Parsing the json objects in iphone

//
//  ServiceProxyBase.h


#import <Foundation/Foundation.h>

#define kErrorMessage @"ErrorMessage"
#define kResponseValue @"ResponseValue"
#define kResult @"Result"

@interface ServiceProxyBase : NSObject
{
@protected
    NSString *baseUrlString;
    NSString *serviceUrlName;
}

+ (id)proxy;

- (id)init;

- (BOOL)isValidResult:(NSDictionary *)json;

- (NSArray *)executeServiceWithName:(NSString const *)serviceName parameters:(NSArray *)params;

- (NSArray *)extractResults:(NSData *)jsonData;

@end



//  ServiceProxyBase.m



#import "ServiceProxyBase.h"
#import "NSString+Helpers.h"
#import "Logger.h"
#import "Constants.h"


@implementation ServiceProxyBase

+ (id)proxy
{
    return nil;
}

- (id)init
{
    self = [super init];

    if (self)
    {
        baseUrlString = [[NSUserDefaults standardUserDefaults] objectForKey:BaseUrlKey];
    }

    return self;
}

- (NSURL *)constructUrlForFunctionWithName:(const NSString *)functionName andParameters:(NSArray *)params
{
    if ([baseUrlString isEmpty] || [functionName isEmpty])
    {
        NSLog(NSLocalizedString(@"ErrorBaseUrlMissing", @"Missing component(s) to construct url"));
        return nil;
    }

    if (![baseUrlString hasSuffix:@"/"])
        baseUrlString = [baseUrlString stringByAppendingString:@"/"];

    if (![serviceUrlName hasSuffix:@"/"])
        serviceUrlName = [serviceUrlName stringByAppendingString:@"/"];

    NSMutableString *paramString = nil;
    if (params && params.count > 0)
    {
        paramString = [NSMutableString string];
        for (NSString *value in params)
        {
            [paramString appendFormat:@"/%@", value];
        }
        paramString = [NSMutableString stringWithString:[paramString substringToIndex:paramString.length]];
    }

    NSMutableString *urlString =
            [NSMutableString stringWithFormat:@"%@%@%@%@", baseUrlString, serviceUrlName, functionName,
                                              paramString ? paramString : @""];

    return [NSURL URLWithString:[urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
}

- (BOOL)isValidResult:(NSDictionary *)json
{
    return [[json objectForKey:kErrorMessage] isKindOfClass:[NSNull class]];
}

- (NSArray *)executeServiceWithName:(NSString const *)serviceName parameters:(NSArray *)params
{
    NSURL *url = [self constructUrlForFunctionWithName:serviceName
                                         andParameters:params];

    NSLog(@"executing url %@", url.absoluteString);
    NSURLRequest *request = [NSURLRequest requestWithURL:url
                                             cachePolicy:NSURLRequestReloadIgnoringCacheData
                                         timeoutInterval:15];
    NSURLResponse *response;
    NSError *error;
    NSData *data = [NSURLConnection sendSynchronousRequest:request
                                         returningResponse:&response
                                                     error:&error];

    if (error)
    {
        [Logger logMessage:error.localizedDescription ofType:LogMessageTypeError];
        return nil;
    }

    if (!data)
    {
        NSString *message =
                [NSString stringWithFormat:@"No data is returned for url %@", url];
        [Logger logMessage:message ofType:LogMessageTypeError];
        return nil;
    }

    return [self extractResults:data];
}

- (NSArray *)extractResults:(NSData *)jsonData
{
    NSError *error;
    NSDictionary *jsonObject = [NSJSONSerialization JSONObjectWithData:jsonData
                                                               options:NSJSONReadingAllowFragments
                                                                 error:&error];

    if (error)
    {
        NSDictionary *userInfo = @{kResponseValue : [[NSString alloc] initWithData:jsonData
                                                                          encoding:NSUTF8StringEncoding]};
        [Logger logMessage:error.localizedDescription ofType:LogMessageTypeError additionalInfo:userInfo];
        return nil;
    }

    return [[jsonObject objectForKey:kResult] isKindOfClass:[NSNull class]] ? nil : [jsonObject objectForKey:kResult];
}

@end

//Logger.h
#import <Foundation/Foundation.h>

typedef enum
{
    LogMessageTypeInfo,
    LogMessageTypeWarn,
    LogMessageTypeError
} LogMessageType;

