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Delegate - Protocols - WebService

LocationTableViewController.h

//
//  LocationTableViewController.h
//  ProtocolsDelegates
//
//  Created by Vasudev Kumaran on 14/12/17.
//  Copyright © 2017 NSE. All rights reserved.
//

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

@interface LocationTableViewController : UITableViewController<WebServiceDelegate>

@property NSArray *locationArray;
@property WebService *webService;
@end

LocationTableViewController.m

//
//  LocationTableViewController.m
//  ProtocolsDelegates
//
//  Created by Vasudev Kumaran on 14/12/17.
//  Copyright © 2017 NSE. All rights reserved.
//

#import "LocationTableViewController.h"

@interface LocationTableViewController ()

@end

@implementation LocationTableViewController
@synthesize locationArray,webService;
- (void)viewDidLoad {
    [super viewDidLoad];
    locationArray = @[];
    webService = [[WebService alloc]init];
    [webService setDelegate:self];
    [webService serviceConnect:@"https://maps.googleapis.com/maps/api/geocode/json?latlng=19.0811811,72.8843373&key=AIzaSyAefNTGyrxrJulbo7AuswChXv7BWDM4I0A"];
    // 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;
}

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

#pragma mark - Table view data source

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

    return 1;
}

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

    return [locationArray count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"locationCell" forIndexPath:indexPath];
    UILabel *addressLbl = [(UILabel *)cell viewWithTag:10];
    NSDictionary *addressDic = [locationArray objectAtIndex:indexPath.row];
    addressLbl.text = [addressDic objectForKey:@"formatted_address"];
    // Configure the cell…
    
    return cell;
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

#pragma mark - WebServiceDelegate methods

-(void)getWebServiceResultFromGoogle:(NSDictionary *)result{
    NSString *status = [result objectForKey:@"status"];
    if ([status isEqualToString:@"OK"]){
        locationArray = [result objectForKey:@"results"];
        [self.tableView reloadData];
    }
}

-(void)getWebServiceResult:(NSString *)result{
    
}

@end

WebService.h

//
//  WebService.h
//  ProtocolsDelegates
//
//  Created by Vasudev Kumaran on 14/12/17.
//  Copyright © 2017 NSE. All rights reserved.
//

#import <Foundation/Foundation.h>

@protocol WebServiceDelegate<NSObject>
    -(void)getWebServiceResult:(NSString *)result;
    -(void)getWebServiceResultFromGoogle:(NSDictionary *)result;
@end

@interface WebService : NSObject

@property id<WebServiceDelegate> delegate;

-(void)startTimer;
-(void)endTimer;
-(void)serviceConnect:(NSString *)url;

@end

WebService.m

//
//  WebService.m
//  ProtocolsDelegates
//
//  Created by Vasudev Kumaran on 14/12/17.
//  Copyright © 2017 NSE. All rights reserved.
//

#import "WebService.h"

@implementation WebService

@synthesize delegate;

-(void)serviceConnect:(NSString *)url{
    NSURL *webUrl = [NSURL URLWithString:url];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:webUrl cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:250];
    [request setHTTPMethod:@"GET"];
    //request setValue:<#(nullable NSString *)#> forHTTPHeaderField:<#(nonnull NSString *)#>
    NSURLSession *session = [NSURLSession sharedSession];

    NSURLSessionTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error){
        
        NSHTTPURLResponse *httpResp = (NSHTTPURLResponse *)response;
        if (httpResp.statusCode == 200){
            //we have a result
            NSError *errorObj;
            NSDictionary *resultDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&errorObj];
            NSString *status = [resultDict objectForKey:@"status"];
            NSLog(@"%@",status);
            dispatch_async(dispatch_get_main_queue(),^(void){
                [delegate getWebServiceResultFromGoogle:resultDict];
            });
            
        }
        
    }];
    
    [task resume];
    
    
}

-(void)startTimer{
    [NSTimer scheduledTimerWithTimeInterval:5 target:self selector:@selector(endTimer) userInfo:nil repeats:NO];
    
}

-(void)endTimer{
    [delegate getWebServiceResult:@"COMPLETED"];
}

@end

iOS

2017-12-19 00:07:26
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