objective c tutorial free download

Ngày tải lên: 18/10/2014, 12:38

... indicate a file that holds Objective- C code and will be pro- cessed by the Objective- C compiler. File names ending in .c are handled by the C compiler, and .cpp files are the province of the C+ + ... is a sequence of characters, usually human- readable, so you can probably guess (correctly) that an NSString is a sequence of characters in Cocoa. Learn Objective- C on the Mac Penciled by ... Code /Download page of the Apress web site). This project is located in the 02.01 - Hello Objective- C folder. To create the project, start by launching Xcode. You can find the Xcode appli- cation...

Ngày tải lên: 07/12/2012, 15:47

... management used in Objective- C, and Objective- C 2.0’s newly added Blocks feature. Part I: Introduction to Objective- C n Chapter 1, C, The Foundation of Objective- C, ” is a high-speed introduction to the ... a 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 ... Objective- C 2.0 offers you the choice between using a manual refer- ence counting system or automatic garbage collection for managing object memory. With the exception of Chapter 15, which covers...

Ngày tải lên: 16/02/2014, 00:20

... language source file .cc, .cpp C+ + language source file .h Header file .m Objective- C source file .mm Objective- C+ + source file .pl Perl source file .o Object (compiled) file Objective- C source files ... NSData to Create Custom Archives 436 Using the Archiver to Copy Objects 439 Exercises 441 20 Introduction to Cocoa and Cocoa Touch 443 Framework Layers 443 Cocoa Touch 444 21 Writing iOS Applications ... more sophisticated iOS applications. Support If you go to classroomM.com /objective- c, you’ll find a forum rich with content.There you can get source code (note that you won’t find the “official” source code...

Ngày tải lên: 18/02/2014, 12:20

... produced pure C from Objective- C, classes were turned into structure definitions describing the layout of the objects. You can still see some legacy of this in GCC error messages, which will occasionally ... 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 ... new Objective- C keywords start with an @ sign. This is because this symbol is not allowed in C identifiers. Contrast this with C+ +, which introduces identifiers such as class, which breaks any C code...

Ngày tải lên: 06/03/2014, 07:20

... Objective- C application. Since no automatic garbage collector is available, simple rules are discussed which will allow you to expertly craft applications without introducing memory leaks. Chapter ... classes to inherit from a common base class. This concept is provided with a language construct called a protocol. Chapter 8 looks deeply at some of the aspects of Objective- C that make it unique. The ... of the box by Cocoa Touch, that can be used to store multiple pieces of related data. Chapter 5 covers how to create your own custom classes and objects. Learning how to create your own classes is...

Ngày tải lên: 06/03/2014, 20:20

... ã ằ c- a. -c r+ , CD ::r 0 CD ~ a C& apos;" co _. 3 < 0 I CD en Dl 0 I - 0 3 c: :: + _. \J 0 ti CD - ~ JJ » CD "&apos ;C - "&apos ;C 0 ... At its core, this book is about exploring Objective- C in the language's natural environment. Objective- C has a story to tell in code that is about computer science and ... can feel clumsy at times, Objective- C will show you its power and reach with grace. Problems that seem intractable in other programming languages melt away in Objective- Co...

Ngày tải lên: 08/03/2014, 16:20

... point number in scientific notation) %c Unsigned char (unsigned 8-bit character) %C Unichar (16-bit character) %p Pointer (printed in hexadecimal) %% Escape character so you can print the ... name car you have : NSObject. This means that your car is a subclass of NSObject. In fact, NSObject is the root object in Objective- C and all CHAPTER 1: Application Development 31 Choose Mac ... you can send the writeOutThisCarsState message to execute the code in the instance method. Car *newCar = [[Car alloc] init]; newCar.name = @"My New Car"; [newCar writeOutThisCarsState];...

Ngày tải lên: 15/03/2014, 02:20

... 221 Namespaces 221 Security 222 Calling C Functions from Objective- C 224 Tec hni cal 225 Practical 225 Philosophical 225 Summary 226 Exercises 226 12 Properties 229 Accessing Instance Variables ... Chapter 1 C, The Foundation of Objective- C Note The topic is beyond the scope of this book, but it is possible to mix Objective- C and C+ + code in the same program. The result is called Objective- C+ +. ... the Objective- C Cocoa frame- works. Even if you write the core of a Mac application in a different language, such as plain C or C+ +, your user interface layer should be written in Objective- C. ...

Ngày tải lên: 15/03/2014, 20:20

... that in Objective- C a class is also a type of object; the compiler creates exactly one object for each class at compile-time. By convention, class names begin with an uppercase letter, such as ... classes. The only remaining change Objective- C makes to plain C is the addition of square braces around Objective- C method calls: [someObject doSomething]. Since no valid pure -C statement can ... used to scope the contents of functions and loops in C, and are used to enclose the contents of certain types such as structures or, in Objective- C, a class’s instance variables. In C, the keywords...

Ngày tải lên: 15/03/2014, 20:20

... categories 138 6.7 Subclassing in your demo application 138 Creating and subclassing CTLease 139 Creating CTPeriodicLease as a subclass of CTLease 140 Creating CTFixedLease as a subclass of CTLease ... from scratch for each application, Apple includes in the SDK a set of support libraries collectively called Cocoa Touch. If you’re an existing Java or . NET developer, you can view the Cocoa ... user interface concepts by swapping controls around and reconnecting them to the class. If Xcode refuses to make a connection between a user interface control and an object, the most probable cause...

Ngày tải lên: 16/03/2014, 00:20

... write basic contents in each file. On the left of this window, click Cocoa Class, and find the template called Objective- C class. Make sure this template is selected, and click the Next button. You’ll ... need to, click the triangle to the left of each item to expand it so that you can see the Classes group. This is where we’ll add our new class description. Right-click (or C- click) the Classes ... right- click with the mouse (or C- click) on the Text App icon that has appeared in the Dock at the bottom of your screen and choose Quit. These are all perfectly acceptable ways to exit the application,...

Ngày tải lên: 22/03/2014, 15:20

... Using Constructors 97 6  About Access Speciers . 100 Using Public Access 102 Using Private Access . 103 Using Protected Access . 105 Using Class Variables ... Objective- C, any code block—that is, code enclosed in curly braces such as function bodies or the bodies of if statements— denes its own scope, so local variables will always take precedence ... 107 Accessing the Current Object . 109 Creating a Variable for Multiple Object Types . 111 Verifying at an Object Belongs to a Class 113 Checking an Object's Class with isKindOfClass...

Ngày tải lên: 29/03/2014, 06:20

... gotten a compile-time warning). 0, 0, 10, 30 Red (Circle) Circle class code [shape setFillColor: kRedColor]; Shape class code - (void) setFillColor: (ShapeColor) c { fillColor = c; } // setFillColor - ... 1 Chapter 1 Hello Welcome to Learn Objective- C on the Mac! This book is designed to teach you the basics of the Objective- C language. Objective- C is a superset of C and is the language ... is inside the circle calculate the area of the circle draw a circle in the bounds filled with fillColor } // draw [shape draw]; Circle class Figure 3-7. A circle finds its draw code. 30, 40, 50,...

Ngày tải lên: 29/03/2014, 07:20

... shows the ASCII table of characters. Because 1 byte can represent 256 characters, this works well for Western characters. For example, hexadecimal 20 represents a space. Hexadecimal 7D represents ... where the code is executed. Eventually, some condition is reached that causes isTrue to become FALSE. After completing all the code in the loop body, the condition (isTrue) is checked once more, ... the Object Gallery, select the Space Class from the Generic Alice Models. 6. Right-click the Lunar Lander to view some of the information about the object. See Figure 2–9. We can click “OK”...

Ngày tải lên: 29/03/2014, 07:20

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