Xcode - 使用 PHP 将图像从 Iphone Simulator 上传到本地文件夹

Question

我正在关注此人的tutorial，了解如何将图像从 Xcode 上传到我计算机上的本地文件夹。

当我编译并运行代码时，一切都很好，我没有收到任何错误，但图像不在它应该在的文件夹中。

程序应该如何工作的简要总结：

1. 用户使用 UIImagePicker 从他们的照片库中选择一张图片

2. UIImageview 使用用户选择的 UIImage 进行更新

3. 用户按下调用 IBAction“uploadImage”的“上传”按钮

4. uploadImage 函数会将 UIImage 转换为 NSData 并将其发送到 PHP

5. PHP 会将图片上传到所选文件夹

IBAction“uploadImage”的代码

-(IBAction)uploadImage{

//this is the url where the PHP file is located
NSString *urlString = @"http://localhost/~andy/uploadimage.php";

//Convert selected UIImage to NSData
NSData *imageData = UIImageJPEGRepresentation(chosenImage,.3);

if (imageData != nil)
{
    NSString *filenames = [NSString stringWithFormat:@"imageUploaded"];      

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
    [request setURL:[NSURL URLWithString:urlString]];
    [request setHTTPMethod:@"POST"];

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

    NSMutableData *body = [NSMutableData data];

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

    //I use a method called randomStringWithLength: to create a unique name for the file, so when all the aapps are sending files to the server, none of them will have the same name:
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@.jpg\"\r\n",[self randomStringWithLength:10]] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[NSData dataWithData:imageData]];
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

    [request setHTTPBody:body];

    NSOperationQueue *queue = [[NSOperationQueue alloc] init];

    //Run code async 
    [NSURLConnection sendAsynchronousRequest:request queue:queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *error)
     {
         NSData *returnData = data;
         NSLog(@"data recieved!%@", returnData);

         //Do what you want with your return data.   
     }];
}
}

这是uploadimage.php的php代码：

<?php

$target_path = "/";  //where I want the uploaded images to go
$target_path = $target_path . basename( $_FILES['userfile']['name'] );

if(move_uploaded_file($_FILES['userfile']['tmp_name'], $target_path)) {

    echo "Image uploaded";
} 
else {

    echo "Upload Failed";
}
?>

我想要存储图片的目录是本地本地目录uploadimagep.php所在的localhost/~andy/

运行程序后的结果

一切都返回成功，但我的 localhost/~andy/ 文件夹中没有图像

有谁知道我做错了什么？我觉得我在某个地方犯了一个菜鸟错误。

提前致谢！

Answer 1

这是一个例子：

#define DataDownloaderRunMode @"myapp.run_mode" 
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url 
                               cachePolicy:NSURLRequestUseProtocolCachePolicy 
                               timeoutInterval:60]; 
[request setHTTPMethod:@"POST"]; 
// We need to add a header field named Content-Type with a value that tells that it's a form and also add a boundary.
// I just picked a boundary by using one from a previous trace, you can just copy/paste from the traces.
NSString *boundary = @"----WebKitFormBoundarycC4YiaUFwM44F6rT";

NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
[request addValue:contentType forHTTPHeaderField: @"Content-Type"];
// end of what we've added to the header
// the body of the post
NSMutableData *body = [NSMutableData data];
// Now we need to append the different data 'segments'. We first start by adding the boundary.
[body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

// Now append the image
// Note that the name of the form field is exactly the same as in the trace ('attachment[file]' in my case)!
// You can choose whatever filename you want.
[body appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"attachment[file]\";
filename=\"picture.png\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
// We now need to tell the receiver what content type we have
// In my case it's a png image. If you have a jpg, set it to 'image/jpg'
[body appendData:[[NSString stringWithString:@"Content-Type: image/png\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
// Now we append the actual image data
[body appendData:[NSData dataWithData:imageData]];
// and again the delimiting boundary    
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];

// adding the body we've created to the request
[request setHTTPBody:body];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request 
                                                       delegate:self 
                                                       startImmediately:NO]; 
[connection scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:DataDownloaderRunMode]; 
[connection start];