Is NSTimer expected to fire when app is backgrounded?
I don't understand it at all but NSTimer in my app definitely is running in background. I have a NSLog in method run by the timer and it is logging while it's in background. It's on iPhone 4 with iOS 4.2.1. I have declared location background support in Info.plist. I read the docs and many discussions here and elsewhere and it shouldn't be possible. Is it an iOS bug? Or undocumented feature? I don
iphone - NSTimers in background
Im developing an app that has to run in the background. It's a location based app, so it runs all the time, the OS doesn't kill it. It should send some info every 10 secs(just for debugging), I set a timer once its in the background. I set a breakpoint in the function that should be executed every 10 secs, which is never called, but if I pause the app and then continue the timer is called, and the
How do I make my App run an NSTimer in the background?
I'm making a benchmark App for test purposes ONLY. I am not intending this to go to the App Store. What I need is my NSTimer to continue running on the background using a UIBackgroundTaskIdentifier, save data to a Core Data db and finally push the data to a server (I'm using Parse), after a certain time interval, of course. So basically, I haven´t found any questions which apply to my specific cas
How do I get a background location update every n minutes in my iOS application?
I'm looking for a way to get a background location update every n minutes in my iOS application. I'm using iOS 4.3 and the solution should work for non-jailbroken iPhones. I tried / considered following options: CLLocationManager startUpdatingLocation/startMonitoringSignificantLocationChanges: This works in the background as expected, based on the configured properties, but it seems not possible t
How to change the background color of a UIButton while it's highlighted?
At some point in my app I have a highlighted UIButton (for example when a user has his finger on the button) and I need to change the background color while the button is highlighted (so while the finger of the user is still on the button). I tried the following: _button.backgroundColor = [UIColor redColor]; But it is not working. The color remains the same. I tried the same piece of code when the
How can I change the color of pagination dots of UIPageControl?
UPDATE: This answer is 6 years old and very outdated, but it's still attracting votes and comments. Ever since iOS 6.0 you should be using the pageIndicatorTintColor and currentPageIndicatorTintColor properties on UIPageControl. ORIGINAL ANSWER: I ran into this problem today and decided to write my own simple replacement class. It's a sublassed UIView that uses Core Graphics to render the dots in
Set line height in UITextView
After iOS 7, the styleString approach no longer works. Two new alternatives are available. Firstly, TextKit; a powerful new layout engine. To change line spacing, set the UITextView's layout manager's delegate: textView.layoutManager.delegate = self; // you'll need to declare you implement the NSLayoutManagerDelegate protocol Then override this delegate method: - (CGFloat)layoutManager:(NSLayoutMa
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