一.创建文件

二.在.m文件中添加

//URL上传接口     fileName图片名称    data图片的数据流

+(instancetype)requestWithURL:(NSURL *)URL fileName:(NSString *)fileName localImageData:(NSData *)data

{

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL cachePolicy:1 timeoutInterval:2.0f];

    request.HTTPMethod = @"POST";

    request.timeoutInterval = 1000.0; //请求超时

//    拼接请求体

    NSMutableData *requestData = [NSMutableData data];

//    1.分隔符

    NSString *boundary = @"72D4CD655314C423";

    NSMutableString *imageString = [NSMutableString stringWithFormat:@"\r\n--%@\r\n",boundary];

//    2.Content-Disposition: form-data; name="uploadFile"; filename="001.png"\r\n  // 这里注明服务器接收图片的参数（类似于接收用户名的userName）及服务器上保存图片的文件名

    [imageString appendString:[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"uploadFile\"; filename=\"%@\"\r\n",fileName]];

//    3.Content-Type:image/png \r\n  // 图片类型为png

    [imageString appendString:[NSString stringWithFormat:@"Content-Type:application/octet-stream\r\n"]];

//    4.Content-Transfer-Encoding: binary\r\n\r\n  // 编码方式

    [imageString appendString:@"Content-Transfer-Encoding: binary\r\n\r\n"];

//    转成二进制

    [requestData appendData:[imageString dataUsingEncoding:NSUTF8StringEncoding]];

//    5.文件数据部分  --data为图片的数据流

    [requestData appendData:data];

//    6.分隔符结尾

    [requestData appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary]dataUsingEncoding:NSUTF8StringEncoding]];

//    请求体

    request.HTTPBody = requestData;

//    设置请求头

//    Content-Type

    NSString *headStr=[NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];

    [request setValue:headStr forHTTPHeaderField:@"Content-Type"];

    return request;

}

三.ViewController内的调用

1.相册中选中图片获取数据

// 当得到照片或者视频后，调用该方法

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{

// 判断获取类型：图片

    UIImage *theImage = nil;

    // 判断，图片是否允许修改

    if ([picker allowsEditing]){

        //获取用户编辑之后的图像

        theImage = [info objectForKey:UIImagePickerControllerEditedImage];

    } else {

        // 照片的元数据参数

        theImage = [info objectForKey:UIImagePickerControllerOriginalImage];

    }

//数据流

self.imageDataSec=UIImageJPEGRepresentation(theImage, 0.1);

[self upDataImage];

[picker dismissViewControllerAnimated:YES completion:^{

    }];

}

-(void)upDataImage{

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url fileName:[NSString stringWithFormat:@"%@.jpg",imgName] localFilepath:self.imageDataSec];

    //连接(NSURLSession)

    NSURLSession *session=[NSURLSession sharedSession];

    NSURLSessionDataTask *dataTask=[session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {

           id result=[NSJSONSerialization JSONObjectWithData:data options:0 error:nil];

           NSLog(@"%@",result);

    }];

    [dataTask resume];

}