iOS Architecture and MVC

АРХИТЕКТУРА И MVC
Лекция 2

TTLabs - iOS Labs
Thursday, December 15, 11

КОМУНИКАЦИЯ

• http://www.slideshare.net/mignev/tag/ios-development-at-
initlab

• Google Groups

• Skype: dani_rangelov

• Facebook

• Mail: dani@tentouch.com


APPSTORE


CORE OS
iOS is a Mac OS X which is a UNIX - like system

Cocoa Touch
Security FW Accelerate FW

Media External Accessory FW

System
• Threading (POSIX threads)
Core Services •
•
Networking (BSD sockets)
File-system access
• Standard I/O
• Bonjour and DNS services
• Locale information
• Memory allocation
Core OS


CORE SERVICES

Cocoa Touch Threading High-Level
Features

File Access • ARC (Automatic
Reference Counting)

Media •
•
iCloud
GCD(Grand Central
Preferences •
Dispatch)
In-App Purchase
• SQLite

Core Services Collections Networking
• NSArray
• NSDictionary
• NSSet
Core OS Address Book


MEDIA LAYER

Cocoa Touch Core Audio Core Animation

AirPlay Audio Recording
Media
Quartz (2D) Audio Mixing

Core Services Video Playback OpenAL

JPEG, PNG, TIFF PDF
Core OS


COCOA TOUCH

Cocoa Touch Map Kit
High-Level Features

iAd • Push Notiﬁcations
• Storyboard

Media •
•
Local Notiﬁcations
Printing
Game Kit • Gesture Recognition
• File Sharing

Core Services Events (Touch)

View Controllers UIKit
Core OS


MVC - MODEL VIEW
CONTROLLER
Как да се изобрази

Controller

Определя поведението
Променя модела
Определя кое View получава touches

Описание Изобразяване

Model View
Запазва състоянието на апликацията Изпраща действията на потребителя към controller
Показва функционалността Изисква промяна на модела
Съобщава на View за промени Изобразява модела /render/


MVC - MODEL VIEW
CONTROLLER

Controller

Model View


MVC - MODEL VIEW
CONTROLLER
Notiﬁcation / KVO

Controller
De
leg
O ate
ut
let
Notify
Model View


CHAPTER 2

APPLICATION EVENTS
Core App Objects

Figure 2-1 Key objects in an iOS app

Model

Data Objects Document

Controller View

UIApplication Application Delegate UIWindow

Event Data Model Objects Data Model Objects
Data Model Objects Data Model Objects
Loop View Controller Views and UI Objects

Custom Objects

System Objects

Either system or custom objects

Table 2-1 The role of objects in an iOS app

MVC - MODEL VIEW
CONTROLLER
backgroundColor  property
hidden  property
alpha property

Controller userInteractionEnabled  property
multi pleTouchEnabled  property
autoresizingMask  property
autoresizesSubviews  property
– initWithFrame:
– addSubview:
– bringSubviewToFront:
– sendSubviewToBack:
– removeFromSuperview
CoreData + beginAnimations:context:
NSArray + commitAnimations
NSDictionary
plist
- viewDidLoad
- viewDidUnload
– viewWillAppear:
– viewDidAppear:
– viewWillDisappear:

Model –
–
viewDidDisappear:
shouldAutorotateToInterfaceOrientation:
-
–
–
willRotateToInterfaceOrientation:
didReceiveMemoryWarning
dismissViewControllerAnimated:
View
– presentModalViewController:animated:
– dismissModalViewControllerAnimated:


ОСНОВИ НА OBJECTIVE C
@“Hello World!”


OBJECTIVE C

• Комбинация межди C & Smaltalk

• Superset на С

• Компилира С и С++ класове

• NeXTSTEP (NS)

• Apple

• Objective C


XCODE


THE APP LAUNCH CYCLE
CHAPTER 3
App States and Multitasking

Foreground
Figure 3-2 Launching an app into the foreground

Launch Time Your code
User taps app icon

main()

UIApplicationMain()

Load main UI file

application:
Initialize the app
didFinishLaunchingWithOptions:

Foreground

Activate the app applicationDidBecomeActive:

Event
Handle events
Loop

Switch to a different app


51).

Suspended The app is in the background but is not
automatically and does not notify them

APPLICATION STATES
in memory but does not execute any c
When a low-‐memory condition occurs, t
to make more space for the foreground

Figure 3-1 State changes in an iOS app

Not running

Foreground

Inactive

Active

Background

Background

Suspended


RUN LOOP

main.m

• вход към програмата


.H ( HEADER FILE)

AppDelegate.h

• публични методи

• публични променливи


.M (IMPLEMENTATION FILE)
AppDelegate.m

• описание на методите


ВИВОДЕ МЕТОДИ

• instance

• class


ОСНОВЕН ОБЕКТ
NSObject

•- (id)init;

•+ (id)alloc;

•- (void)dealloc;

•- (id)copy;


MEMORY MANAGEMENT

• retain

• release

• вески обект, който притежаваме трябва да бъде
освободен, когато свършим работата си с него


APPLICATION SANDBOX APPENDIX A
The iOS Environment

Figure A-1 Sandbox directories in iOS

App Sandbox

MyApp.app

Documents
App

• собствени файлове ...
Library

tmp

• няма ...
достъм по чужди
App Sandbox

• сигурност App ...
App Sandbox

App ...

Important: The purpose of a sandbox is to limit the damage that a compromi
Thursday, December 15, 11 system. Sandboxes do not prevent attacks from happening to a particular app a

XCODE PROJECT


ЗА СЛЕДВАЩИЯТ ПЪТ
Подгряване


DATA MODEL
• NSString (NSMutableString)
• NSNumber
• NSData (NSMutableData)
• NSValue
• NSDate
• NSArray (NSMutableArray)
• NSDictionary (NSMutableDictionary)
• NSSet (NSMutableSet), NSOrderedSet
(NSMutableOrderedSet), NSIndexSet
(NSMutableIndexSet)


for iOS.

Figure 2-‐3 shows the basic structure of an app whose interface is constructed solely using view objects. In
BUILDING AN INTERFACE USING UIKIT
this instance, the main view spans the visible area of the window (minus the scroll bar) and provides a simple
white background. The main view also contains three subviews: an image view, a text view, and a button.

VIEWS
Those subviews are what the app uses to present content to the user and respond to interactions. All of the
views in the hierarchy are managed by a single view controller object.

Figure 2-3 Building your interface using view objects

View Controller

Application controller layer

View layer

Window View

Image View Text View Button

In a typical view-‐based app, you coordinate the onscreen views using your view controller objects. An app
always has one view controller that is responsible for presenting all of the content on the screen. That view
controller has a content view, which itself may contain other views. Some view controllers can also act as
Thursday, December 15, 11 containers for content provided by other view controllers. For example, a split view controller displays the

СТРУКТУРИ

• CGPoint
• CGSize
• CGRect = CGPoint, CGRect


БЛАГОДАРЯ!


iOS Architecture and MVC

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