目标C：如何使用HTTP POST上传图片和文字？ [英] Objective C: How to upload image and text using HTTP POST?

问题描述

我已经成功创建了两种不同的方法，其中每个方法都可以上传图像或文本。但我有问题写一个方法，可以同时发布文本和图像！

//这是我的新方法女巫工作很好thanx到@sgosha：

   - （void）upload {
 NSString * urlString = @http://www.examplescript.com; 
 NSMutableURLRequest * request = [[[NSMutableURLRequest alloc] init] autorelease]; 
 [request setURL：[NSURL URLWithString：urlString]]; 
 [request setHTTPMethod：@POST]; 
 
 NSMutableData * body = [NSMutableData data]; 
 
 
 NSString * boundary = [NSString stringWithString：@--------------------------- 14737809831466499882746641449 ]; 
 NSString * contentType = [NSString stringWithFormat：@multipart / form-data; boundary =％@，boundary]; 
 [request addValue：contentType forHTTPHeaderField：@Content-Type]; 
 
 //文件
 NSData * imageData = UIImageJPEGRepresentation（imageView.image，90）; 
 
 [body appendData：[[NSString stringWithFormat：@ - ％@ \r\\\
，boundary] dataUsingEncoding：NSUTF8StringEncoding]]; 
 [body appendData：[[NSString stringWithString：@Content-Disposition：attachment; name = \userfile \; filename = \.jpg \\r\\\
] dataUsingEncoding ：NSUTF8StringEncoding]]; 
 [body appendData：[[NSString stringWithString：@Content-Type：application / octet-stream\r\\\
\r\\\
] dataUsingEncoding：NSUTF8StringEncoding]]; 
 [body appendData：[NSData dataWithData：imageData]]; 
 [body appendData：[[NSString stringWithString：@\r\\\
] dataUsingEncoding：NSUTF8StringEncoding]]; 
 
 //文本参数1 
 NSString * param1 = @parameter text; 
 [body appendData：[[NSString stringWithFormat：@ - ％@ \r\\\
，boundary] dataUsingEncoding：NSUTF8StringEncoding]]; 
 [body appendData：[[NSString stringWithFormat：@Content-Disposition：form-data; name = \parameter1 \\r\\\
\r\\\
] dataUsingEncoding：NSUTF8StringEncoding] ]。 
 [body appendData：[[NSString stringWithString：param1] dataUsingEncoding：NSUTF8StringEncoding]]; 
 [body appendData：[[NSString stringWithString：@\r\\\
] dataUsingEncoding：NSUTF8StringEncoding]]; 
 
 //另一个文本参数
 NSString * param2 = @Parameter 2 text; 
 [body appendData：[[NSString stringWithFormat：@ - ％@ \r\\\
，boundary] dataUsingEncoding：NSUTF8StringEncoding]]; 
 [body appendData：[[NSString stringWithFormat：@Content-Disposition：form-data; name = \parameter2 \\r\\\
\r\\\
] dataUsingEncoding：NSUTF8StringEncoding] ]。 
 [body appendData：[[NSString stringWithString：param2] dataUsingEncoding：NSUTF8StringEncoding]]; 
 [body appendData：[[NSString stringWithString：@\r\\\
] dataUsingEncoding：NSUTF8StringEncoding]]; 
 
 //关闭形式
 [body appendData：[[NSString stringWithFormat：@ - ％@  -  \r\\\
，boundary] dataUsingEncoding：NSUTF8StringEncoding]]; 
 
 //设置请求体
 [request setHTTPBody：body]; 
 
 //返回并测试
 NSData * returnData = [NSURLConnection sendSynchronousRequest：request returningResponse：nil error：nil]; 
 NSString * returnString = [[NSString alloc] initWithData：returnData encoding：NSUTF8StringEncoding]; 
 
 NSLog（@％@，returnString）; 
 
 
 
 
 
 $老问题
显然这太简单了，不行！我没有在控制台或任何东西中得到任何错误，图像上传，但文本不发送。任何想法？
 
  btw：服务器端脚本是一个非常简单的php脚本。
解决方案
试试这个（EDITED）：
 
 
  NSMutableData * body = [NSMutableData data]; 
 
