Question: Using Visual Studio 2015
ASP.NET Core application uses class library
ASP.NET Core application and class library had .NET Framework 4.5.2 platform when projects were creating
Class library have .NETStandard Library 1.6.0 dependency
Will this application launch on .NET Core target runtime or it will require full .NET Framework?

Here is some snapshots

[solution explorer of .net core class library](https://i.stack.imgur.com/hTHJu.png)

[project.json of .net core class library](https://i.stack.imgur.com/mmVgq.png)

Answer: 
You can use default controls to achieve image cropping.

```
self.imgPicker.allowsEditing = true

```

Delegate Method 

```
//MARK: image picker delegate method
    //MARK:
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {

        var image : UIImage!

        if let img = info[UIImagePickerControllerEditedImage] as? UIImage
        {
            image = img

        }
        else if let img = info[UIImagePickerControllerOriginalImage] as? UIImage
        {
            image = img
        }

        picker.dismiss(animated: true,completion: nil)
 }

```
```
- (void)cropViewController:(TOCropViewController *)cropViewController didCropToImage:(UIImage *)image withRect:(CGRect)cropRect angle:(NSInteger)angle

```

{

```
[[NSUserDefaults standardUserDefaults] setObject:UIImageJPEGRepresentation(image, 1) forKey:@"image"];
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"cameraOn"];

[cropViewController dismissViewControllerAnimated:YES completion:^{

    [self performSegueWithIdentifier:@"YourSegueIdentifier" sender:self];

}];
//UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);

```

}

For (iOS13): Do all ViewController "cropController.modalPresentationStyle =.fullScreen" using storyboard or code.

This is work good and easily navigate to another controller. I also attached image so you can easily understand how to change presentation style. 

[![storyboard images](https://i.stack.imgur.com/kggx0.png)](https://i.stack.imgur.com/kggx0.png)