AFNetworking（3.0+）

1、GET Request

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];[manager GET:@"http://example.com/resources.json" parameters:nil progress:^(NSProgress * _Nonnull downloadProgress) {} success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {}];

2、POST URL-Form-Encoded Request

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];NSDictionary *parameters = @{@"foo": @"bar"};[manager POST:@"http://example.com/resources.json" parameters:parameters progress:^(NSProgress * _Nonnull uploadProgress) {} success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {}];

3、Download

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];NSURL *URL = [NSURL URLWithString:@"http://example.com/download.zip"];NSURLRequest *request = [NSURLRequest requestWithURL:URL];NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {    NSURL *documentsDirectoryURL = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil];    return [documentsDirectoryURL URLByAppendingPathComponent:[response suggestedFilename]];} completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {    NSLog(@"File downloaded to: %@", filePath);}];[downloadTask resume];

4、Upload

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];NSURL *URL = [NSURL URLWithString:@"http://example.com/upload"];NSURLRequest *request = [NSURLRequest requestWithURL:URL];NSURL *filePath = [NSURL fileURLWithPath:@"file://path/to/image.png"];NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithRequest:request fromFile:filePath progress:nil completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {    if (error) {        NSLog(@"Error: %@", error);    } else {        NSLog(@"Success: %@ %@", response, responseObject);    }}];[uploadTask resume];

5、Creating an Upload Task for a Multi-Part Request, with Progress

NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:@"http://example.com/upload" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {        [formData appendPartWithFileURL:[NSURL fileURLWithPath:@"file://path/to/image.jpg"] name:@"file" fileName:@"filename.jpg" mimeType:@"image/jpeg" error:nil];    } error:nil];AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];NSURLSessionUploadTask *uploadTask;uploadTask = [manager              uploadTaskWithStreamedRequest:request              progress:^(NSProgress * _Nonnull uploadProgress) {                  // This is not called back on the main queue.                  // You are responsible for dispatching to the main queue for UI updates                  dispatch_async(dispatch_get_main_queue(), ^{                      //Update the progress view                      [progressView setProgress:uploadProgress.fractionCompleted];                  });              }              completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) {                  if (error) {                      NSLog(@"Error: %@", error);                  } else {                      NSLog(@"%@ %@", response, responseObject);                  }              }];[uploadTask resume];