Have you looked at cocoa controls? I am pretty sure I have seen a few open source projects that do this. www.cocoacontrols.com <http://www.cocoacontrols.com/>
Thanks, Jon > On Feb 23, 2016, at 4:28 AM, Charles Jenkins <cejw...@gmail.com> wrote: > > Still struggling with this… My scrollview containing an imageview seems to > work just fine: I can scale and crop an image with no problem. But I’m having > difficulty getting the desired “crop circle” to hover over the scrollview > properly. When I add it to the main view (not the scrollview) at runtime, I > try using autolayout constraints to pin it to the left, top, right, and > bottom of the scrollview; but it always appears positioned elsewhere, as if > it’s not resizing due to the constraints. > > I viewDidLoad(), I create each constraint like this: > > let lc = NSLayoutConstraint( overlay, attribute: .Left, relatedBy: > .Equal, toItem: scrollView, attribute: .Left, multiplier: 1, constant: 0 ) > > And when all four have been created, I call > NSLayoutConstraint.activateConstraints( [ lc, tc, rc, bc ] ) > > Is this the wrong approach? What’s the right way to display a simple overlay > above the content of a scrollView? > > -- > > Charles > > On February 21, 2016 at 20:48:18, Charles Jenkins (cejw...@gmail.com) wrote: > > I’m trying to do something that’s so simple, conceptually, that I’m sure > there’s a demo program for it, if only I could find the right Google search > to locate it. > > I want to allow iOS users to select an image (either from the camera roll or > by taking a photo) and display it in a CIRCLE for cropping. Users should be > able to scale and position the image as they like to fit within the circle, > then tap a DONE button to have the image cropped and saved into my app’s > image store. > > I spent all day today screwing around making a view controller with a > scrollview containing an imageview, and I haven’t figured out how to make the > circle overlay correctly to fit over the scrollview. > > Does anybody know of a demo program that’ll show me how to do this? > > -- > > Charles > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/jhull%40gbis.com > > This email sent to jh...@gbis.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
