iOS:上传文件，先简单记录一下_14737809831466499882746641449-优快云博客

本文详细介绍了如何使用Multipart形式通过POST方法将文本和图片数据上传至指定URL，包括请求头设置、参数拼接及响应结果解析。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

-(void)uploadField{
    NSString *boundary = @"---------------------------14737809831466499882746641449";
    NSURL *requestURL = [NSURL URLWithString:@"http://127.0.0.1:8000/test/"];
	// create request
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
    [request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];
    [request setHTTPShouldHandleCookies:NO];
    [request setTimeoutInterval:30];
    [request setHTTPMethod:@"POST"];
    
    // set Content-Type in HTTP header
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
    [request setValue:contentType forHTTPHeaderField: @"Content-Type"];
    
    // post body
    NSMutableData *body = [NSMutableData data];
    
    // add text data
    NSString *param1 = @"rnmknm";
    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"username\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:param1] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
    
    // add image data
    NSData *imageData = UIImagePNGRepresentation([UIImage imageNamed:@"blue.png"]);
    if (imageData) {
        [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"blue.png\"\r\n", @"docfile"] dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:[@"Content-Type: image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
        [body appendData:imageData];
        [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    }
    
    [body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    
    // setting the body of the post to the reqeust
    
    [request setHTTPBody:body];
    
    // set the content-length
    NSString *postLength = [NSString stringWithFormat:@"%d", [body length]];
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
    
    // set URL
    [request setURL:requestURL];
    
    NSHTTPURLResponse *urlResponse = nil;
    NSError *error;
    NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&error];
    NSString *result = [[NSString alloc]initWithData:responseData encoding:NSUTF8StringEncoding];
    
    NSLog(@"%@",result);
}