objective c 2 0 programming language pdf

... contained herein. 1 Objective-C (Computer program language) 2 Object-oriented programming (Computer science) 3 Macintosh (Computer) Programming. I Title QA76.73.O115K63 2009 005.1'17 dc22 2008049771 ... 212 Initializing Classes 212 Scope Revisited 214 Storage Class Specifiers 220 Enumerated Data Types 222 The typedef Statement 225 Data Type Conversions 227 Exercises 229 Chapter 11 Categories ... and Protocols 232 Categories 232 Protocols 238 Composite Objects 242 Exercises 243 Chapter 12 The Preprocessor 246 The #define Statement 246 The #import Statement 254 Conditional Compilation

Ngày tải lên: 12/08/2014, 23:22

... with a short intsize of 16 bits: w1 0000 0000 0001 0101 0x15 w2 0000 0000 0000 1100 & 0x0c ——————————————————————————————————— w3 0000 0000 0000 0100 0x04 Bitwise ANDing is frequently used ... of w1clusive-ORed with w2would be hexadecimal e8, as illustrated:Ex-w1 0000 0000 0101 1110 0x5e w2 0000 0000 1011 0110 ^ 0xd6 ———————————————————————————————————— 0000 0000 1110 1000 0xe8 The ... next hexa-w1 0000 0000 0001 1001 0x19 w2 0000 0000 0110 1010 | 0x6a ————————————————————————————————————— 0000 0000 0111 1011 0x7b Bitwise Inclusive-ORing, frequently called just bitwise ORing,

Ngày tải lên: 12/08/2014, 23:22

... *f1 = [[Fraction alloc] init]; Fraction *f2 = [[Fraction alloc] init]; Fraction *fracResult; Complex *c1 = [[Complex alloc] init]; Complex *c2 = [[Complex alloc] init]; Trang 23190 Chapter 9 Polymorphism, ... following code sequence Rectangle *myRect = [[Rectangle alloc] init]; [myRect setWidth: 10 andHeight: 3]; (400, 300) Figure 8.10 Intersecting rectangles Trang 20Polymorphism, Dynamic Typing, ... at (100, 200) Origin at (100, 200) Trang 8Overriding Methods That’s better.This time, changing the value of myPointto(50, 50)insidemainhad no effect on the rectangle’s origin because a copy of

Ngày tải lên: 12/08/2014, 23:22

... definition of the class and is notgood programming practice category can exist in a given Objective-C namespace.This can be tricky because the jective-C namespace is shared between the program code and ... methods. Notice that the protocol doesn’t reference any classes; it s classless Any class can You can check to see whether an object conforms to a protocol by using the conformsToProtocol:method ... expressions such as this: if ( IS_LOWER_CASE (c) ) You can even use this macro in another macro definition to convert a character fromlower case to upper case, leaving any nonlowercase character unchanged:

Ngày tải lên: 12/08/2014, 23:22

... key conceptswhen dealing with pointers in Objective-C Pointers and Arrays If you have an array of 100 integers called values, you can define a pointer called valuesPtr, which you can use to access ... array of type char or a literal C-style character string, but not a character string object. Trang 11Constant Character Strings and PointersThe fact that the callcopyString (string2, “So is this.”); ... copyString (char *to, char *from); char string1[] = “A string to be copied.” 2 ; char string2[50]; copyString (string2, string1); charac-copyString.This reflects how the function will use these two variables

Ngày tải lên: 12/08/2014, 23:22

... AddressCard *card1 = [[AddressCard alloc] init]; AddressCard *card2 = [[AddressCard alloc] init]; AddressCard *card3 = [[AddressCard alloc] init]; AddressCard *card4 = [[AddressCard alloc] init]; ... @”tony.iannino@techfitness.com”; AddressCard *card1 = [[AddressCard alloc] init]; AddressCard *card2 = [[AddressCard alloc] init]; [card1 setName: aName andEmail: aEmail]; [card2 setName: bName ... AddressCard *card2 = [[AddressCard alloc] init]; AddressCard *card3 = [[AddressCard alloc] init]; AddressCard *card4 = [[AddressCard alloc] init]; AddressBook *myBook = [AddressBook alloc]; // First

Ngày tải lên: 12/08/2014, 23:22

... according to the <NSCopying>protocol We now show how you can add a copymethod to your Fractionclass, which youused extensively in Part I,“The Objective-C 2.0 Language.” Note that the techniques ... garbage collection is on, methodcalls such as retain,autorelease, andreleaseare ignored Trang 20Copying Objects This chapter discusses some of the subtleties involved in copying objects.We introducethe ... message such as lo-[origin setX: 100 andY: 200]; changes the x, y coordinate of the XYPointobject referenced by both the originandpt variables because they both reference the same object in memory

Ngày tải lên: 12/08/2014, 23:22

... http://www.simpopdf.com 470 Chapter 21 Writing iPhone Applications Figure 21.10 Changing the window’s background color. Figure 21.11 Interface window changes to black. Simpo PDF Merge ... Objective-C language abstract class A class defined to make creating subclasses easier Instances are created from the subclass, not of the abstract class See also concrete subclass accessor method ... (displayString).There is also a Calculator object (myCalculator) that can perform the actual calculation between the two fractions.We will associate a single method called clickDigit: to handle the pressing

Ngày tải lên: 12/08/2014, 23:22

... { 0.0, 0.0 }; Type Modifiers: const, volatile, and restrict cannot be modified So, the declaration const int x5 = 100; program’s execution.) The compiler is not required to flag attempts to change ... (struct point) {.x = 0, y = 0} origin = (struct point) {.x = 0, y = 0}; like so: moveToPoint ((struct point) {.x = 0, y = 0}); int *, the statement intPtr = (int [100]) {[0] = 1, [50] = 50, [99] ... all such methods in the listed protocols Instance Variable Declarations className If access has been restricted with an @privatedirective, subclasses cannot cess the variables declared as such (refer

Ngày tải lên: 12/08/2014, 23:22

... XACT project to our Content project • Create a class to load our XACT project and play cues • Hard-code some cues to play at specific spots in our game Let’s start by adding the XACT project ... static portions of a class: the static constructor The static constructor is never declared with a scope (such as public or private) because it is automatically fired before any other static member ... to add a case to the big switch case block in the constructor for ScriptLine to parse the command string into our script line command format In the switch block in the constructor for ScriptLine,

Ngày tải lên: 01/07/2014, 22:20

... with 256 colors ■ Keyboard and Microsoft mouse or compatible pointing device xxiii Trang 22❑ Windows Server 2003, x64 Editions (WOW) ❑ Windows Server 2003 R2 ❑ Windows Server 2003 R2, x64 ... editions, contact your local Microsoft Corporation office or contact Microsoft Press Inter­ national directly at fax (425) 936-7329 Visit our Web site at www.microsoft.com/mspress Send comments ... the Microsoft Certifications For a full list of Microsoft certifications, go to www.microsoft.com/learning/mcp/default.asp Technical Support Every effort has been made to ensure the accuracy

Ngày tải lên: 07/07/2014, 05:20

... the culture settings You can, however, change the current culture of your application in code by setting the current culture to a new instance of the CultureInfo class The Cul­ tureInfo class contains ... spe­cific culture You set the current culture of an application programmatically by setting the CurrentThread.CurrentCulture property to a new instance of the CultureInfo class The CultureInfo constructor ... read “$500.00” because it is not formatted by the application The text in Label2, however, will read “500,00 £” Note that the currency symbol is changed to the appropriate symbol for the locale—in

Ngày tải lên: 07/07/2014, 05:20

... Console.WriteLine("|{0:#.00}|{1:0.00}|{2,5:0.00}|{3,-5:0.00}|", 23, 23, 23, 23); } } Output: |$1.23|($1.23)| |123|-0123| |1.23|1.2300| |1.230000E+000|1.23| |123.00 %|1.23| |FF|000FF| FF|FF | |.23|0.23| 0.23|0.23 | ... precision false \u0000 0 0 0 0 0.0 0.0 0.0 n.a \u0000 \uFFFF -128 127 255 -32768 32767 65535 -2147483648 2147483647 4294967295 -9223372036854775808 9223372036854775807 18446744073709551615 see text ... a discount (call back) Console.WriteLine("Please pay {0:C} (20% discount)", TotalWithDiscount(a)); } } Output: Please pay $60.00 (no discount) Please pay $48.00 (20% discount) ■ 3.2.5 3.3 Class

Ngày tải lên: 05/08/2014, 10:20

... SpecificCatchClauses GeneralCatchClause? ) | ( SpecificCatchClauses? GeneralCatchClause ) SpecificCatchClause = "catch" "(" ExceptionType Identifier? ")" Block GeneralCatchClause ... mustbe associated with one or more catch clauses and/or a finally clause try { } catch (SpecificException e) { // From specific // Handle a specific exception } catch (GenericException e) { ... exception that is raised try { } catch (SpecificException e) { // From specific // Handle a specific exception // } catch (GenericException e) { // To more generic // Handle a more generic

Ngày tải lên: 05/08/2014, 10:20

... ICallbackEventHandler 294 Generating the callback code 296 Making the callback call 297 Callback source code 298 Trang 16Table of Contents xiiiBook IV: C# 301 Chapter 1: C# Programming Basics ... 814Connecting Web Parts Dynamically 820Web parts à la mode 821Creating a mode selector 821Adding a ConnectionsZone interface 823Making connections 824Breaking connections 826Using the Editor Controls ... Visual Studio 2005 21 Looking at Visual Studio 2005 Editions 21 Considering Visual Web Developer 2005 Express Edition 22 Installing Visual Web Developer 2005 Express Edition 22 Registering

Ngày tải lên: 12/08/2014, 08:22

... (Computer science) 3. Macintosh (Computer) Programming. 4. iPhone (Smartphone )Programming. I. Title. QA76.73.O11 5C5 8 20 11 00 5.1'17dc 22 201 001 93 60 Copyright â 20 11 Pearson Education, Inc. All ... and Security 21 3 12 Properties 22 9 13 Protocols 24 9 III: Advanced Concepts 26 5 14 Reference Counting 26 7 15 Garbage Collection 29 1 16 Blocks 309 Download from www.wowebook.com ptg For a language ... process on some computer. One of the characteristics that distinguishes Objective- C from other common languages, especially C+ +, is that Objective- C is a very dynamic language. “Dynamic” here means...

Ngày tải lên: 16/02/2014, 00:20

... Paths 20 1 Observing Keys 20 3 Ensuring KVO Compliance 20 5 12 Handling Errors 20 9 Runtime Differences for Exceptions 21 0 Wow! eBook <WoweBook.Com> ptg651 923 9 30 CHAPTER 2: An Objective- C Primer with ... Network Access 28 3 Wrapping C Sockets 28 4 Connecting to Servers 28 6 Sharing Objects Over a Network 28 9 Finding Network Peers 29 2 18 Debugging Objective- C 29 7 Inspecting Objects 29 8 Recognizing ... Support 12 Compiling Objective- C Programs 14 2 An Objective- C Primer 17 Declaring Objective- C Typ es 18 Sending Messages 22 Understanding Selectors 26 Declaring Classes 28 Using Protocols 33 Adding...

Ngày tải lên: 06/03/2014, 07:20