使用Objective-C发布图像和其他参数的多部分/表单数据

// 创建请求的URL
NSURL *url = [NSURL URLWithString:@"http://example.com/upload"];

// 创建请求对象
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"POST"];

// 创建多部分/表单数据
NSMutableData *postData = [NSMutableData data];

// 设置请求头部信息
NSString *boundary = @"---------------------------Boundary";
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
[request setValue:contentType forHTTPHeaderField:@"Content-Type"];

// 添加图像数据
UIImage *image = [UIImage imageNamed:@"image.jpg"];
NSData *imageData = UIImageJPEGRepresentation(image, 1.0);
[postData appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[@"Content-Disposition: form-data; name=\"image\"; filename=\"image.jpg\"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[@"Content-Type: image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:imageData];
[postData appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

// 添加其他参数
NSString *param1 = @"value1";
NSString *param2 = @"value2";
[postData appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"param1\"\r\n\r\n%@", param1] dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"param2\"\r\n\r\n%@", param2] dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

// 添加结束标识符
[postData appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

// 设置请求体
[request setHTTPBody:postData];

// 发送请求
NSURLSessionDataTask *task = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    // 处理响应
}];
[task resume];