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

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What makes a classeasy to maintain?

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UIViewUIViewController Model

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What makes acontroller easy to maintain?

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

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

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

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

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

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

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Coordinated Views View One View Two View Three

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

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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;

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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;

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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;

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Demo

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Stewart GleadowEmail:sgleadow@thoughtworks.comTwitter:@stewgleadow