4567",
"home":"lopppp"
}

]
}
}



//////////////////////// this is how we parse this JSON

- (void)viewDidLoad {
jsonArray= [[NSMutableArray alloc] init] ;
[super viewDidLoad];

responseData = [[NSMutableData data] retain];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://58.185.167.53/rahul/Json/Number.json"]];
[[NSURLConnection alloc] initWithRequest:request delegate:self];
}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
[responseData setLength:0];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[responseData appendData:data];
}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
label.text = [NSString stringWithFormat:@"Connection failed: %@", [error description]];
}
- (void)addRowToLogWindow:(id)data {

label.text = [NSString stringWithFormat:@"Adding data: %@%@", data, label.text]; // adding new row + 2x new line "




}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
[connection release];

NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
[responseData release];

NSError *error;
SBJSON *json = [[SBJSON new] autorelease];

NSDictionary *data = (NSDictionary *) [json objectWithString:responseString error:nil];

NSDictionary *menu = (NSDictionary *) [data objectForKey:@"name"];


NSArray *items = (NSArray *) [menu objectForKey:@"phoneNumber"];






int ndx;

for (ndx = 0; ndx< items.count; ndx++) {

stream = (NSDictionary *)[items objectAtIndex:ndx];


NSLog(@"This is the title of a stream: %@", [stream valueForKey:@"type"]);
[jsonArray addObject:stream];


}

NSLog(@" aray is %@",jsonArray);
NSLog(@" sterab is %@",[stream valueForKey:@"home"]);

[tableview reloadData];



NSLog(@" json coutn is %d",[jsonArray count]);

NSString *luckyNumbers = [json objectWithString:responseString error:&error];
[responseString release];

if (luckyNumbers == nil)
label.text = [NSString stringWithFormat:@"JSON parsing failed: %@", [error localizedDescription]];
else {
NSMutableString *text = [NSMutableString stringWithString:@"Lucky numbers:\n"];

label.text = text;
}
}



#pragma mark tabel

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

//if (searching)
//return 1;
//else

return 1;
}


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



NSLog(@" 43534535353 %d",[jsonArray count]);
return [jsonArray count];


}



//////////// WORKING CELL BIGGER SIZE CODE///////////



- (CGFloat) tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {



/* if(indexPath.row == 0)

return 85;

*/


return 55;

}




////////////// ENDS HERE/////////////


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//UITableView *tableView;
UITableViewCell *cell;
static NSString *CellIdentifier = @"Cell";


//self.tableView.frame = CGRectMake(0,searchBar.bounds.size.height,320,480);






cell= [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil ) {

NSLog(@" inside");
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];



mainLabel = [[[UILabel alloc] initWithFrame:CGRectMake(10.0, 5.0, 220.0, 15.0)] autorelease];

mainLabel.tag =33;

// mainLabel.font = [UIFont systemFontOfSize:14.0];
[mainLabel setFont:[UIFont boldSystemFontOfSize:[UIFont smallSystemFontSize]]];

mainLabel.textAlignment = UITextAlignmentLeft;

mainLabel.textColor = [UIColor blackColor];
mainLabel.highlightedTextColor = [UIColor greenColor];

//mainLabel.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleHeight;

[cell.contentView addSubview:mainLabel];
mainLabel.backgroundColor=[UIColor clearColor];


}

mainLabel.text = [[jsonArray objectAtIndex:indexPath.row] objectForKey:@"number"];
NSLog(@" dicst 5@",stream);
cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton;
return cell;

}

Delegates Concept

delegate performs methods on behalf of another object. A Table View doesn't know what to do when you pick an item in the list. Instead, it has to ask the delegate object a question, specifically, didSelectRowAtIndexPath. The only information the tableview knows is which section and row the user tapped. So the table view gives this information to the delegate object by essentially saying that "Hey, the user tapped Row 4 in Section 0. Do something."

The delegate object finds the didSelectRowAtIndexPath method and executes the code inside.

There are lots of Delegate methods for many different objects. For instance, the Text Field object can't do anything on its own. Instead, it uses a delegate to perform actions. If you press the enter key on the on screen keyboard, the text field asks the delegate object to perform a specific method, textFieldShouldReturn. If the delegate you set for your text field does not have a textFieldShouldReturn method, the text field will not know what to do when you press the enter button.