Storyboards Tutorial in iOS 7: Part 2

原文 http://www.raywenderlich.com/50310/storyboards-tutorial-in-ios-7-part-2

Note from Ray:

If you want to learn about storyboarding, you’ve come to the right place!

In the ​​first part of the storyboards tutorial series​​, you covered the basics of using Interface Builder to create and connect various view controllers, along with how to make custom table view cells directly from the storyboard editor.

In this second and final part of the tutorial series, we’ll cover segues, static table view cells, the Add Player screen, and a game picker screen!

We’ll start where we left off last tutorial, so open your project from last time, or go through the ​​previous tutorial​​ first.

OK, let’s dive into some of the other cool features in Storyboarding!

Introducing Segues

It’s time to add more view controllers to the storyboard. You’re going to create a screen that allows users to add new players to the app.

Open up Main.storyboard and drag a Bar Button Item into the right slot of the navigation bar on the Players screen. In the Attributes inspector change its Identifier to Add to make it a standard +

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When the user taps this button the app pops up a new modal screen for entering the details of a new player.

Drag a new Navigation Controller

Here’s the trick: Select the + button that you just added on the Players screen and ctrl-drag

​​​​

Release the mouse button and a small popup menu shows up:

​​​​

Choose modal. This places a new arrow between the Players screen and the Navigation Controller:

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This type of connection is known as a segue

The cool thing about using segues is that you no longer have to write any code to present the new screen, nor do you have to hook up your buttons to IBActions. What you just did, dragging from the Bar Button Item to the next screen, is enough to create the transition. (Note: If your control already had an IBActionconnection, then the segue overrides that.)

Run the app and press the + button. A new table view will slide up the screen.

​​​​

This is a so-called “modal” segue. The new screen completely obscures the previous one. The user cannot interact with the underlying screen until they close the modal screen first. Later on you’ll also see “push” segues that push new screens on the navigation stack of a Navigation Controller.

The new screen isn’t very useful yet — you can’t even close it to go back to the main screen. That’s because segues only go one way, from the Players screen to this new one. To go back, you have to use thedelegate pattern. For that, you first have to give this new scene its own class.

Add a new file to the project and name it PlayerDetailsViewController, subclass of​​UITableViewController​​. To hook this new class up to the storyboard, switch back to Main.storyboardand select the new Table View Controller scene (the one that says “Root View Controller”). In the Identity inspector set its Class to PlayerDetailsViewController. I always forget this very important step, so to make sure you don’t, I’ll keep pointing it out.

While you’re there, change the title of the screen to Add Player (by double-clicking in the navigation bar). Also add two Bar Button Items to the navigation bar. In the Attributes inspector, set the Identifier of the button to the left to Cancel, and the one on the right to Done (also change this one’s Style from Bordered to Done).

​​​​

Then change PlayerDetailsViewController.h

@class PlayerDetailsViewController;
 
@protocol PlayerDetailsViewControllerDelegate <NSObject>
- (void)playerDetailsViewControllerDidCancel:(PlayerDetailsViewController *)controller;
- (void)playerDetailsViewControllerDidSave:(PlayerDetailsViewController *)controller;
@end
 
@interface PlayerDetailsViewController : UITableViewController
 
@property (nonatomic, weak) id <PlayerDetailsViewControllerDelegate> delegate;
 
- (IBAction)cancel:(id)sender;
- (IBAction)done:(id)sender;
 
@end

This defines a new delegate protocol that you’ll use to communicate back from the Add Player screen to the main Players screen when the user taps Cancel or Done.

Switch back to Interface Builder and hook up the Cancel and Done buttons to their respective action methods. One way to do this is to ctrl-drag

​​​​

Make sure you pick the cancel: and done: actions from the Sent Actions

In PlayerDetailsViewController.m, add the following two methods at the bottom of the file:

- (IBAction)cancel:(id)sender
{
    [self.delegate playerDetailsViewControllerDidCancel:self];
}
- (IBAction)done:(id)sender
{
    [self.delegate playerDetailsViewControllerDidSave:self];
}

These are the action methods for the two bar buttons. For now, they simply let the delegate know what just happened. It’s up to the delegate to close the screen. (That is not a requirement, but that’s how I like to do it. Alternatively, you could make the Add Player screen close itself before or after it has notified the delegate.)

