uiapplication

I'm not inventing the wheel. In iOS8, to open Settings from inside the app I'm using this code: BOOL canOpenSettings = (&UIApplicationOpenSettingsURLString != NULL); if (canOpenSettings) { NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString]; [[UIApplication sharedApplication] openURL:url]; } The code is in a lot of answers and questions in stackoverflow. The problem came out with Xcode 6.3, I've got a warning saying: Comparison of address of 'UIApplicationOpenSettingsURLString' not equal to a null pointer is always true What is interesting is that Apple is using it in their

whats the use of UIApplicationDidEnterBackgroundNotification in iPhone app or how we can take benifit from it This notification means the user "quit" your app on an iPhone 4 - It happens when a phone call or text message comes in and user accepts the interruption (answers/replies), or when the user has pressed the Home button. I found this link on SO that shows the interaction between all states, and the appropriate notifications: http://www.drobnik.com/touch/2010/07/understanding-ios-4-backgrounding-and-delegate-messaging/ To make use of this notification you can implement

I'm trying to launch google maps from my iPhone application. The launching part works fine but since the iPhone 3.1 update (i think it was around this time) I get a zoomed out map of the US and Canada rather than zoomed in on my current location. Everything worked fine originally but sometime around the update things stopped working correctly. Here is the string I've been using. This works on my partners phone with iOS 3.0 and our iPod with iOS 2.2.1 but on my phone with iOS 3.1 shows a zoomed out map of Canada and the US. NSString *name = @"clothing"; NSString *latlong = [[NSString alloc]

I need to check when my app launches if it was being updated, because i need to make a view that only appears when the app is firstly installed to appear again after being updated. tilo You could save a value (e.g. the current app version number) to NSUserDefaults and check it every time the user starts the app. - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // ... NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; NSString *currentAppVersion = [[NSBundle mainBundle] objectForInfoDictionaryKey:@

I'm writing my first iPhone application and I'm having trouble switching views. I have 2 views and a reference to each in the AppDelegate (an instance of UIApplicationDelegate ). I create instances of both in the applicationDidFinishLaunching and immediately show the first view. This works fine. The problem is the reference to the other view is in the AppDelegate and I can't figure out how to get a reference to it so I can switch to the other view. Is there a way to get a reference to the main UIApplication or UIApplicationDelegate objects? Louis Gerbarg Yes, UIApplication is a singleton, and