Question

我是XCode的新手，我想从照片库中选择一张照片。

- (void) ChoosePhoto_from_Album
{
    UIImagePickerController *imgage_picker = [[UIImagePickerController alloc] init];
    imgage_picker.delegate = self;
    imgage_picker.allowsEditing = YES;
    imgage_picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    [self presentViewController:imgage_picker animated:YES completion:NULL];
}

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

      NSLog(@"ImagePicker image size = (%.0f x %.0f)", image.size.width , image.size.height);
      // process image...
}

我选择的照片是500万像素（2592x1936）。但是，它返回的大小是960x716。我缺少什么？

谢谢！

Answer 1

我找到了这个链接。您可以使用以下包含代码来使用Three20 Framework。

这是您的solution。

Answer 2

UIImagePickerController会为您提供完整的基于相机的图像。您需要从editingInfo方法的imagePickerController:didFinishPickingImage:editingInfo参数中获取它。

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo {
 CGImageRef ref = image.CGImage;
 int width = CGImageGetWidth(ref);
 int height = CGImageGetHeight(ref);
 NSLog(@"image size = %d x %d", width, height);

 UIImage *orig = [editingInfo objectForKey:UIImagePickerControllerOriginalImage];
 ref = orig.CGImage;
 width = CGImageGetWidth(ref);
 height = CGImageGetHeight(ref);
 NSLog(@"orig image size = %d x %d", width, height);

 CGRect origRect;
 [[editingInfo objectForKey:UIImagePickerControllerCropRect] getValue:&origRect];

 NSLog(@"Crop rect = %f %f %f %f", origRect.origin.x, origRect.origin.y, origRect.size.width, origRect.size.height);
}

从照片库中获取照片不起作用

2 个答案: