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WebService Example

ViewController.h

#import <UIKit/UIKit.h>
#import "WebService.h"

@interface ViewController : UIViewController<WebServiceDelegate>

@property(nonatomic,retain)WebService *webService;

@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

@synthesize webService;

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    webService = [[WebService alloc]init];
    webService.delegate = self;
    [webService getResponseFromServer:@"https://maps.googleapis.com/maps/api/geocode/json?latlng=40.714224,-73.961452" withParam:@{@"user":@"dev"}];
}

-(void)getWebServiceResult:(NSDictionary *)jsonResults{
   // NSLog(@"Source %@",jsonResults);
    NSArray *resultArray = [jsonResults objectForKey:@"results"];
    
    for (NSDictionary *dic in resultArray) {
        NSLog(@"%@",[dic objectForKey:@"formatted_address"]);
    }
    
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

WebService.h

#import <Foundation/Foundation.h>

@class WebService;

@protocol WebServiceDelegate <NSObject>

-(void)getWebServiceResult:(NSDictionary *)jsonResults;

@end

@interface WebService : NSObject

@property (nonatomic,retain) id <WebServiceDelegate> delegate;

-(void)getResponseFromServer:(NSString *)url withParam:(NSDictionary *)params;
@end

WebService.m

#import "WebService.h"

@implementation WebService

@synthesize delegate;

-(NSData *)buildHttpData:(NSDictionary *)params{
    
    NSMutableArray *array = [[NSMutableArray alloc]init];
    
    for (NSString *key in params) {
        id obj = [params valueForKey:key];
        NSString *valueString;
        if ([obj isKindOfClass:[NSString class]]){
            valueString = obj;
        }else if([obj isKindOfClass:[NSNumber class]]){
            valueString = [(NSNumber *)obj stringValue];
        }
        
        [array addObject:[NSString stringWithFormat:@"%@=%@",key,valueString]];
    }
    
    NSString *stringParams = [array componentsJoinedByString:@"&"];
    /*
    latlng=40.714224,-73.961452&format=json&user=dev&pass=safasd
    */
    return  [stringParams dataUsingEncoding:NSUTF8StringEncoding];
}

-(void)getResponseFromServer:(NSString *)url withParam:(NSDictionary *)params{
    /*
    NSDictionary *p = @{@"latlng":@"40.714224,-73.961452",@"format":@"json",@"username":@"dev",@"password":@"sdfsdsdgsd"};
     
     */
    NSData *dataToBeSent = [self buildHttpData:params];
    NSURL *webUrl = [NSURL URLWithString:url];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:webUrl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:240];
    
    [request setHTTPMethod:@"POST"];
    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
    [request setValue:[NSString stringWithFormat:@"%d",dataToBeSent.length] forHTTPHeaderField:@"Content-Length"];
    [request setHTTPBody:dataToBeSent];
    
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue currentQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
        if ([(NSHTTPURLResponse *)response statusCode] == 200){
            NSError *error;
            //[NSXMLParser
            NSDictionary *responseJson = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];
            [delegate getWebServiceResult:responseJson];
        }
    }];
    
    
    
    
    
}

@end

iOS

2017-12-19 00:07:26
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7) Shopping List IOS App - Part 1
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8) Shopping List IOS App - API Calls
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9) Delegate - Protocols - WebService
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10) NSMutableArray - NSMutableDictionary - TableViewController
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11) UITableViewController
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23) Shopping List App - Cloud - Part 2
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24) Shopping List App - Cloud - Part 1
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25) Protocol And Delegates With NSURLSession
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26) Webservice Using NSURLSession
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32) Manual Segue
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33) TableViewController Example
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34) NSArray And NSDictionary
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35) Reverse (Unwind) Segue
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36) ViewController - Segue - Messages
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37) WebService Example
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38) CoreData Example

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