Note: It is customary for delegate methods to include a reference to the object in question as their first (or only) parameter, in this case the ​​PlayerDetailsViewController​​. That way the delegate always knows which object sent the message.

Now that you’ve given the ​​PlayerDetailsViewController​​ a delegate protocol, you still need to implement that protocol somewhere. Obviously, that will be in ​​PlayersViewController​​

#import "PlayerDetailsViewController.h"
 
@interface PlayersViewController : UITableViewController <em><PlayerDetailsViewControllerDelegate></em>

Implement the delegate methods in PlayersViewController.m:

#pragma mark - PlayerDetailsViewControllerDelegate
 
- (void)playerDetailsViewControllerDidCancel:(PlayerDetailsViewController *)controller
{
    [self dismissViewControllerAnimated:YES completion:nil];
}
 
- (void)playerDetailsViewControllerDidSave:(PlayerDetailsViewController *)controller
{
    [self dismissViewControllerAnimated:YES completion:nil];
}

Currently these delegate methods simply close the screen. Later you’ll make them do more interesting things.

There is only one thing left to do to make all of this work: the Players screen has to tell the​​PlayerDetailsViewController​​

Add the following method to PlayersViewController.m

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier isEqualToString:@"AddPlayer"]) {
 
        UINavigationController *navigationController = segue.destinationViewController;
        PlayerDetailsViewController *playerDetailsViewController = [navigationController viewControllers][0];
        playerDetailsViewController.delegate = self;
    }
}

The ​​prepareForSegue:​​

Note: You never call ​​prepareForSegue:​​

The destination of this particular segue is the Navigation Controller, because that is what you connected to the Bar Button Item. To get the ​​PlayerDetailsViewController​​ instance, you have to dig through the Navigation Controller’s array of ​​viewControllers​​

Run the app, press the + button, and try to close the Add Player screen. It still doesn’t work!

​​​​

That’s because you never gave the segue an identifier. The code from prepareForSegue checks for that identifier (“AddPlayer”). It is recommended to always do such a check because you may have multiple outgoing segues from one view controller and you’ll need to be able to distinguish between them (something that you’ll do later in this tutorial).

To fix this issue, open Main.storyboard

In the Attributes inspector, set Identifier to AddPlayer:

​​​​

Run the app again; tapping Cancel or Done will now properly close the screen and return you to the list of players.

Note: It is perfectly possible to call dismissViewControllerAnimated:completion: from the modal screen. There is no requirement that says the delegate must do this. I personally prefer to let the delegate handle this but if you want the modal screen to close itself, then go right ahead.

By the way, the Attributes inspector for the segue also has a Transition

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Play with them to see which one you like best. Don’t change the Style setting, though. For this screen it should be Modal — any other option will crash the app!

You’ll be using the delegate pattern a few more times in this tutorial. Here’s a handy checklist for setting up the connections between two scenes:

1. Create a segue from a button or other control on the source scene to the destination scene. (If you’re presenting the new screen modally, then often the destination will be a Navigation Controller.)
2. Give the segue a unique Identifier. (It only has to be unique in the source scene; different scenes can use the same identifier.)
3. Create a delegate protocol for the destination scene.
4. Call the delegate methods from the Cancel and Done buttons, and at any other point your destination scene needs to communicate with the source scene.
5. Make the source scene implement the delegate protocol. It should dismiss the destination view controller when Cancel or Done is pressed.
6. Implement 

​​prepareForSegue​​

1. : in the source view controller and do 

​​destination.delegate = self;​​

1. .

Delegates are necessary because — at least on iOS 5 — there is no such thing as a “reverse segue”. When a segue is triggered it always creates a new instance of the destination view controller. You can certainly make a segue back from the destination to the source, but that may not do what you expect.

If you were to make a segue back from the Cancel button to the Players screen, for example, then that wouldn’t close the Add Player screen and return to Players, but it creates a new instance of the Players screen. You’ve started an infinite cycle of creating new view controllers over and over that only ends when the app runs out of memory.

