相关疑难解决方法(0)

我已经研究了足够的工作,但无法修复它.只要我将图像存储为UIImage,从相机拍照后,它就可以了,但只要我将此图像存储为PNG表示,它就会旋转90度.

以下是我的代码和我尝试过的所有事情:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 
{
    NSString *mediaType = [info valueForKey:UIImagePickerControllerMediaType];

    if([mediaType isEqualToString:(NSString*)kUTTypeImage]) 
    {
        AppDelegate *delegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
        delegate.originalPhoto  = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
        NSLog(@"Saving photo");
        [self saveImage];
        NSLog(@"Fixing orientation");
        delegate.fixOrientationPhoto  = [self fixOrientation:[UIImage imageWithContentsOfFile:[delegate filePath:imageName]]];      
        NSLog(@"Scaling photo");
        delegate.scaledAndRotatedPhoto  =  [self scaleAndRotateImage:[UIImage imageWithContentsOfFile:[delegate filePath:imageName]]];
    }
    [picker dismissModalViewControllerAnimated:YES];
    [picker release];
}


- (void)saveImage
{
    AppDelegate *delegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
    NSData *imageData = UIImagePNGRepresentation(delegate.originalPhoto);
    [imageData writeToFile:[delegate filePath:imageName] atomically:YES];
}

这里分别从这里和这里取得fixOrientation和scaleAndRotateImage函数.当我在UIImage上应用它们时,它们工作正常并旋转图像,但如果我将图像保存为PNG表示并应用它们则不起作用.

请执行以上功能后请参考以下图片:

我正在使用相机拍摄照片的Android应用程序.为了启动相机,我使用的intent ACTION_IMAGE_CAPTURE是这样的:

Intent camera = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        File image=new File(Environment.getExternalStorageDirectory(),"PhotoContest.jpg");
        camera.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(image));
        imageUri=Uri.fromFile(image);
        startActivityForResult(camera,1);

public void onActivityResult(int requestCode, int resultCode, Intent data){
    super.onActivityResult(requestCode, resultCode, data);
    switch(requestCode){
       case 1:
            if (resultCode == Activity.RESULT_OK) {
                  selectedImage = imageUri;
                  getContentResolver().notifyChange(selectedImage, null);
                  image= (ImageView) findViewById(R.id.imageview);
                  ContentResolver cr = getContentResolver();
                  Bitmap bitmap;
                  try {
                       bitmap = android.provider.MediaStore.Images.Media
                       .getBitmap(cr, selectedImage);
                       image.setImageBitmap(bitmap);
                       Toast.makeText(this, selectedImage.toString(),
                              Toast.LENGTH_LONG).show();
                  } catch (Exception e) {
                      Toast.makeText(this, "Failed to load", Toast.LENGTH_SHORT)
                              .show();
                      Log.e("Camera", e.toString());
                  }
                 }
             else 

         if(resultCode == Activity.RESULT_CANCELED) {
                    Toast.makeText(EditPhoto.this, …