Ios part1
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This document provides an overview and introduction to an iOS App Development course. It includes acknowledgements, course descriptions and objectives, evaluation criteria involving homework and projects, an overview of the iOS architecture and developer tools, and a basic "Hello World" example in Objective-C using Xcode. The course aims to teach students Objective-C, the iOS SDK frameworks, and design patterns for building iPhone and iPod touch applications.
![Hello World
#import <Foundation/Foundation.h>
int main (int argc, const char * argv[]) {
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
// insert code here...
NSLog(@"Hello, World!");
!
[pool drain];
return 0;
}
Thursday 26 July 12](https://image.slidesharecdn.com/iospart1-120808071946-phpapp01/85/Ios-part1-23-320.jpg)
![main
int main (int argc, const char * argv[]) {
....
return 0;
}
• Exactly like a main section in C or C++
• argc contains the number of command line arguments
• argv is an array of char pointers (C strings)
• main returns a value indicating success or failure
• By convention zero is success, non-zero is failure
Thursday 26 July 12](https://image.slidesharecdn.com/iospart1-120808071946-phpapp01/85/Ios-part1-25-320.jpg)
![Pools
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
...
[pool drain];
• These lines allocate an NSAutoreleasePool that is used for
memory management
• We’ll cover memory management in some detail in the
coming classes, but for now we’ll just be sure to include this
code and put our program between these 2 statements
Thursday 26 July 12](https://image.slidesharecdn.com/iospart1-120808071946-phpapp01/85/Ios-part1-26-320.jpg)
Ios part1
- 1. iOS App Development Lecture 1 - Introduction Thursday 26 July 12
- 2. Acknowledgements • Slides based on the iOS App Development course at UMBC (http:// cs491f10.wordpress.com/) and CS 193P at Stanford University (http:// www.stanford.edu/class/cs193p/cgi-bin/ drupal/) Thursday 26 July 12
- 3. Course Description • This course provides a study of the design, development and publication of object-oriented applications for iOS platforms (e.g. iPhone, iPod touch & iPad) using the Apple SDK. Students will learn to utilise Objective-C and the various SDK frameworks to build iPhone & iPod touch applications under Mac OS X. • Prerequisites: RW 214 and RW 344 • Recommended: Competency in C or C++ (pointers, memory management, etc.) Thursday 26 July 12
- 4. Course Objectives • Gain an understanding of the Objective-C language • Become familiar with the Apple development tools • Understand and apply design patterns in order to build mobile applications • Understand and utilise hardware emerging in today’s mobile devices • Be able to utilise core frameworks of iOS Thursday 26 July 12
- 5. Evaluation • Homework: 20% • Project: 30% Thursday 26 July 12
- 6. Homework 1. Create “Your first iOS application” & demo to me: 2.5% 2. Write ImageProcessing Application: 17.5% Thursday 26 July 12
- 7. Project • Theme: Mobile for African problems • Functional specification (What): 5% • Compare to existing products (Why) • Task list with milestones and deadlines, mockup: 5% • Final project and demo: 20% Thursday 26 July 12
- 8. Grading Criteria • Correctness of App • Appearance of App • Adherence to Objective-C and iOS coding conventions • Neatly formatted and indented code • Well documented header files • Absence of significant performance issues • Absence of memory leaks Thursday 26 July 12
- 9. iOS Developer University Program • Apple has a free iOS University program that provides more benefits than the free registration, including: • Free on-device development • Developer forum access • We will be participating in this program this semester, so if you have an iPhone, iPod touch or iPad, you’ll be able to install and run your apps on- device Thursday 26 July 12
- 10. When / Where did it all start? Thursday 26 July 12
- 11. iOS Architecture Thursday 26 July 12
- 12. OS X Architecture Picture from Wikipedia Thursday 26 July 12
- 13. iOS Core OS Core OS Power Cocoa Touch OS X Kernel Management OSX Kernel Power Management Keychain Media Mach 3.0 Mach 3.0 Keychain Access Access BSD BSD Certificates Certificates Core Services Sockets Sockets File System File System Core OS Security Bonjour Security Bonjour Thursday 26 July 12
- 14. iOS Core Services Core OS Cocoa Touch Collections Core Location OSX Kernel Power Management Media Address Book Net Services Mach 3.0 Keychain Access BSD Networking Certificates Threading Core Services Sockets File Access File System Preferences Core OS Security Bonjour SQLite URL Utilities Thursday 26 July 12
- 15. iOS Media Core OS JPEG, PNG, Cocoa Touch Core Audio TIFF OSX Kernel Power Management Media OpenAL PDF Mach 3.0 Keychain Access BSD Mixing Quartz (2D) Audio Certificates Core Services Sockets Audio Core System File Recording Animation Core OS Security Bonjour Video OpenGL ES Playback Thursday 26 July 12
- 16. iOS Cocoa Touch Core OS Cocoa Touch Multi-Touch Alerts OSX Kernel Power Management Media Core Motion Web View Mach 3.0 Keychain Access View BSD Hierarchy Certificates Map Kit Core Services Sockets Localisation File System Image Picker Core OS Security Bonjour Controls Camera Thursday 26 July 12
- 17. Model View Controller Controller View Model Thursday 26 July 12
- 18. A different view Thursday 26 July 12
- 19. Development Stack — Tools Text Images from Apple Thursday 26 July 12
- 20. Development Stack — Frameworks Development Stack — Frameworks Foundation Address Book Map Kit Core Data UI Kit Core Animation OpenGL Many Others... Thursday 26 July 12
- 21. Development Stack — Language & Development Stack — Language & Runtime Runtime Objective-C Thursday 26 July 12
- 22. Hello World in Objective-C & Xcode Thursday 26 July 12
- 23. Hello World #import <Foundation/Foundation.h> int main (int argc, const char * argv[]) { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; // insert code here... NSLog(@"Hello, World!"); ! [pool drain]; return 0; } Thursday 26 July 12
- 24. Import Statement #import <Foundation/Foundation.h> • Exactly like a #include in C/C++, however it ensures that the header is only ever included once • Foundation/Foundation.h includes many core functions, constants, and objects Thursday 26 July 12
- 25. main int main (int argc, const char * argv[]) { .... return 0; } • Exactly like a main section in C or C++ • argc contains the number of command line arguments • argv is an array of char pointers (C strings) • main returns a value indicating success or failure • By convention zero is success, non-zero is failure Thursday 26 July 12
- 26. Pools NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; ... [pool drain]; • These lines allocate an NSAutoreleasePool that is used for memory management • We’ll cover memory management in some detail in the coming classes, but for now we’ll just be sure to include this code and put our program between these 2 statements Thursday 26 July 12
- 27. NSLog and @“strings” NSLog(@"Hello, World!"); • NSLog is a function that’s used for printing a string to the console (with some other logging information) • Note the goofy @ symbol out in front of the double quoted string • The @ symbol is used to distinguish the string as an Objective-C string (as opposed to a C string) • NSLog behaves much like C’s printf function in that it can take formatters using % notation and variable number of arguments Thursday 26 July 12