ios day 7

ViewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <NSURLConnectionDelegate> {
    NSMutableData* _receivedData;
}
@property (weak, nonatomic) IBOutlet UITextField *txtName;
@property (weak, nonatomic) IBOutlet UILabel *lblData;
- (IBAction)btnFetchData1:(id)sender;
- (IBAction)txtFetchData2:(id)sender;

@end

ViewControllerAsynch.m

- (IBAction)txtFetchData2:(id)sender {
    NSString *queryString = [NSString stringWithFormat:@"http://chrisrisner.com/Labs/day7test.php?name=%@", [self.txtName text]];
    NSURLRequest *theRequest=[NSURLRequest
                              requestWithURL:[NSURL URLWithString:
                                              queryString]
                              cachePolicy:NSURLRequestUseProtocolCachePolicy
                              timeoutInterval:60.0];
    [NSURLConnection sendAsynchronousRequest:theRequest queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
        if (error) {
            //do something with error
        } else {
            NSString *responseText = [[NSString alloc] initWithData:data encoding: NSASCIIStringEncoding];
            NSLog(@"Response: %@", responseText);
            
            NSString *newLineStr = @"\n";
            responseText = [responseText stringByReplacingOccurrencesOfString:@"<br />" withString:newLineStr];            
            [self.lblData setText:responseText];
        }
    }];
}

ViewControllerDelegateMethods.m

-(void)connection:(NSConnection*)conn didReceiveResponse:(NSURLResponse *)response
{
    if (_receivedData == NULL) {
        _receivedData = [[NSMutableData alloc] init];
    }
    [_receivedData setLength:0];
    NSLog(@"didReceiveResponse: responseData length:(%d)", _receivedData.length);
}

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


- (void)connection:(NSURLConnection *)connection
  didFailWithError:(NSError *)error {
    NSLog(@"Connection failed! Error - %@ %@",
          [error localizedDescription],
          [[error userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]);
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
    NSLog(@"Succeeded! Received %d bytes of data",[_receivedData length]);
    
    NSString *responseText = [[NSString alloc] initWithData:_receivedData encoding: NSASCIIStringEncoding];
    NSLog(@"Response: %@", responseText);
    
    NSString *newLineStr = @"\n";
    responseText = [responseText stringByReplacingOccurrencesOfString:@"<br />" withString:newLineStr];

    [self.lblData setText:responseText];
}

ViewControllerFetchData1-2.m

- (IBAction)btnFetchData1:(id)sender {
    NSString *queryString = [NSString stringWithFormat:@"http://chrisrisner.com/Labs/day7test.php?name=%@", 
                                 [self.txtName text]];
    NSURLRequest *theRequest=[NSURLRequest
                requestWithURL:[NSURL URLWithString:
                            queryString]
                cachePolicy:NSURLRequestUseProtocolCachePolicy
                timeoutInterval:60.0];
    NSURLConnection *con = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
    if (con) {
        _receivedData=[NSMutableData data];
    } else {
        //something bad happened
    }
}

ViewControllerStartRequest.m

- (IBAction)btnFetchData1:(id)sender {
    NSURLRequest *theRequest=[NSURLRequest
                requestWithURL:[NSURL URLWithString:
                            @"http://chrisrisner.com/Labs/day7test.php"]
                cachePolicy:NSURLRequestUseProtocolCachePolicy
                timeoutInterval:60.0];
    NSURLConnection *con = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
    if (con) {
        _receivedData=[NSMutableData data];
    } else {
        //something bad happened
    }
}