用iPhone拍照，然後使用它！

Question

我有一個應用程序，需要一張照片，並把它放在圖像視圖。簡單。 代碼如下所示：

- (void)takePhoto:(id)sender 
{ 
    // Lazily allocate image picker controller 
    if (!imagePickerController) { 
     imagePickerController = [[UIImagePickerController alloc] init]; 

     // If our device has a camera, we want to take a picture, otherwise, we just pick from 
     // photo library 
     if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) 
     { 
      [imagePickerController setSourceType:UIImagePickerControllerSourceTypeCamera]; 
     }else 
     { 
      [imagePickerController setSourceType:UIImagePickerControllerSourceTypePhotoLibrary]; 
     } 

     // image picker needs a delegate so we can respond to its messages 
     [imagePickerController setDelegate:self]; 
    } 
    // Place image picker on the screen 
    [self presentModalViewController:imagePickerController animated:YES]; 
} 

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 
{ 
    UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage]; 

    image = [ImageHelpers imageWithImage:image scaledToSize:CGSizeMake(480, 640)]; 

    [imageView setImage:image]; 

    [self dismissModalViewControllerAnimated:YES]; 
} 

當我用相機膠捲一切都很正常，但如果我用實際攝像機的圖像視圖僅僅是黑色的。這是爲什麼？

在圖像視圖中使用它之前，是否需要將它保存到相機膠捲？

Answer 1

好的。我自己找到解決方案。

我只好先解僱模態視圖...

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 
{ 

    [self dismissModalViewControllerAnimated:YES]; //Do this first!! 
    UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage]; 

    image = [ImageHelpers imageWithImage:image scaledToSize:CGSizeMake(480, 640)]; 

    [imageView setImage:image]; 
} 

Answer 2

爲什麼你不能只使用該代碼？

- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo 
{ 
    [imageView setImage:image]; 
    [picker dismissModalViewControllerAnimated:YES]; 
    [picker release]; 
}