ios之AFN上传下载详细步骤(2)

 五.AFN
 .GET\POST
 > GET请求
 // 1.获得请求管理者
 AFHTTPRequestOperationManager *mgr = [AFHTTPRequestOperationManager manager];

 // 2.封装请求参数
 NSMutableDictionary *params = [NSMutableDictionary dictionary];
 params[@"username"] = @"";
 params[@"pwd"] = @"";

 // 3.发送GET请求
 [mgr GET:@"http://baidu.com/login" parameters:params
  success:^(AFHTTPRequestOperation *operation, id responseObject) {
      NSLog(@"请求成功---%@", responseObject);
  }
  failure:^(AFHTTPRequestOperation *operation, NSError *error) {
      NSLog(@"请求失败---%@", error);
  }];

 > POST请求
 // 1.获得请求管理者
 AFHTTPRequestOperationManager *mgr = [AFHTTPRequestOperationManager manager];

 // 2.封装请求参数
 NSMutableDictionary *params = [NSMutableDictionary dictionary];
 params[@"username"] = @"";
 params[@"pwd"] = @"";

 // 3.发送POST请求
 [mgr POST:@"http://baidu.com/login" parameters:params
  success:^(AFHTTPRequestOperation *operation, id responseObject) {
      NSLog(@"请求成功---%@", responseObject);
  }
  failure:^(AFHTTPRequestOperation *operation, NSError *error) {
      NSLog(@"请求失败---%@", error);
  }];

 .文件上传
 // 1.获得请求管理者
 AFHTTPRequestOperationManager *mgr = [AFHTTPRequestOperationManager manager];

 // 2.发送请求(做文件上传)
 #warning parameters : 只能放非文件参数
 NSMutableDictionary *params = [NSMutableDictionary dictionary];
 params[@"username"] = @"zhangsan";

 [mgr POST:@"http://baidu.com/upload" parameters:params
 constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
     // 一定要在这个block中添加文件参数

     // 加载文件数据
     NSString *file = [[NSBundle mainBundle] pathForResource:@"test.txt" ofType:nil];
     NSData *data = [NSData dataWithContentsOfFile:file];

     // 拼接文件参数
     [formData appendPartWithFileData:data name:@"file" fileName:@"123.txt" mimeType:@"text/plain"];
 }
   success:^(AFHTTPRequestOperation *operation, id responseObject) {
       NSLog(@"上传成功----%@", responseObject);
   } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
       NSLog(@"上传失败----%@", error);
   }];