Remember: Segues only go one way; they are only used to open a new screen. To go back you dismiss the screen (or pop it from the navigation stack), usually from a delegate. The segue is employed by the source controller only. The destination view controller doesn’t even know that it was invoked by a segue.

Note: Does creating a delegate protocol for each screen that you want to reach through a segue sound like a lot of work? That’s what the creators of UIKit thought too, so in iOS 6 they introduced a new concept: the unwind segue. With this new feature you can create segues that go back to the previous screen. That is what the green Exit icon is for in the storyboard. If you want to learn more about unwind segues, we’ve dedicated a chapter to it in ​​iOS 6 by Tutorials​​.

Static Cells

When you’re finished with this section, the Add Player screen will look like this:

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That’s a grouped table view, of course, but the new thing is that you don’t have to create a data source for this table. You can design it directly in Interface Builder — no need to write ​​cellForRowAtIndexPath​​ for this one. The feature that makes this possible is called static cells.

Select the table view in the Add Player screen and in the Attributes inspector change Content to Static Cells. Change Style from Plain to Grouped

​​​​

When you change the value of the Sections attribute, the editor will clone the existing section. (You can also select a specific section in the Document Outline on the left and duplicate it.)

The finished screen will have only one row in each section, so select the superfluous cells and delete them.

Select the top-most section (from the Document Outline). In its Attributes inspector, give the Headerfield the value Player Name.

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Drag a new Text Field into the cell for this section. Remove its border so you can’t see where the text field begins or ends. Set the Font to System 17 and uncheck Adjust to Fit.

You’re going to make an outlet for this text field on the ​​PlayerDetailsViewController​​ using the Assistant Editor feature of Xcode. Open the Assistant Editor with the button from the toolbar (the one that looks like a tuxedo / alien face). It should automatically open on PlayerDetailsViewController.h

Select the text field and ctrl-drag

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Let go of the mouse button and a popup appears:

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Name the new outlet nameTextField. After you click Connect, Xcode will add the following property toPlayerDetailsViewController.h:

@property (weak, nonatomic) IBOutlet UITextField *nameTextField;

Creating outlets for views on your table cells is exactly the kind of thing I said you shouldn’t try with prototype cells, but for static cells it is OK. There will be only one instance of each static cell and so it’s perfectly acceptable to connect their subviews to outlets on the view controller.

Set the Style of the static cell in the second section to Right Detail. This gives you a standard cell style to work with. Change the label on the left to read Game and give the cell a Disclosure Indicator

Make an outlet for the label on the right (the one that says “Detail”) and name it ​​detailLabel​​. The labels on this cell are just regular ​​UILabel​​

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The final design of the Add Player screen looks like this:

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Tip:

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Obviously, your app should work properly with both screen sizes. You can accomplish this with autosizing masks or the new Auto Layout technology from iOS 6. For the Ratings app, you don’t have to do anything fancy. It only uses table view controllers and they automatically resize to fit the extra screen space on the iPhone 5.

Back to the Add Player screen. When you use static cells, your table view controller doesn’t need a data source. Because you used an Xcode template to create the ​​PlayerDetailsViewController​​

Open PlayerDetailsViewController.m

#pragma mark - Table view data source

That should silence Xcode about the warnings it has been giving ever since you added this class to the project.

Run the app and check out the new screen with the static cells. All without writing a line of code — in fact, you threw away a bunch of code!

You can’t avoid writing code altogether, though. When you dragged the text field into the first cell, you probably noticed it didn’t fit completely. There is a small margin of space around the text field. The user can’t see where the text field begins or ends, so if they tap in the margin and the keyboard doesn’t appear, they’ll be confused.

To avoid that, you should let a tap anywhere in that row bring up the keyboard. That’s pretty easy to do, just add a ​​tableView:didSelectRowAtIndexPath:​​

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (indexPath.section == 0) {
        [self.nameTextField becomeFirstResponder];
    }
}

This just says that if the user tapped in the first cell, the app should activate the text field. There is only one cell in the section so you only need to test for the section index. Making the text field the first responder will automatically bring up the keyboard. It’s just a little tweak, but one that can save users a bit of frustration.

