iOS 图片上传

AFHTTPRequestOperationManager *mgr = [AFHTTPRequestOperationManager manager];
        mgr.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json",@"text/html",@"text/plain", nil];

        mgr.requestSerializer = [AFHTTPRequestSerializer serializer];
        mgr.responseSerializer = [AFHTTPResponseSerializer serializer];
        // 2.封装参数(这个字典只能放非文件参数)
        NSMutableDictionary *param = [NSMutableDictionary dictionary];
        param[@"file"] = @"picture";
        //    param[@"file"] = @"picture2";
        // 2.发送一个请求

        [SVProgressHUD showWithStatus:@"正在上传"];
        [mgr POST:BMJZUploadImage parameters:param constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
            NSData *fileData = UIImageJPEGRepresentation(image, 0.05);

            [formData appendPartWithFileData:fileData name:@"file" fileName:@"zhengmian.jpg" mimeType:@"image/jpeg"];
        } success:^(AFHTTPRequestOperation *operation, id responseObject) {
            NSLog(@"上传成功");

            NSMutableString *result = (NSMutableString *)[[NSString alloc] initWithData:responseObject  encoding:NSUTF8StringEncoding];
        } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
            NSLog(@"%@", error);
        }];