从照片库中获取照片不起作用答案

【问题标题】：Get a photo from photo library not working从照片库中获取照片不起作用
【发布时间】：2014-08-07 22:16:19
【问题描述】：

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 5MP (2592x1936)。但是，它返回的大小是 960x716。我错过了什么？

谢谢！

【问题讨论】：

设备（iPhone、iPad 等）上的图片在与 iTunes 同步时重新缩放。可能是你的情况......

标签： ios photo

【解决方案1】：

我找到了这个链接。您可以使用以下包含的代码来使用 Three20 框架。

这是你的solution。

【讨论】：

【解决方案2】：

UIImagePickerController 确实为您提供了完整的基于相机的图像。您需要从imagePickerController:didFinishPickingImage:editingInfo 方法的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);
}

【讨论】：