​@property (weak, nonatomic) IBOutlet UIActivityIndicatorView *loadingSign;

​- (void)startAnimation{
self.loadingSign.hidden = NO;
[self.loadingSign startAnimating];
}

- (void)stopAnimation{
self.loadingSign.hidden = YES;
[self.loadingSign stopAnimating];
}

String *webSiteString = @"webseite";
NSURL *webSiteUrl = [NSURL URLWithString:webSiteString];
NSError *error;

NSString *webPage = [NSString stringWithContentsOfURL:webSiteUrl
encoding:NSASCIIStringEncoding
error:&error];

NSString *webSiteString = @"http://google.com";

NSURL *webSiteUrl = [NSURL URLWithString:webSiteString];

NSURLRequest *Request = [NSURLRequest requestWithURL:webSiteUrl];

[NSURLConnection

sendAsynchronousRequest:Request

queue:[[NSOperationQueue alloc] init]

completionHandler:^(NSURLResponse *response,

NSData *data,

NSError *error)

NSString *pageContent = [[Request URL] absoluteString];

NSLog(@"Content: %@", pageContent);

@interface ViewController : UIViewController<NSURLConnectionDelegate>
{
NSMutableData *_responseData;
}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
_responseData = [[NSMutableData alloc] init];
}

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

- (NSCachedURLResponse *)connection:(NSURLConnection *)connection willCacheResponse:(NSCachedURLResponse*)cachedResponse {
return nil;
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
NSLog(“ok”);
}

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
NSLog(“error”);
}

-(BOOL)readData{
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://google.com"]];
NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];
}