NSURLSessionTaskを使います。
NSURL *url = [NSURL URLWithString:@"http://www.example.com"];
NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:config];
NSURLSessionTask *task = [session dataTaskWithURL:url completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if (error == nil) {
NSInteger statusCode = ((NSHTTPURLResponse *)response).statusCode;
if (statusCode == 200) {
NSString *downloadData = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"data = %@", downloadData);
} else {
NSLog(@"http error. code = %ld", (long)statusCode);
}
} else {
NSLog(@"error = %@", [error localizedDescription]);
}
[session invalidateAndCancel];
}
];
[task resume];