Modifying UIImage with a subview [duplicate]

Question

This question already has an answer here:

Able to capture UIImage as-is based on content mode from UIimageView? (1 answer)

Closed 9 years ago.

If I have a UIImage displayed as a UIImageView and I let the user make some modifications to the image (such as adding a caption), how can I capture this new picture and send it to a server? If I added the UILabel as a subview of UIImageView and then took UIImageView.image, would this work?

Answer 1

If you are using iOS 7, you can follow this link:

http://blog.xamarin.com/snapshotting-views-in-ios-7/

Which talks about methods like

DrawViewHierarchy – Renders a view hierarchy snapshot.
SnapshotView – Renders a snapshot of a view to a new view.
ResizableSnapshotView – Renders a snapshot of a view to a new view with resizeable insets.

Basically, you add the caption as a SUB View of the image view and then use one of those methods.

OR

if you want to support any ios, you have to draw the contents of the views to a new imagecontext similar to this:

How to create an image from a UIView / UIScrollView

The difference is that you will render both, the image view's layer AND the label's layer too into the same context.

The server part is a different question.