Iphone 目标C：如何使用HTTP POST上传图像和文本？

我已经成功地创建了两种不同的方法，每种方法都可以上传图像或文本。但是我在写一个可以同时发布文本和图像的方法时遇到了问题

//这是我的新方法，它对@sgosha的效果很好：

- (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);
}

//老问题: 显然这太简单了，不起作用！我在控制台中没有收到任何错误或任何东西，图像已上载，但文本未发送。有什么想法吗

顺便说一句：服务器端脚本是一个非常简单的php脚本。

试试这个（编辑）：

---

如果要命名图像，请执行以下操作：

 NSMutableString *nombreImagen= [[NSMutableString alloc]init];
    [nombreImagen appendString:@"Content-Disposition: attachment; name=\"file\"; filename=\""];
    [nombreImagen appendString:@"hoy"];
    [nombreImagen appendString:@".jpg\"\r\n"];
    .......

   [body appendData:[[NSString stringWithString:nombreImagen] dataUsingEncoding:NSUTF8StringEncoding]];

---

在同一篇文章中，我还想上传一张图片和其他数据，关于上传图片的大多数信息只是为了在一个服务器连接中单独上传一张图片，下面是我解决这个问题的方法

这是PHP

<?php
/* As you can see there are more values not only the image */
$variableOne    = $_POST['variableOne'];
$variableTwo    = $_POST['variableTwo'];
$variableThree  = $_POST['variableThree'];
$variableFour   = $_POST['variableFour'];
$variableFive   = $_POST['variableFive'];
$variableSix    = $_POST['variableSix'];
$variableSeven  = $_POST['variableSeven'];
$variableEight  = $_POST['variableEight'];
$variableNine   = $_POST['variableNine'];
$variableTen    = $_POST['variableTen'];

/* Our image */
$image = $_REQUEST['image'];

/* This is for trying to get a unique name for the image file, since maybe you want to store large amount of images */
$currentDate = date("Y-m-d");
$name  = "" . $currentDate . microtime() . rand(0, 999) . rand(0, 999) . rand(0, 999) . ".jpg";

/* 
 * Here comes the image stuff
 */
if (file_exists($name)) {
    echo "File already exists";
} else {
        /* Decoding image */
        $binary = base64_decode($image);

        /* Opening image */
        $file = fopen($name, 'wb');

        /* Writing to server */
        fwrite($file, $binary);

        /* Closing image file */
        fclose($file);

        echo "Added";
    }   
}   
?>

这是服务器连接代码

NSURL *sendURL = [NSURL URLWithString:@"http://yourdomainname/imagefolder/phpscript.php"];

NSMutableURLRequest *sendRequest = [NSMutableURLRequest requestWithURL:sendURL cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:30];

[sendRequest setHTTPMethod:@"POST"];

[sendRequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];

NSData *imageData = UIImageJPEGRepresentation(yourImage, 1.0);

NSString *encodedString = [[self base64forData:imageData] stringByReplacingOccurrencesOfString:@"+" withString:@"%2B"];

NSString *dataToSend = [[NSString alloc] initWithFormat:@"variableOne=%@&variableTwo=%@&variableThree=%@&variableFour=%@&variableFive=%@&variableSix=%@&variableSeven=%@&variableEight=%@&variableNine=%@&variableTen=%@&image=%@", valueOne, valueTwo, valueThree, valueFour, valueFive, valueSix, valueSeven, valueEight, valueNine, valueTen, encodedString];

[sendRequest setHTTPBody:[dataToSend dataUsingEncoding:NSUTF8StringEncoding]];

serverConnection = [[NSURLConnection alloc] initWithRequest:sendRequest delegate:self];

[serverConnection start];

设置服务器连接的委托方法

- (void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    returnData = [[NSMutableData alloc] init];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    [returnData appendData:data];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    if (connection == serverConnection) {
        NSString *responseString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

        NSLog(@"Response: %@", responseString);

        if ([responseString isEqualToString:@"Added"]) {

            /* Make something on success */

        } else {

            /* Make something else if not completed with success */

        }
    }
}

- (void) connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
    /* Make something on failure */
}

