R – how to get around lack of ‘add’ button in ABPeoplePickerNavigationController

addressbookcocoa-touchiphone

My app needs to associate instances of a custom class with contact records in the iPhone's AddressBook. Everything's all well and good when I present the ABPeoplePickerNavigationController and allow the user to pick an existing contact. Problem is there's no obvious way to allow a user to easily ADD a contact record if the one they're looking for doesn't already exist in their AddressBook.

How are people getting from ABPeoplePickerNavigationController to ABNewPersonViewController in a way that's easy & intuitive for the user?

Best Solution

You can create a UIBarButton and add it to the UINavigationBar of the ABPeoplePickerNavigationController like so.

    peoplePicker.topViewController.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addPerson:)];

-(IBAction)addPerson:(id)sender{
    ABNewPersonViewController *view = [[ABNewPersonViewController alloc] init];
    view.newPersonViewDelegate = self;
    UINavigationController *nc = [[UINavigationController alloc] initWithRootViewController:view];
    [self.picker presentModalViewController:nc animated:YES];
}

The issue that i came up against was that the ABPeoplePickerNavigationController has a cancel button placed in the rightBarButtonItem slot and I had to update the navigation bar on the

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated{

I have documented the entire process on my blog with a worked example that should allow you to create a contacts style application similar to that on the iPhone. Hope this helps.

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Ios – How to add multi-line text to a UIButton

For iOS 6 and above, use the following to allow multiple lines:

button.titleLabel.lineBreakMode = NSLineBreakByWordWrapping;
// you probably want to center it
button.titleLabel.textAlignment = NSTextAlignmentCenter; // if you want to 
[button setTitle: @"Line1\nLine2" forState: UIControlStateNormal];

For iOS 5 and below use the following to allow multiple lines:

button.titleLabel.lineBreakMode = UILineBreakModeWordWrap;
// you probably want to center it
button.titleLabel.textAlignment = UITextAlignmentCenter;
[button setTitle: @"Line1\nLine2" forState: UIControlStateNormal];

2017, for iOS9 forward,

generally, just do these two things:

choose "Attributed Text"
on the "Line Break" popup select "Word Wrap"

Ios – How to get the screen width and height in iOS

How can one get the dimensions of the screen in iOS?

The problem with the code that you posted is that you're counting on the view size to match that of the screen, and as you've seen that's not always the case. If you need the screen size, you should look at the object that represents the screen itself, like this:

CGRect screenRect = [[UIScreen mainScreen] bounds];
CGFloat screenWidth = screenRect.size.width;
CGFloat screenHeight = screenRect.size.height;

Update for split view: In comments, Dmitry asked:

How can I get the size of the screen in the split view?

The code given above reports the size of the screen, even in split screen mode. When you use split screen mode, your app's window changes. If the code above doesn't give you the information you expect, then like the OP, you're looking at the wrong object. In this case, though, you should look at the window instead of the screen, like this:

CGRect windowRect = self.view.window.frame;
CGFloat windowWidth = windowRect.size.width;
CGFloat windowHeight = windowRect.size.height;

Swift 4.2

let screenRect = UIScreen.main.bounds
let screenWidth = screenRect.size.width
let screenHeight = screenRect.size.height

// split screen            
let windowRect = self.view.window?.frame
let windowWidth = windowRect?.size.width
let windowHeight = windowRect?.size.height

Best Solution

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Ios – How to add multi-line text to a UIButton

Ios – How to get the screen width and height in iOS

Swift 4.2

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