You should also set the Selection Style for that cell to None

All right, that’s the design of the Add Player screen. Now let’s actually make it work.

The Add Player Screen at Work

For now you will ignore the Game row and just let users enter the name of the player.

When the user presses the Cancel button the screen should close and whatever data they entered will be lost. That part already works. The delegate (the Players screen) receives the “did cancel” message and simply dismisses the view controller.

When the user presses Done, however, you should create a new Player object and fill in its properties. Then you should tell the delegate that you’ve added a new player, so it can update its own screen.

Inside PlayerDetailsViewController.m, first add an import:

#import "Player.h"

Then change the ​​done:​​

- (IBAction)done:(id)sender
{
    Player *player = [[Player alloc] init];
    player.name = self.nameTextField.text;
    player.game = @"Chess";
    player.rating = 1;
    [self.delegate playerDetailsViewController:self didAddPlayer:player];
}

The ​​done:​​ method now creates a new ​​Player​​ instance and sends it to the delegate. The delegate protocol currently doesn’t have this method, so change its definition in PlayerDetailsViewController.hfile to the following:

@class Player;
 
@protocol PlayerDetailsViewControllerDelegate <NSObject>
- (void)playerDetailsViewControllerDidCancel:(PlayerDetailsViewController *)controller;
- (void)playerDetailsViewController:(PlayerDetailsViewController *)controller didAddPlayer:(Player *)player;
@end

The “​​didSave​​” method declaration is gone. Instead, there is now a “​​didAddPlayer​​”.

The last thing to do is to add the implementation for this method in the object that acts as the delegate,PlayersViewController.m:

- (void)playerDetailsViewController:(PlayerDetailsViewController *)controller didAddPlayer:(Player *)player
{
    [self.players addObject:player];
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:([self.players count] - 1) inSection:0];
    [self.tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
    [self dismissViewControllerAnimated:YES completion:nil];
}

This first adds the new ​​Player​​You could have just done ​​[self.tableView reloadData]​​ but it looks nicer to insert the new row with an animation. ​​UITableViewRowAnimationAutomatic​​

Try it out, you should now be able to add new players to the list!

​​​​

If you’re wondering about performance of these storyboards, then you should know that loading a whole storyboard at once isn’t a big deal. The Storyboard doesn’t instantiate all the view controllers right away, only the initial view controller. Because your initial view controller is a Tab Bar Controller, the two view controllers that it contains are also loaded (the Players scene from the first tab and the scene from the second tab).

The other view controllers are not instantiated until you segue to them. When you close these view controllers they are immediately deallocated, so only the actively used view controllers are in memory, just as if you were using separate nibs.

Let’s see that in practice. Add these methods to PlayerDetailsViewController.m:

- (id)initWithCoder:(NSCoder *)aDecoder
{
    if ((self = [super initWithCoder:aDecoder])) {
        NSLog(@"init PlayerDetailsViewController");
    }
    return self;
}
 
- (void)dealloc
{
    NSLog(@"dealloc PlayerDetailsViewController");
}

You’re overriding the ​​initWithCoder:​​ and ​​dealloc​​When you close the Add Player screen, either by pressing Cancel or Done, you should see the ​​NSLog()​​from dealloc. If you open the screen again, you should also see the message from ​​initWithCoder:​​One more thing about static cells: they only work in ​​UITableViewController​​. Even though Interface Builder will let you add them to a Table View object inside a regular ​​UIViewController​​, this won’t work during runtime. The reason for this is that ​​UITableViewController​​

Prototype cells, on the other hand, work just fine in a table view that you place inside a regular view controller. Neither work for nibs, though. At the moment, if you want to use prototype cells or static cells, you’ll have to use a storyboard.

It is not unthinkable that you might want to have a single table view that combines both static cells and regular dynamic cells, but this isn’t very well supported by the SDK. If this is something you need to do in your own app, then see ​​this post on the Apple Developer Forums​​ for a possible solution.

Note: If you’re building a screen that has a lot of static cells — more than can fit in the visible frame — then you can scroll through them in Interface Builder with the scroll gesture on the mouse or trackpad (2 finger swipe). This might not be immediately obvious, but it works quite well.

