I want to take an image and invert the colors in iOS.

I have an app that runs in the background (location services). When the app is in the foreground it vibrates fine when I want it to, however, if its not in the foreground (in the multitasking view)...

I have an UIImage and want to shift it's saturation about +10%. Are there standard methods or functions that can be used for this?

After struggling a few days trying to get something to work and getting no where, I was wondering if someone has gotten iOS Receipt Validation working on Node.js. I have tried the node module iap_v...

I am creating a table view in which there are 10 sections, all having a header view but no cells. So, in short, my table view will display 10 header views only; there will be no cells in any sectio...

I've encountered a problem where my iPhone Simulator can't access any of the websites on SAFARI. I am also unable to call any API from my application. The error shown by SAFARI is either of the tw...

I have this: float xExponential = pow(xPingPong, 5); And is not working, claiming: ERROR: 0:53: No matching overload for call to function 'pow' Am I doin' something wrong? Developing for i...

Apple maps can open routing apps when it can't provide a route: I want to open a few of those apps from my app. I am aware that I have to whitelist each app that I want to open. This is not the ...

I read a very interesting blog about implementing some anti-piracy protection into your apps. Some of them dont work anymore, some of them do. The 2 ones that still are effective to an extent are t...

I've been playing around with/debugging/disassembling binaries on the iPhone. The first obstacle is that the binaries are encrypted and dissembler can not read them. This can be overcome by dumpin...

I'm trying to show in a WkWebView an html page that I previously downloaded and stored in a String. This is how I setup my WkWebView: webView = WKWebView(frame: self.blankView.frame) webView.na...

I want to show 2 options like "hi" & "bye" when user completes selection on UIWebView. I have added observer to my view controller as follows. But I don't know further implementation. [[UIMen...

Is there any way to distribute ios applications through my own website, not using app store? I mean is there any way that enables end users to download the .ipa file from my website with their brow...

I want to catch event when user finish change selection in UITextView. Method textViewDidChangeSelection: call a few times while user pulls cursor. I try to use touchesEnded:withEvent:, but it does...

Getting error ‘Couldn’t install app. The profile can’t be installed. Try again.’ On new builds in TestFlight. The previous versions worked fine. After the new build upload to TestFlight, neit...

Is it possible to download a shared app group container with XCode similar to how the sandboxed container is downloaded for a particular app? I haven't been able to find any definitive Apple docume...

How do you calculate the focusPointOfInterest (a CGPoint value between 0,0 and 1,1) for an given AVCaptureDevice? I've been following the code samples from the latest WWDC but I really don't under...

Is it possible to select all input text on iphone device when focus / click? Typically for a browser environment one would use: $('input').bind('click focus', function() { $(this).select(); }); T...

A UIViewController adds itself to the default center: [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(editFood) name:@"editFood" object:nil]; Then a UITableView del...

I've noticed that if I use MKMapView's selectAnnotation:animated:, that it will scroll my map off screen if the MKAnnotation is not displayed in the current MKCoordinateRegion that my map is displa...

What is the best way to get round corners on an entire UITableView as seen in Stocks and Spotlight? The grouped style doesn't solve the problem because the round corners scroll away with the cell. ...

I'm not getting any location callbacks on either sim or device. I've got this code being called: - (void)startLocationCallbacks: (NSObject*) ignore { locationManager.delegate = self; locationMan...

I want to get the current location, but instead I get an error. This is a snippet of my view controller. - (void)viewDidLoad { self.locationManager = [[CLLocationManager alloc] init]; [location...

I want to check device id for my iPhone simulator application. But not using codebase. I know the way how to do with codebase, using UIDevice instance. Is there any way to find device id without u...

what is wrong with this? I really don't understand some important parts for UIImagePickerController.... here's the source: UIImagePickerController *imagePickerController = [[UIImagePickerControl...