What is the best way to create a numeric pad like the one Apple uses in the telephone app?
I would say just create an array of UIButton objects so that you can utilize UIControlStateSelected and the other button states by using different images for different states.
Another idea is to create something similar to that entire keypad in Photoshop, and then tile it into 12 images using http://www.mikelin.ca/blog/2010/06/iphone-splitting-image-into-tiles-for-faster-loading-with-imagemagick/
That would take some of the work out of get all the images to flow nicely together.
By the way, I just forgot about these until just a minute ago... they have some of the UI graphics from the iPhone and iPad in high res PSD file:
http://www.teehanlax.com/blog/2010/02/01/ipad-gui-psd/
and
http://www.teehanlax.com/blog/2010/08/12/iphone-4-gui-psd-retina-display/
and
http://www.teehanlax.com/blog/2010/06/14/iphone-gui-psd-v4/
I implemented a KeypadView, that is customizable via a delegate.
This github repository has the KeypadView and a delegate-implementation.
As I am still beginner in the field of iOS development I would appreciate, if you share your thoughts with me.
Related
I should able to capture multiple images (assume I am capturing passport for id proof) using iOS camera AVFoundation. I mean to say that I should have one interface to capture them one by one and merge them together. Is this possible in iOS, if yes is there any samples available for that.
Any help could be appreciated. Thank you
Can't completely get it. You can just take image from photostream one by one, you can take one photo and cut out 2 images, you can use imagepicker to call native camera, where is problem my friend?
I am building an app in which I have to highlight some countries dynamically in the world map.
In short I want to customize the whole view of ios maps as shown in the images.
can this be done using MapKit or is there any other method. Thanks in advance
You want to look into the Mapbox iOS SDK which will allow you to do this and more with a MapKit-like API. In particular, you will want to quickly make a custom map with TileMill using the provided Natural Earth data set for world country borders, enable UTFGrid interactivity so that the tapped regions can be identified, and use the RMShape class on an RMAnnotation onto the map view to add/color country polygons as needed. This sounds a little complex but the tools exist, are entirely free and open source, and I can help you with this process.
I've developed quite a few apps for iOS and am giving OSX apps a go. What would be the best approach to designing a UI like the split view on iPad apps? For a mac-based example, think of how the playlists work in iTunes. You select an option on the left, and a table view selects a different set of data based on what you selected.
Any ideas?
That sort of interface is known as a source list or source view. It's actually a special style applied to an outline view. Apple provides the SourceView sample code which illustrates the technique.
I'm basically trying to work out how to take a slice of an image, say a screenshot of an iPhone home screen, slice out the first icon and compare it to a set array of images in a library. Any help on where to start?
I'm no iPhone programmer, but I might be able to suggest a few things:
The SURF feature detection implemented in OpenCV should help you with this
There is a nice article on using OpenCV in Objective-C code.
A quick & dirty way might be to use the difference blend mode which should return the difference between the 1st image(top) and the 2nd image(bottom). If there is no difference the result will be completely black. So, the more black pixels in the difference result, potentially, the more similarities between the compared images.
I'm not an iOS developer, so I don't know if there is an image library that ships with sdk or if there's a free/opensource library for basic image processing. Still this should be trivial to implement:
e.g.
- (int)difference((int)topPixel,(int)bottomPixel)
{
return abs(topPixel-bottomPixel);
}
Note: Syntax might not be correct :)
HTH
This may not help you with taking a screenshot of the iOS home screen... But these articles show how to take snapshots from within a UIKit application:
https://developer.apple.com/library/prerelease/ios/#qa/qa1703/_index.html
https://developer.apple.com/library/prerelease/ios/#qa/qa1714/_index.html
Perhaps you would instruct the user to press home-power (buttons) to take a snapshot and store in the photo roll, then load that screenshot into an app to process the screenshot.
Hope this helps!
I'm just learning to use XCode and program in Objective-C (my plan is to write a an app we need for my business since I can't find one that does what I need). It's going well and as an exercise I've been playing with database apps and screensavers.
I'm trying to write a screensaver that all it does is to show 3 or 4 pictures randomly floating on the screen. Similar to the out of the box pictures screensaver that comes with Mac OS X.
I've played with the code in http://cocoadevcentral.com/articles/000088.php and while very informative I still don't know how to add those 3 or 4 pictures and make them move.
Anyone out there can point me to sample code? Or a project that I can use as reference?
Again, this is just self learning.
Thank you!
This will probably be your first port of call.
My approach to this was to create a Quartz Composition using Quartz composer. I found this easier than figuring out how to draw and animate everything by hand.
You can display a quartz composition inside a ScreensaverView by using the QCView class. This setup worked well for me.