 // file 
 [body appendData：[[NSString stringWithFormat：@ - ％@ \r\\\
，boundary] dataUsingEncoding：NSUTF8StringEncoding]]; 
 [body appendData：[[NSString stringWithString：@Content-Disposition：attachment; name = \userfile \; filename = \.jpg \\r\\\
] dataUsingEncoding ：NSUTF8StringEncoding]]; 
 [body appendData：[[NSString stringWithString：@Content-Type：application / octet-stream\r\\\
\r\\\
] dataUsingEncoding：NSUTF8StringEncoding]]; 
 [body appendData：[NSData dataWithData：imageData]]; 
 [body appendData：[[NSString stringWithString：@\r\\\
] dataUsingEncoding：NSUTF8StringEncoding]]; 
 
 // text参数
 [body appendData：[[NSString stringWithFormat：@ - ％@ \r\\\
，boundary] dataUsingEncoding：NSUTF8StringEncoding]]; 
 [body appendData：[[NSString stringWithFormat：@Content-Disposition：form-data; name = \parameter1 \\r\\\
\r\\\
] dataUsingEncoding：NSUTF8StringEncoding] ]。 
 [body appendData：[parameterValue1 dataUsingEncoding：NSUTF8StringEncoding]]; 
 [body appendData：[[NSString stringWithString：@\r\\\
] dataUsingEncoding：NSUTF8StringEncoding]]; 
 
 //另一个文本参数
 [body appendData：[[NSString stringWithFormat：@ - ％@ \r\\\
，boundary] dataUsingEncoding：NSUTF8StringEncoding]]; 
 [body appendData：[[NSString stringWithFormat：@Content-Disposition：form-data; name = \parameter2 \\r\\\
\r\\\
] dataUsingEncoding：NSUTF8StringEncoding] ]。 
 [body appendData：[parameterValue2 dataUsingEncoding：NSUTF8StringEncoding]]; 
 [body appendData：[[NSString stringWithString：@\r\\\
] dataUsingEncoding：NSUTF8StringEncoding]]; 
 
 //关闭形式
 [body appendData：[[NSString stringWithFormat：@ - ％@  -  \r\\\
，boundary] dataUsingEncoding：NSUTF8StringEncoding]]; 
 
 //设置请求体
 [request setHTTPBody：body];  
 
I've successfully created two different methods where each of them can upload either an image or text. But I am having problem writing a method that can post both text and image simultaneously!

// Here's my new method witch worked fine thanx to @sgosha:
- (void) upload {
    NSString *urlString = @"http://www.examplescript.com";
    NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
    [request setURL:[NSURL URLWithString:urlString]];
    [request setHTTPMethod:@"POST"];

    NSMutableData *body = [NSMutableData data];


    NSString *boundary = [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
    [request addValue:contentType forHTTPHeaderField:@"Content-Type"];

    // file
    NSData *imageData = UIImageJPEGRepresentation(imageView.image, 90);

    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:@"Content-Disposition: attachment; name=\"userfile\"; filename=\".jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[NSData dataWithData:imageData]];
    [body appendData:[[NSString stringWithString:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

    // Text parameter1
    NSString *param1 = @"parameter text";
    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"parameter1\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:param1] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

    // Another text parameter
    NSString *param2 = @"Parameter 2 text";
    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"parameter2\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:param2] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

    // close form
    [body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

    // set request body
    [request setHTTPBody:body];

    //return and test
    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

    NSLog(@"%@", returnString);
}
//Old question:
Obviously this was too easy and didn't work! I do not get any error in the console or anything, and the image is uploaded, but the text is not sent. Any ideas?

Btw: The server-side script is a very simple php script.
解决方案
Try this (EDITED):
NSMutableData *body = [NSMutableData data];

// file
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"Content-Disposition: attachment; name=\"userfile\"; filename=\".jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[[NSString stringWithString:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

// text parameter
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"parameter1\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[parameterValue1 dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

// another text parameter
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"parameter2\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[parameterValue2 dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

// close form
[body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

// set request body
[request setHTTPBody:body];


                        
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