Objective-C

I. Object-oriented and encapsulationThree main object-oriented features: encapsulation (member variables), inheritance, and polymorphismIn the OC language, classes are processed using @interface and @implementation.@interface as if exposed to the

Developing iOS apps to invoke HTTP interfaces, get HTTP resources, have a fairly mature framework asihttprequest. I prefer to use the original API, which has many similarities with other object-oriented languages. This article describes the use of

The protocol @protocol in Objective-c, similar to the interface interface in Java, lists the methods that this class does not need to implement, and is implemented by classes that implement this Protocol.1 Declaration Agreement

The "plus sign stands for static" is the wrong thing to say, the person who might have expressed it to you actually means: "The method of the front Plus is equivalent to the static method inside java." In OC, methods are divided into class methods

objective-c and Core Foundation objects convert memory management to each otheriOS allows easy conversion between OBJECTIVE-C and Core Foundation objects, taking nsstring and Cfstringref as a direct conversion to no pressure:Cfstringref acfstring = (

Three main object-oriented features: encapsulation, inheritance, and polymorphismThe purpose of encapsulation is to hide the data, the outside world only through the method (interface) to access or set the data inside, can not directly modify or

The dictionary holds key-value pairs that can be obtained by key1. Create an immutable dictionary1 //1 F (1)2Nsdictionary * dic = [[Nsdictionary alloc] Initwithobjectsandkeys:@" One",@"1",@" Both",@"2",@"three",@"3", nil];3NSLog (@"%@", DIC);4

The difference between an object and a normal variable If you ' re used to using terms like the stack and the heap, a local variable was allocated on the stack, while objects be a Llocated on the heap. -(void) f{ int2;

The main content of this chapter will be gathered at runtime to handle member variables and attributes. Before discussing this, let's start with an important concept: type coding.Type encoding (Type Encoding)As a complement to runtime, the compiler

Today I learned several ways to pass the value ... Just sticking to the notes from the class. I don't know what it's called. Use variables to pass values Firstviewcontroller *FIRSTVC = [[Firstviewcontroller alloc] init];

Uiview,uilabel,uitextfield,viewcontroller .....However, none of the above is quite understood ...Here's what you learned =w=While the Baidu side learned. So many things come from other blogs. The back will post the source.. Frame: The position of

Preface: Because I want to high imitation an app, extract asserts from the app all the picture files, filenames with ~iphone This interference name, in order to remove this ~iphone this string, so I wrote a simple answer to the batch change all the

Protocol (Protocol) is a very important language feature in objective-c, conceptually, very similar to the interface in Java. A protocol is actually a collection of associated methods (for the convenience of the following, we name the protocol

Nil is used to assign values to objects (any object of object-c is of type ID), NULL assigns any pointer, null and nil are not interchangeable, nil is used for class pointer assignment (in Object-c, class is an object, is an instance of class

References in this document (HTTP://WWW.CSDN.NET/ARTICLE/2015-06-01/2824818-OBJECTIVE-C-STYLE-GUIDE/1)With good coding standards, we can keep our code elegant, easy to read and easy to maintain. We're going to start with the following points.1. Code

Artifice refers to a skill and a product that is too kit and useless.Reprint please indicate the source Uxyheaven csdn BlogIn fact, this technique is very useful in certain circumstances, and the requirements are not high.We had an interface 1,

When using functions such as nslog and [nsstring stringwithformat:], they all work based on C/C ++-style string formatting. Originally, C/C ++ has never been used. In iPhone development and development, the NS series objects are added, and the

Based on the C language, a minimum object-oriented syntax is added, which is fully compatible with the C language and can be incorporated into the C language code in the OC code, even C ++ code can use OC to develop application file extensions for

When programming with object-oriented languages such as OC, "object" is a "Basic constructor" (Building Block). developers can store and transmit data through objects. The process of passing data between objects and executing tasks is called

* ** Next to "C # my sister and Aunt Objective-C" (02), this is a Class-aunt's dog *** C # my sister: Wow, the road is narrow, isn't this an Objective-C aunt's dog? Dog: Who is it .. C # sister: Not convinced ~ Let's get you another toast .. #