@interface Logger : NSObject

+ (void)logMessage:(NSString *)message ofType:(LogMessageType)type;

+ (void)logMessage:(NSString *)message ofType:(LogMessageType)type additionalInfo:(NSDictionary *)userInfo;

@end
//Logger.m

#import "Logger.h"


@implementation Logger
{

}

// TODO: expand this to service calls
+ (void)logMessage:(NSString *)message ofType:(LogMessageType)type
{
    NSString *typeString = [self stringFromMessageType:type];
    NSLog(@"%@: %@", typeString, message);
}

+ (void)logMessage:(NSString *)message ofType:(LogMessageType)type additionalInfo:(NSDictionary *)userInfo
{
    NSLog(@"%@: %@, additional information = <%@>", [self stringFromMessageType:type], message, userInfo);
}

#pragma mark - helper

+ (NSString *)stringFromMessageType:(LogMessageType)type
{
    NSString *typeString;
    switch (type)
    {
        case LogMessageTypeError:
            typeString = @"Error";
            break;
        case LogMessageTypeInfo:
            typeString = @"Info";
            break;
        case LogMessageTypeWarn:
            typeString = @"Warning";
            break;
    }
    return typeString;
}

@end

//NSString+Helpers.h
#import <Foundation/Foundation.h>

@interface NSString (Helpers)

- (BOOL)isEmpty;

+ (NSString *)stringFromBool:(BOOL)b;
@end

//NSString+Helpers.m
#import "NSString+Helpers.h"

@implementation NSString (Helpers)

- (BOOL)isEmpty
{
    return self.length == 0;
}

+ (NSString *)stringFromBool:(BOOL)b
{
    return b ? @"true" : @"false";
}

+ (NSString *)stringFromPaymentType:(PaymentType)type
{
    switch (type)
    {
        case PaymentTypeCash:
            return @"PaymentTypeCash";
        case PaymentTypeCard:
            return @"PaymentTypeCard";
    }

    return nil;
}
@end

//Constact.h
#define MainApp @"AppMain"
#define BaseUrlKey @"baseUrl"
#define Login @"Login"
#define LoggedIn @"LoggedIn"
#define StoreID @"1"


//Call the above service
 NSArray *result = [self executeServiceWithName:serviceName
                                        parameters:itemDetailArray];
    or

 dispatch_queue_t queue = dispatch_queue_create("au.com.estrado.productServices.SaveTransaction", NULL);
   
        NSMutableArray *transactionDetailsArray=[[NSMutableArray alloc] initWithArray:self.items];

    dispatch_async(queue, ^
    {
        //TODO: remove hard coding of customer and staff IDs
        //TODO: check the state of the execution, if it fails then do not clear the transaction
        NSLog(@"%@",transactionDetailsArray);
        [[ItemDataController dataController] processTransactionWithDetails:transactionDetailsArray
                                                         forCustomerWithId:1
                                                       servedByStaffWithId:2
                                                           withPaymentType:paymentType
                                                                  isRefund:isRefund];
    });

Passbook example for the iPhone

http://blogs.captechconsulting.com/blog/jonathan-tang/ios-6-tutorial-integrating-passbook-your-applications
https://github.com/tschoffelen/PHP-PKPass
apps.tomttb.com/pkpass/full_sample/
www.raywenderlich.com/20734/beginning-passbook-part-1
www.raywenderlich.com/20785/beginning-passbook-in-ios-6-part-22
http://blogs.captechconsulting.com/blog/jonathan-tang/ios-6-tutorial-integrating-passbook-your-applications
https://github.com/tomasmcguinness/dotnet-passbook
https://www.passslot.com/developer/api/start
https://www.passslot.com/developer/api/start

Mapview streaching like foursquare iPhone app + Ios

http://www.cocoacontrols.com/platforms/ios/controls/a3parallaxscrollview

For creating the html apps for iPhone,android free

- http://publisher.mobileappwizard.com/design/10554
- appgenerator
-mobileappwizard

For display status message to the button of the iPhone

https://github.com/zacaltman/ZAActivityBar

Customized colorful alertview in iphone

https://github.com/m1entus/WCAlertView

Tetris game for iPhone in cocos2d

https://github.com/joshvera/iPhone-Tetris