POST request to a URL using Objective-C

sendPOSTRequestWithUR.m

- (void)sendPOSTRequestWithURL:(NSURL *)url parameters:(NSDictionary *)parameters completionHandler:(void (^)(NSData *, NSURLResponse *, NSError *))completionHandler {
    // Create a mutable URL request
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    
    // Set the request method to POST
    [request setHTTPMethod:@"POST"];
    
    // Set the request body with the parameters
    NSData *postData = [NSJSONSerialization dataWithJSONObject:parameters options:0 error:nil];
    [request setHTTPBody:postData];
    
    // Create a session configuration
    NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
    
    // Create a session with the configuration
    NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration];
    
    // Create a data task with the request
    NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request completionHandler:completionHandler];
    
    // Start the data task
    [dataTask resume];
}


NSURL *url = [NSURL URLWithString:@"https://example.com/api"];
NSDictionary *parameters = @{@"key1": @"value1", @"key2": @"value2"};

[self sendPOSTRequestWithURL:url parameters:parameters completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    if (error) {
        NSLog(@"Error: %@", error);
    } else {
        // Handle the response data
    }
}];