Jay Versluis There’s a handy function called arrayWithArray that we can use: NSMutableArray *myNewArray = [[NSMutableArray alloc]init]; myNewArray = [NSMutableArray arrayWithArray:myOldArray]; Likewise we can convert a mutable array into a standard one: NSArray *myStandardArray = [[NSArray alloc]init]; myStandardArray = [NSArray arrayWithArray:myMutableArray];
You can set the title of a button depending on its control state. An unselected untoched button has a UIControlStateNormal, but Xcode will show you all the other options you have at your fingertips. To access this property you need to create an IBOutlet on the button. If you also want the button to trigger […]
I keep forgetting how to do this so here it is: if you have an integer and you want to print it out, say in a UILabel you can use the initWithFormat method of NSString like so: NSString *myNumber; myNumber = [[NSString alloc] initWithFormat:@”%d”, myInteger]; self.myLabel.text = myNumber; The secret here is the @”%d” which […]
The Root Navigation Controller can serve as a data model. Each View Controller connected to the Navigation Controller via push segue can access its properties like so: ((MyNavController *)self.parentViewController).mySourceProperty Here’s an example. MyNavController is the class for the Navigation Controller. This snipped is called from any View Controller in sequence and assumes we have an […]
Once you’ve connected two View Controllers via a Segue in the storyboard you need to give it an identifier so we can call it in code like so: [self performSegueWithIdentifier:@”showDetail” sender:self]; Dismiss it via an action like this: [self dismissViewControllerAnimated:YES completion:nil];
Everything has to be that bit more complicated with iOS doesn’t it?
Done with only one line of code:
AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
You need to import the AudioToolbox Framework and import it in your header file for this to work.
Just like playing a standard sound file, you can also choose to play an alert. The difference is that this will make the iPhone vibrate if it’s set to silent. The code is nearly identical to the standard sound file with the exception of the very last line of code: SystemSoundID soundID; NSString *soundFile = […]