iphone - iphone上传图片

Question

我是 Iphone 开发的新手。我想将图像从 Iphone 库上传到服务器。我想在屏幕上点击一个按钮，通过点击按钮用户可以看到图像文件并选择一个用户想要的文件。选择文件后，我想在图像视图中显示图像。
怎么做。如何使用 ImageViewController？

谢谢，
阿维纳什·帕蒂尔。

Answer 1

使用 UIImagePickerController 及其委托方法，并在控制器的 .h 文件中实现 UIImagePickerControllerDelegate

只需为您的按钮单击编写此代码

-(IBAction)btnTapped:(id)sender
{
        UIImagePickerController *imgPicker = [[UIImagePickerController alloc] init];
        imgPicker.delegate = self;
        imgPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        [self presentModalViewController:imgPicker animated:YES];
} 

当您单击此按钮时，UIImagePickercontroller 将加载，选择您想要的任何图像，UIImagePickerController 的此委托方法将被调用

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    [picker dismissModalViewControllerAnimated:YES];
    [picker release];
    //This is selected image
    UIImage *img = [info objectForKey:UIImagePickerControllerOriginalImage];
    YOURIMAGEVIEW.image = img;
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    [picker dismissModalViewControllerAnimated:YES];
    [picker release];
}

现在搜索ASIHttpRequest如何将图像上传到网络服务器......尝试一些谷歌搜索......

Answer 2

首先，您必须获取用于以下代码的图像表单照片库。

                   - (IBAction)BrowseImage:(id)sender {

if ([UIImagePickerController isSourceTypeAvailable:
     UIImagePickerControllerSourceTypeSavedPhotosAlbum])
{
    UIImagePickerController *imagePicker =
    [[UIImagePickerController alloc] init];
    imagePicker.delegate = self;
    imagePicker.sourceType = 
    UIImagePickerControllerSourceTypePhotoLibrary;
    imagePicker.mediaTypes = [NSArray arrayWithObjects:
                              (NSString *) kUTTypeImage,
                              nil];
    imagePicker.allowsEditing = NO;
    [self presentModalViewController:imagePicker animated:YES];
    //newMedia = NO;

  }

  }
         -(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
         {
       [self dismissModalViewControllerAnimated:YES];

         }

选择图像后，您已使用 http post 方法将该图像发送到服务器

这是代码

                  NSString *urlString = @"your Url";
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([self scaleAndRotateImage:Mainimage.image],90);


[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
// [body appendData:[[NSString stringWithString:@"Content-Disposition: attachment; name=\"user_photo\"; filename=\"photoes.jpg\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"image\"; filename=\"%@.jpg\"\r\n",@"ImageNmae"] 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=\"title\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:ImageTitel.text] 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];