1.
Avoiding oversized
view controllers
in iOS
Stewart Gleadow
Email:
sgleadow@thoughtworks.com
Twitter:
@stewgleadow

2.
What makes a class
easy to maintain?

3.
UIView
UIViewController
Model

4.
What makes a
controller easy to
maintain?

5.
UIViewController
- (id)init;
- (void)loadView;
- (void)viewDidLoad;
- (void)viewWillAppear:(BOOL);
- (void)viewDidAppear:(BOOL);
- (void)viewWillDisappear:(BOOL);
- (void)viewDidDisappear: (BOOL);
- (void)viewDidUnload;
- (void)dealloc;

6.
UIViewController
- (id)init;
- (void)loadView;
- (void)viewDidLoad;
- (void)viewWillAppear:(BOOL);
- (void)viewDidAppear:(BOOL);
- (void)viewWillDisappear:(BOOL);
- (void)viewDidDisappear: (BOOL);
- (void)viewDidUnload;
- (void)dealloc;

7.
UIViewController
- (id)init;
- (void)loadView;
- (void)viewDidLoad;
- (void)viewWillAppear:(BOOL);
- (void)viewDidAppear:(BOOL);
- (void)viewWillDisappear:(BOOL);
- (void)viewDidDisappear: (BOOL);
- (void)viewDidUnload;
- (void)dealloc;

8.
- (id)init;
{
if ((self = [super init]))
{
// create data related objects
}
return self;
}
- (void)dealloc;
{
// release any data related objects
[super dealloc];
}

9.
- (void)loadView;
{
[super loadView];
// create all your views
// assign delegates
}
- (void)viewDidUnload;
{
// release any view related
[super viewDidUnload];
}

10.
@interface MatchViewController : UIViewController
<UITableViewDelegate,
UITableViewDataSource,
UIScrollViewDelegate,
TTModelDelegate,
...>

11.
Coordinated Views
View One
View Two
View Three

12.
Coordinator
- (id)init;
- (UIView *)view;
- (void)releaseView;
- (void)dealloc;

13.
ViewController Coordinator
- (id)init; - (id)init;
- (void)loadView; - (UIView *)view;
- (void)viewDidLoad; - (void)releaseView;
- (void)viewWillAppear:(BOOL);
- (void)viewDidAppear:(BOOL); - (void)dealloc;
- (void)viewWillDisappear:(BOOL);
- (void)viewDidDisappear: (BOOL);
- (void)viewDidUnload;
- (void)dealloc;

14.
ViewController Coordinator
- (id)init; - (id)init;
- (void)loadView; - (UIView *)view;
- (void)viewDidLoad; - (void)releaseView;
- (void)viewWillAppear:(BOOL);
- (void)viewDidAppear:(BOOL); - (void)dealloc;
- (void)viewWillDisappear:(BOOL);
- (void)viewDidDisappear: (BOOL);
- (void)viewDidUnload;
- (void)dealloc;

15.
ViewController Coordinator
- (id)init; - (id)init;
- (void)loadView; - (UIView *)view;
- (void)viewDidLoad; - (void)releaseView;
- (void)viewWillAppear:(BOOL);
- (void)viewDidAppear:(BOOL); - (void)dealloc;
- (void)viewWillDisappear:(BOOL);
- (void)viewDidDisappear: (BOOL);
- (void)viewDidUnload;
- (void)dealloc;

16.
Demo

17.
Stewart Gleadow
Email:
sgleadow@thoughtworks.com
Twitter:
@stewgleadow