Is OpenAL available on the iPhone?

Consider the following code: (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Set Background Color/Pattern self.window.backgroundColor = [UIColor blackColor]; self.tabBarController.tabBar.backgroundColor = [UIColor clearColor]; //self.window.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@'testbg.png']]; // Set StatusBar Color [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackTranslucent]; // Add the tab bar controller's current view as a subview of the window self.window.rootViewController = self.tabBarController; [self.window makeKeyAndVisible]; return YES; } How can the error be corrected that gets thrown in the console, 'Applications are expected to have a root view controller at the end of application launch'?

Which allows it to determine if an application is running on iPhone, or if it's running on an iPod Touch?

What is true about ARC and manual memory management?

What does the 'strong' property attribute do?

What gets returned if XIB is not properly connected to a parent controller?

What is the data type of extendStart parameter of function CGShadingCreateAxial of class CGShading?

What will you get from the default database? NSUserDefaults *defs = [NSUserDefaults standardUserDefaults]; NSArray *languages = [defs objectForKey:@'AppleLanguages']; NSString *preferredLang = [languages objectAtIndex:0];

Which symbol is used as a syntactic marker for blocks of code in iPhone OS 4.0?

Which need to be modified while localizing an application?

Which statement regarding Objective-C are correct?