1.推荐使用AFN的框架提交最简单,网上很多例子这就不说了

2.只提交数据,没实现提交图片

3.说明: 写入的文字数据：一条表单分割符(--BOUNDARY) + "key" + "value" + 一条表单分隔符;

-(void)uploadDataWithUrl2:(NSString *)url{
    NSString *urlStr = [NSString stringWithFormat:@"%@%@",APIURL,url];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlStr]];
    [request setHTTPMethod:@"POST"];
    [request setTimeoutInterval:100];
    NSError *error;
    NSDictionary *locationDict = @{@"address":self.LastAddress,@"latitude":self.latitude,@"longitude":self.longitude,@"loctype":@"GPS定位"};
    NSData *requestData = [NSJSONSerialization dataWithJSONObject:locationDict options:NSJSONWritingPrettyPrinted error:&error];
    NSString *data = [[NSString alloc]initWithData:requestData encoding:NSUTF8StringEncoding];
    NSMutableData *body = [NSMutableData data];
    //分隔 开始
    [body appendData:[self getDataWithString:@"--BOUNDARY\r\n" ]];
    //第一个参数
    NSString *dispositions_data = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n",@"locationdata"];
    [body appendData:[self getDataWithString:dispositions_data]];
    [body appendData:[self getDataWithString:@"\r\n"]];
    [body appendData:[self getDataWithString:data]];
    [body appendData:[self getDataWithString:@"\r\n"]];
    //分隔
    [body appendData:[self getDataWithString:@"--BOUNDARY\r\n" ]];
    //第二个参数
    NSString *dispositions_clientid = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n",@"clientid"];
    [body appendData:[self getDataWithString:dispositions_clientid]];
    [body appendData:[self getDataWithString:@"\r\n"]];
    [body appendData:[self getDataWithString:self.recommendCode]];
    [body appendData:[self getDataWithString:@"\r\n"]];
    //分隔
    [body appendData:[self getDataWithString:@"--BOUNDARY\r\n" ]];
    //第三个参数
    NSString *deviceID = [[NSUserDefaults standardUserDefaults] objectForKey:@"deviceID"];
    NSString *dispositions_mac = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n",@"mac"];
    [body appendData:[self getDataWithString:dispositions_mac]];
    [body appendData:[self getDataWithString:@"\r\n"]];
    [body appendData:[self getDataWithString:deviceID]];
    [body appendData:[self getDataWithString:@"\r\n"]];
    //分隔结束
    [body appendData:[self getDataWithString:@"--BOUNDARY\r\n" ]];
    

    request.HTTPBody = body;
    [request setValue:[NSString stringWithFormat:@"%lu",(unsigned long)body.length] forHTTPHeaderField:@"Content-Length"];
    [request setValue:@"multipart/form-data; boundary=BOUNDARY" forHTTPHeaderField:@"Content-Type"];
    NSURLSession *session = [NSURLSession sharedSession];
    NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        if (error) {
            return ;
        }
        NSString *result = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"result=%@",result);
    }];
    [dataTask resume];
    
}
-(NSData *)getDataWithString:(NSString *)string{
    NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];
    return data;
}