2
私はカメラや写真ライブラリから画像を選択できるアプリを持っています。次に、そのイメージをImageViewに配置します。私はQuartzを使用してその画像ビューから画像を取得し、いくつかの基本的なオーバーレイなどと一緒にレンダリングします。imagePickerControllerから選択したクォーツストレッチ画像
問題は、画像がカメラまたはカメラロールからピックされるとき、Quartzが90度回転させ、画像を垂直方向に伸ばします。 フォトライブラリから他の写真を選択しても問題はありません。また、allowsImageEditingがYESに設定されている場合は問題は発生しません。
誰かが光を当てることができれば、それは参考になるだろう、私はこれで相対的な初心者です。
私CameraViewController内のコード
#pragma mark -
- (IBAction)getCameraPicture {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.navigationBar.barStyle = UIBarStyleBlackOpaque;
picker.delegate = self;
picker.allowsImageEditing = NO; //seems to fix the weird rotation & stretching issues if set to YES
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentModalViewController:picker animated:YES];
//[picker release];
}
- (IBAction)selectExistingPicture {
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.navigationBar.barStyle = UIBarStyleBlackOpaque;
picker.delegate = self;
picker.allowsImageEditing = NO; //seems to fix the weird rotation & stretching issues if set to YES (only with camera roll)
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:picker animated:YES];
//[picker release];
}
}
#pragma mark -
- (void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingImage:(UIImage *)image
editingInfo:(NSDictionary *)editingInfo {
imageView.image = image;
NSLog(@"imagePicker image size %.0f x %.0f", image.size.width, image.size.height);
[picker dismissModalViewControllerAnimated:YES];
[picker release];
[quartzContextView setNeedsDisplay];
[self setUpAndRenderImage];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[picker dismissModalViewControllerAnimated:YES];
[picker release];
}
コードクォーツ
NSLog(@"Quartz image size %.0f x %.0f", drawImageTwo.size.width, drawImageTwo.size.height);
if (drawImageTwo.size.width >= drawImageTwo.size.height)
{
scaleFactor = (insideHeight+5)/drawImageTwo.size.height;
xOffset = (drawImageTwo.size.width*scaleFactor - insideWidth)/2;
yOffset = 0;
NSLog(@"Image is Landscaepe");
}
else if (drawImageTwo.size.width < drawImageTwo.size.height)
{
scaleFactor = (insideWidth+5)/drawImageTwo.size.width;
yOffset = (drawImageTwo.size.height*scaleFactor - insideHeight)/2;
xOffset = 0;
NSLog(@"Image is Portrait");
}
//draw Photo Base
CGRect baseRect = CGRectMake(0.0, 0.0, width, height);
CGContextDrawImage (context, baseRect, drawImage.CGImage);
//clip all further drawing to context clip
CGContextClipToRect(context, CGRectMake(leftOffset, (height-insideHeight-topOffset), insideWidth, insideHeight));
//draw Photo
CGRect photoRect = CGRectMake(leftOffset-xOffset, (height-insideHeight-topOffset)-yOffset, drawImageTwo.size.width*scaleFactor, drawImageTwo.size.height*scaleFactor);
CGContextDrawImage (context, photoRect, drawImageTwo.CGImage);