I am writing my first iPhone app. I'm looking for direction on how to best accomplish an image zoom animation. I have a thumbnail sized image on the screen, and want to show a larger sized image overlaid on the view when the user taps on the thumbnail.
I've seen some suggestions for using the core animation framework. I saw another suggestion to use ImageKit. Is ImageKit available on iPhone, or just OSX?
Again, I'm just getting started, and looking for some guidance.
ImageKit is not available on iPhoneOS, so you have to use CoreAnimation from these choices.
Or you could try to use UIView animation blocks, which is much simpler (but limited compared with CA).
Related
I'm diving into iOS development and I'm building a simple timeline app using a static timeline image that I already have. The timeline image won't fit on the screen. The width of the image is about five times the width of the iPad screen, so I have to allow the user to scroll the image horizontally. Here's a mockup...
For each item on the timeline, the user can tap it to receive a description at the bottom of the screen. My questions are...
I was planning to use a UIScrollView with a PageControl at the bottom. Can a UIScrollView hold a single view that holds the entire timeline image or do I have to break the the timeline image up into multiple views?
Are there any performance issues I need to consider when implementing this with a UIScrollView, using a static image?
Are there other approaches to implementing this scrollable timeline that I should consider other than using a UIScrollView?
Thanks so much in advance for your wisdom!
Yes, you'll need a UIScrollView. However, you could use a CATiledLayer to make it perform well. You would just need to pre-tile your static image. Try out the ShutterStock app in the app store (it's free). They have a really nicely done horizontal scrolling implementation that I believe uses a CATiledLayer (though I'm not completely sure).
I did a tutorial on using the CATiledLayer a while back. You can check it out here: http://www.cimgf.com/2011/03/01/subduing-catiledlayer/
If you are going to support iOS 6 and up only, you could look into using a UICollectionView which is very efficient. It works similarly to a UITableView with the cell re-use pattern, but allows you to have horizontal scrolling like you're looking for.
As I am very new to the lua language I am having a question here.
How can I slide the images forward and backward with in the container smoothly like in Iphone.
Is there any reference or sample code available for that? Also I want to know how can we perform auto scrolling in lua language.
I tried the sample of slides in corona sdk but it is not smooth like iphone.
Thank you,
Monish Calapatapu.
You can easily slide images around using the transition commands:
http://developer.anscamobile.com/reference/index/transitionto
http://developer.anscamobile.com/reference/index/transitionfrom
Scrolling is pretty much just a special case of sliding images, where the images happen to be text.
I'm writing an iPhone App that allows people to share images that may be copyrighted(not illegally). The issue I am having is that I'm looking for a way to work around the screen capturing. Is there any possible way you can disable screen capturing or possibly distort the image in some way so capturing will be useless, maybe even block the images when a screen capture is trying to be taken?
That is impossible because it is embedded in iOS itself. Maybe some private APIs, but then there is no app store for your app.
Watermarking the images may be a good half-way solution.
iOS screen capture does not support capturing everything. It does not capture OpenGL or YouTube for example. So if you can manage to implement showing images using OpenGL instead of the simple way using UIKit they would not show up on a screen shot.
Disclaimer: I know the question of locking orientation has been asked, and solved. But that's only half my question.
I'm building an iphone website for a small indie game developer. They want to be able to show off screenshots from some of their iphone games. This is somewhat of a problem though. All the screenshots are taken from the game in landscape mode, so it really doesn't make any sense to display them in landscape.
Currently I have a very lightweight lightbox-style display for the image. You click a button on the site, and the image pops up (through ajax magic!) to occupy the full screen. Clicking anywhere on the image makes it go away, as if you had never viewed it.
I'm thinking that the two most practical solutions are either: a) lock iphone orientation for the duration of displaying the image; or b) do some very sneaky rotation on the image when the phone rotates, so no one ever notices. Are either of these possible/feasible? If so, could you give me any tips? And if not, has anyone solved a similar problem?
A demo of this is available at my personal server.
My $.02
As a personal design decision - I would have two images, and switch them as the rotation changes from portrait to landscape. Locking orientation seems so unfriendly. As some extra eye candy, You may want to put some sort of transition image in there between image swaps.
Here is something that may help .. http://snippets.dzone.com/posts/show/4912
Hello all would anyone know how flickr manage to make this type of effect on their app where on the main screen you see a background image moving to the side and zooming in and fading to another image its really cool. your link sources for code or tutorials are always appreciated
thanks
PS im trying to implement this to one of my apps in iphone
See the Ken Burns Effect.