The Game Picker Screen

Tapping the Game row in the Add Player screen should open a new screen that lets the user pick a game from a list. That means you’ll be adding yet another table view controller, although this time you’re going to push it on the navigation stack rather than show it modally.

Drag a new Table View Controller into the storyboard. Select the Game table view cell in the Add Player screen (be sure to select the entire cell, not one of the labels) and ctrl-drag to the new Table View Controller to create a segue between them. Make this a Push segue (under Selection Segue in the popup, not Accessory Action) and give it the identifier PickGame.

Double-click the navigation bar and name this new scene Choose Game. Set the Style of the prototype cell to Basic, and give it the reuse identifier GameCell. That’s all you need to do for the design of this screen:

​​​​

Add a new file to the project and name it GamePickerViewController, subclass ofUITableViewController. Don’t forget to set the Class in the storyboard so that your new​​GamePickerViewController​​

First let’s give this new screen some data to display. Add a new instance variable toGamePickerViewController.m:

@implementation GamePickerViewController
{
    NSArray *_games;
}

Fill up this array in ​​viewDidLoad​​:

- (void)viewDidLoad
{
    [super viewDidLoad];
 
    _games = @[@"Angry Birds",
        @"Chess",
        @"Russian Roulette",
        @"Spin the Bottle",
        @"Texas Hold'em Poker",
        @"Tic-Tac-Toe"];
}

Replace the data source methods from the template with:

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}
 
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [_games count];
}
 
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"GameCell"];
    cell.textLabel.text = _games[indexPath.row];
    return cell;
}

That should do it as far as the data source is concerned. Run the app and tap the Game row. The new Choose Game screen will slide into view. Tapping the rows won’t do anything yet, but because this screen is presented on the navigation stack you can always press the back button to return to the Add Player screen.

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This is pretty cool, huh? You didn’t have to write any code to invoke this new screen. You just ctrl-dragged from the static table view cell to the new scene and that was it.

Of course, this new screen isn’t very useful if it doesn’t send any data back, so you’ll have to add a new delegate for that. Replace GamePickerViewController.h

@class GamePickerViewController;
 
@protocol GamePickerViewControllerDelegate <NSObject>
- (void)gamePickerViewController:(GamePickerViewController *)controller didSelectGame:(NSString *)game;
@end
 
@interface GamePickerViewController : UITableViewController
 
@property (nonatomic, weak) id <GamePickerViewControllerDelegate> delegate;
@property (nonatomic, strong) NSString *game;
 
@end

You’ve added a delegate protocol with just one method, and a property that will hold the name of the currently selected game.

Add a new instance variable, ​​_selectedIndex​​, to GamePickerViewController.m:

@implementation GamePickerViewController
{
    NSArray *_games;
    NSUInteger _selectedIndex;
}

Then add the following line to the bottom of ​​viewDidLoad​​:

_selectedIndex = [_games indexOfObject:self.game];

The name of the selected game will be set in self.game. Here you figure out what the index is for that game in the list of games. You’ll use that index to set a checkmark in the table view cell. For this to work,​​self.game​​ must be filled in before the view is loaded. That will be no problem because you will do this in the caller’s ​​prepareForSegue:​​, which takes place before ​​viewDidLoad​​.Still in GamePickerViewController.m, change ​​cellForRowAtIndexPath:​​

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"GameCell"];
    cell.textLabel.text = _games[indexPath.row];
 
    if (indexPath.row == _selectedIndex) {
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
    } else {
        cell.accessoryType = UITableViewCellAccessoryNone;
    }
    return cell;
}

This sets a checkmark on the cell that contains the name of the currently selected game. Small gestures such as these will be appreciated by the users of the app.

Replace the placeholder ​​didSelectRowAtIndexPath​​

#pragma mark - Table view delegate
 
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
 
    if (_selectedIndex != NSNotFound) {
        UITableViewCell *cell = [tableView cellForRowAtIndexPath:
                                    [NSIndexPath indexPathForRow:_selectedIndex inSection:0]];
        cell.accessoryType = UITableViewCellAccessoryNone;
    }
 
    _selectedIndex = indexPath.row;
 
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
    cell.accessoryType = UITableViewCellAccessoryCheckmark;
 
    NSString *game = _games[indexPath.row];
    [self.delegate gamePickerViewController:self didSelectGame:game];
}

First this deselects the row after it was tapped. That makes it fade from the gray highlight color back to the regular white. Then it removes the checkmark from the cell that was previously selected, and puts it on the row that was just tapped. Finally, the method returns the name of the chosen game to the delegate.

