iOS开发之文件上传

#define XLBoundary @"XL"#define XLLine @"\r\n"#define XLEncode(string) [string dataUsingEncoding:NSUTF8StringEncoding]// 1.请求服务器地址NSURL *serverURL = [NSURL URLWithString:@""];// 2.创建一个POST请求NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:serverURL];request.HTTPMethod = @"POST";// 3.设置请求体NSMutableData *body = [NSMutableData data];// 设置文件的其他参数NSDictionary *params = @{@"":@""};// 文件参数// 分界线[body appendData:XLEncode(@"--")];[body appendData:XLEncode(XLBoundary)];// 换行[body appendData:XLEncode(XLLine)];// 获取本地文件的地址， 同时转换成URL编码 文件的名字 文件的后缀名NSURL *urlPath = [[NSBundle mainBundle] URLForResource:@"" withExtension:@""];// 创建请求NSURLRequest *requestPath = [NSURLRequest requestWithURL:urlPath];// 发送请求NSURLResponse *response = nil;// 通过发送本地文件路径获取 MIMEType[NSURLConnection sendSynchronousRequest:requestPath returningResponse:&response error:nil];NSString *mimeType = response.MIMEType;// 声明上传文件的格式NSString *type = [NSString stringWithFormat:@"Content-Type:%@", mimeType];[body appendData:XLEncode(type)];// 换行[body appendData:XLEncode(XLLine)];// 将本地文件路径转换为data数据类型NSData *fileData = [NSData dataWithContentsOfURL:urlPath];[body appendData:XLEncode(XLLine)];[body appendData:fileData];[body appendData:XLEncode(XLLine)];// 要上传的文件名NSString *fileName = @"";// 添加字段名称NSString *disposition = [NSString stringWithFormat:@"Content-Disposition:form-data; name=\"file\"; filename\"%@\"", fileName];[body appendData:XLEncode(disposition)];[body appendData:XLEncode(XLLine)];// 非文件参数[params enumerateKeysAndObjectsUsingBlock:^(id  _Nonnull key, id  _Nonnull obj, BOOL * _Nonnull stop) {    [body appendData:XLEncode(@"--")];    [body appendData:XLEncode(XLBoundary)];    [body appendData:XLEncode(XLLine)];        NSString *disposition = [NSString stringWithFormat:@"Content-Disposition:form-data; name=\"%@\"", key];    [body appendData:XLEncode(disposition)];    [body appendData:XLEncode(XLLine)];    [body appendData:XLEncode(XLLine)];    [body appendData:XLEncode([obj description])];    [body appendData:XLEncode(XLLine)];}];// 结束标记[body appendData:XLEncode(@"--")];[body appendData:XLEncode(XLBoundary)];[body appendData:XLEncode(@"--")];[body appendData:XLEncode(XLLine)];// 设置HTTPBodyrequest.HTTPBody = body;// 4.设置请求头(告诉服务器这次传的诗歌文件数据， 同时是一个上传的请求)NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", XLBoundary];[request setValue:contentType forHTTPHeaderField:@"Content-type"];// 5.发送请求[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {}];