---

这段代码适用于使用POST请求的1个图像和7个其他参数

请确保更改变量名和值，以及图像参数名和“showPhoto”，这是我的IBMImageView对象 “name”显示URL参数名称

NSString*str=@； NSString*urlString=[NSString stringWithFormat:@“%@”，str]

---

“附件”是你在这里做的唯一编辑吗？如果是，我应该在哪里传递文本？这是否只是说明图像作为附件发送，然后我可以在setHTTPBody调用之前以代码的形式发送文本？Tnx，因为质量代码：D现在工作得很好，将使用我的方法更新原始帖子，现在工作得很好！谢谢你。真的很有帮助。完全被困在如何发送一个文本PARAM连同图像，请考虑更新使用<代码>内容处置：形式数据；字符集=UTF-8；name=…因为这将匹配编码

NSUTF8StringEncoding

。粘贴到表单创建中的非英语字符对于此解决方案为Posted的服务器不可用边界是什么？有人能解释一下吗？也许你可以用它来轻松地完成。截至2013年1月17日，请查看github上的库。这是在http和https上上载多部分/表单数据的最佳方式。它使用块。使代码干净漂亮。你可以分享php脚本吗？在这里找到答案伟大的例子…工作完美。也感谢PHP的一面！

@interface YourViewController : UIViewController {
    NSURLConnection *serverConnection;
    NSMutableData *returnData;
}

NSURL *sendURL = [NSURL URLWithString:@"http://yourdomainname/imagefolder/phpscript.php"];

NSMutableURLRequest *sendRequest = [NSMutableURLRequest requestWithURL:sendURL cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:30];

[sendRequest setHTTPMethod:@"POST"];

[sendRequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];

NSData *imageData = UIImageJPEGRepresentation(yourImage, 1.0);

NSString *encodedString = [[self base64forData:imageData] stringByReplacingOccurrencesOfString:@"+" withString:@"%2B"];

NSString *dataToSend = [[NSString alloc] initWithFormat:@"variableOne=%@&variableTwo=%@&variableThree=%@&variableFour=%@&variableFive=%@&variableSix=%@&variableSeven=%@&variableEight=%@&variableNine=%@&variableTen=%@&image=%@", valueOne, valueTwo, valueThree, valueFour, valueFive, valueSix, valueSeven, valueEight, valueNine, valueTen, encodedString];

[sendRequest setHTTPBody:[dataToSend dataUsingEncoding:NSUTF8StringEncoding]];

serverConnection = [[NSURLConnection alloc] initWithRequest:sendRequest delegate:self];

[serverConnection start];

- (void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    returnData = [[NSMutableData alloc] init];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    [returnData appendData:data];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    if (connection == serverConnection) {
        NSString *responseString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

        NSLog(@"Response: %@", responseString);

        if ([responseString isEqualToString:@"Added"]) {

            /* Make something on success */

        } else {

            /* Make something else if not completed with success */

        }
    }
}

- (void) connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
    /* Make something on failure */
}

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];
NSMutableData *body = [NSMutableData data];
NSString *boundary = @"---------------------------14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];

 NSData *imageData = UIImageJPEGRepresentation(_showPhoto.image, 90);

[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Disposition: form-data; name=\"host_pic\"; filename=\"parkN.jpg\"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:imageData];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

//  parameter username

[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userID\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

[body appendData:[@"17" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];


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

[body appendData:[@"50.0011" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

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

[body appendData:[@"50.0011" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

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

[body appendData:[@"lahore" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];


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

[body appendData:[@"lahore" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

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

[body appendData:[@"123456" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

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

[body appendData:[@"033333333" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];


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


// setting the body of the post to the reqeust
[request setHTTPBody:body];


NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
// NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSDictionary *dict=[NSJSONSerialization JSONObjectWithData:returnData options:NSJSONReadingMutableLeaves error:nil];
NSLog(@"%@",dict);