Run the app now to test that this works. Tap the name of a game and its row will get a checkmark. Tap the name of another game and the checkmark moves along with it.

​​​​

The screen ought to close as soon as you tap a row but that doesn’t happen yet because you haven’t actually hooked up the delegate.

In PlayerDetailsViewController.h, add an import:

#import "GamePickerViewController.h"

And add the delegate protocol to the ​​@interface​​

@interface PlayerDetailsViewController : UITableViewController <GamePickerViewControllerDelegate>

In PlayerDetailsViewController.m, first add a new instance variable:

@implementation PlayerDetailsViewController
{
    NSString *_game;
}

You use this variable to remember the selected game so you can store it in the ​​Player​​ object later. It should get a default value. The ​​initWithCoder:​​

- (id)initWithCoder:(NSCoder *)aDecoder
{
    if ((self = [super initWithCoder:aDecoder])) {
        NSLog(@"init PlayerDetailsViewController");
        _game = @"Chess";
    }
    return self;
}

Note: If you’ve worked with nibs before, then ​​initWithCoder:​​ will be familiar. That part has stayed the same with storyboards; ​​initWithCoder:​​, ​​awakeFromNib​​, and ​​viewDidLoad​​

Change ​​viewDidLoad​​

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.detailLabel.text = _game;
}

Now add the ​​prepareForSegue:​​

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier isEqualToString:@"PickGame"]) {
        GamePickerViewController *gamePickerViewController = segue.destinationViewController;
        gamePickerViewController.delegate = self;
        gamePickerViewController.game = _game;
    }
}

This is similar to what you did before. This time the destination view controller is the game picker screen.​​prepareForSegue:​​ happens after ​​GamePickerViewController​​ is instantiated but before its view is loaded, so the ​​self.game​​ property already has the game’s name by the time ​​GamePickerViewController​​gets to ​​viewDidLoad​​.

All that remains is to implement the delegate method to close the game picker when the user is done with it:

- (void)gamePickerViewController:(GamePickerViewController *)controller didSelectGame:(NSString *)game
{
    _game = game;
    self.detailLabel.text = _game;
 
    [self.navigationController popViewControllerAnimated:YES];
}

This is pretty straightforward: you put the name of the new game into the ​​_game​​The ​​done:​​ method can now put the name of the chosen game into the new ​​Player​​

- (IBAction)done:(id)sender
{
    Player *player = [[Player alloc] init];
    player.name = self.nameTextField.text;
    player.game = _game;  // only this line is changed
    player.rating = 1;
 
    [self.delegate playerDetailsViewController:self didAddPlayer:player];
}

Awesome. You now have a functioning Choose Game screen!

​​​​

Where To Go From Here?

Here is an ​​Ratings iOS 7 example project​​ with all of the code from the above tutorial.

Congratulations, you now know the basics of using the Storyboard Editor, and can create apps with multiple view controllers transitioning between each other with segues!

If you want to learn more about Storyboards, check out our book ​​iOS 5 By Tutorials​​. It includes another entire chapter on “Intermediate Storyboards” where we cover:

• How to change the PlayerDetailsViewController so that it can also edit existing Player objects.
• How to have multiple outgoing segues to other scenes, and how to make your view controllers re-usable so they can handle multiple incoming segues.
• How to perform segues from disclosure buttons, gestures, and any other event you can think of.
• How to make custom segues – you don’t have to be limited to the standard Push and Modal animations!
• How to use storyboards on the iPad, with a split-view controller and popovers.
• And finally, how to manually load storyboards and use more than one storyboard inside an app.

We do our best to keep our books updated for the latest iOS version, so soon we will be releasing an update for “iOS 5 by Tutorials” that updates the entire book to iOS 7!

If you have any questions or comments on this tutorial or on storyboarding in general, please join the forum discussion below!