Three-tier MVC Architecture

Three-tier MVC Architecture
New ViewController class inherits UIViewController

AppDelegate. m

# Import "ViewController. h "# pragma mark-Override # pragma mark dealloc-(void) dealloc {[_ window release]; [super dealloc];} // set window self. window = [[[UIWindow alloc] init] autorelease]; self. window. frame = [UIScreen mainScreen]. bounds; self. window. backgroundColor = [UIColor whiteColor]; [self. window makeKeyAndVisible]; // set the Root View Controller ViewController * RootVC = [[ViewController alloc] init]; self. window. rootViewController = RootVC; [RootVC release];

New RootView class inherits UIView

Write in RootView. m

# Pragma mark-rewriting # pragma mark dealloc-(void) dealloc {[_ userName release]; [_ userPWD release]; [_ loginButton release]; [_ registerButton release]; [super dealloc];}-(instancetype) initWithFrame :( CGRect) frame {self = [super initWithFrame: frame]; if (self) {[self addAllViews];} return self ;} -(void) addAllViews {self. backgroundColor = [UIColor whiteColor]; self. userName = [[LTView alloc] initWithFrame: CGRectMake (30, 50,260, 40) text: @ "userName" placeHolder: @ "enter userName" isSecure: NO]; [self addSubview: _ userName]; [_ userName release]; self. userPWD = [[LTView alloc] initWithFrame: CGRectMake (30,100,260, 40) text: @ "password" placeHolder: @ "enter the password" isSecure: YES]; [self addSubview: _ userPWD]; [_ userPWD release]; self. loginButton = [UIButton buttonWithType: UIButtonTypeSystem]; self. loginButton. frame = CGRectMake (40,160, 80, 40); [self. loginButton setTitle: @ "login" forState: UIControlStateNormal]; [self addSubview: self. loginButton]; self. registerButton = [UIButton buttonWithType: UIButtonTypeSystem]; self. registerButton. frame = CGRectMake (150,160, 80, 40); [self. registerButton setTitle: @ "register" forState: UIControlStateNormal]; [self addSubview: self. registerButton];}

Write in ViewController. m

# Pragma mark-rewriting # pragma mark dealloc-(void) dealloc {[_ rootView release]; [_ userName release]; [_ userPWD release]; [super dealloc];} // write only these three sentences-(void) loadView {self. rootView = [[RootView alloc] initWithFrame: [UIScreen mainScreen]. bounds]; self. view = self. rootView; [_ rootView release];}

Simulated memory warning

# Pragma mark-simulated memory warning-(void) didReceiveMemoryWarning {[super didreceivemorywarning]; // if the Controller executes the viewDidLoad method (loading process ), if the view controlled by the controller is not displayed on the window, release the view controlled by the controller if ([self isViewLoaded] & self. view. window = nil) {self. view = nil;} NSLog (@ "receive memory warning"); // Dispose of any resources that can be recreated .}

Page Jump

-(Void) viewDidLoad {[super viewDidLoad]; [self. rootView. loginButton addTarget: self action: @ selector (loginButtonDidClicked :) forControlEvents: UIControlEventTouchUpInside]; [self. rootView. registerButton addTarget: self action: @ selector (operator :) forControlEvents: UIControlEventTouchUpInside];} # pragma mark-loginButton Click Event-(void) loginButtonDidClicked :( UIButton *) sender {NSLog (@ "click to log on");}-(void) registerButtonDidClicked :( UIButton *) sender {RegisterViewController * registerVC = [[RegisterViewController alloc] init]; // simulate the launch page and go to the next level: [self presentViewController: registerVC animated: YES completion: nil];}-(void) viewDidLoad {[super viewDidLoad]; [self. rooView. backButton addTarget: self action: @ selector (backButtonDidClicked :) forControlEvents: Success];} // page Jump-(void) backButtonDidClicked :( UIButton *) sender {[self resume: YES completion: nil];}

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