oc cox

OC-Concepts and usage of protocols, oc-concepts of protocols In the previous article, we introduced the class extension in OC: Extend. The protocol in OC is equivalent to the interface (abstract class) in Java, but the name in OC is more vivid, because when we are learning

I. PrincipleFor any object that inherits the NSObject, there is an shaping variable associated with it, called the reference counter, and only when the counter has a value of 0, OC reclaims the object, otherwise it is never recycled.1. When creating an object, such as using Alloc, new, copy, the value of the reference counter is 12. When released using the release method, the value of the counter is reduced by 13. When using the Retain method, the val

Copyright Disclaimer: During reprinting, please use hyperlinks to indicate the original source and author information of the article and this statementHttp://zhaoleijun.blogbus.com/logs/25227570.html What is open collector (OC )? Let's talk about the structure of open collector output. As shown in structure 1 of open collector output, the transistor on the right has no collector, so it is called open collector (the transistor on the left is used for

Oc Lesson 3, oc Main Content: inheritance, initialization method (key), convenience Constructor (key) 1. Inheritance Inheritance means that the subclass inherits all instance variables and methods of the parent class. The parent class has some, but the subclass has some, and the parent class does not necessarily have Upper-level inheritance: parent class, lower-level inheritance: subclass Inheritance is a s

IOS Development Review notes (1)-Basic OC knowledge, ios-oc I have been studying IOS for more than three months since I went to work. Because of the weak foundation, I learned from the basic syntax of OC and read the books of grapefruit and grapefruit one after another, now I am looking at the actual programming practice. take this opportunity to make a good summ

OC, oc Language Features of the OC language 1. hyperset of the C-language statement, which allows the C-language program source code to be used in the OC. the compiler is compatible with the C-language program. 2. It has a complete pipeline object-oriented feature. 3. contains a runtime system. 5. Rich class librari

Go to swfit (3) Swift to call OC and swfitswift to call oc To call a custom OC class or open source package in Swift, you just need to do the bridge, create a file named project name-Bridging-Header.h file ,. the H file can import the file you want like in OC, and then the Objective-C Bridging Header in Build Settings

Is OC important work also done by the compiler ?, Oc compiler completed NO, the important work of OC is done by the "runtime component" instead of the compiler. In fact, all data structures and functions required to use the object-oriented feature of OC are in runtime components. For example: The runtime component

"OC" encapsulation, "oc 」1. object-oriented and Encapsulation Three main features of object-oriented: encapsulation, inheritance, and Polymorphism In the OC language, @ interface and @ implementation are used to process classes. @ Interface is like a clock surface exposed to the outside, like external display and interface. @ Implementation is like hiding the in

OC Project introduced to Swift,1. Build Bridge File: Create a new Swift file in the OC Project and confirm the creation of a project name-bridging-header.h file.2, after building the bridge file, import the file name to be used in itFor example when using Charts: @import Charts;Charts: Various statistical graphs (pie chart, line chart, histogram, etc.) tools, smooth and easy to use, effect to force.3, in th

OC learning --- proxy mode, oc --- proxy In the previous article, we introduced the concept of the Protocol in OC: Protocol. Here is a simple example: Children, nurses, and nannies. There are two methods for children: wash and play. Here, the proxy objects are nurses, nannies, and children. Take a look at the Code: First, let's take a look at the Child class: Chi

"OC" inheritance, "oc 」I. Basic usage1. design two types of Bird and Dog 1 // Bird Declaration 2 @ interface Bird: NSObject 3 {4 @ public 5 int weight; 6} 7-(void) eat; 8 @ end 9 // definition of Bird 10 @ implementation Bird11-(void) eat {12 NSLog (@ "eat-weight: % d", weight ); 13} 14 @ end15 // The Declaration of Dog 16 @ interface Dog: NSObject17 {18 @ public19 int weight; 20} 21-(void) eat; 22 @ end23

IOS JS interaction uses the system JSContext to call the OC method and Objective-C to call the JavaScript method. javascript interacts with oc.Ios js interaction is divided into two parts: 1. oc calls js This implementation is relatively simple, The local html, js, and css files are loaded in my project. Note that when you drag these files into the project, you choose to copy them to the project, (The dragg

Introduction to OC multi-file development and OC file Development Introduction to OC multi-file development: 1. Why use multiple files? In work, different classes are usually put into different files. The declarations and implementations of each class are separated and the declarations are written in. h. The header file is written in the corresponding. in the m

Syntactic sugar in OC, latest syntax summary, oc syntax sugar Summary Summary of the syntax in SAT OG OC There are a lot of SAT syntax materials. I 'd like to pick a few of them and send them to you. You can download them from the full score net SAT forum, which is quite comprehensive.Summary of all junior high school grammar? If the syntax is refined, you can

HTML代码：Call OC method with JS in #OBJECT-C[OBJC]View Plaincopy -(BOOL) WebView: (uiwebview*) WebView shouldstartloadwithrequest: (nsurlrequest*) Request Navigationtype :(uiwebviewnavigationtype) Navigationtype { NSString *URLSTR = Request.URL. absolutestring; Nsrange Range = [Urlstr rangeofstring:@ "ios://"]; if (Range. length!=0) { NSString *method = [Urlstr Substringfromindex: (Range.

[Oc learning notes] string, oc learning notes string 1 // create a string 2 NSString * str1 = [NSString string]; 3 // create a c string 4 NSString * str2 = [NSString stringWithCString: "ss" encoding: NSUTF8StringEncoding]; 5 // create a string 6 NSString * str3 = [NSString stringWithString: @ "dd"]; 7 // create nslog () format String 8 NSString * str4 = [NSString stringWithFormat: @ "s"]; 9 // set the file

After taking a photo and uploading it to iOS, the web Client displays the rotating Swift + OC solution, iosswift + oc Problem description: A strange phenomenon occurs when you upload a mobile phone portrait, that is, when you upload a photo, the mobile phone displays the portrait normally, but there is a left-hand 90 degrees problem on the web side. This problem occurs only when the picture is vertical. The

Dark Horse programmer ------ inheritance of OC object-oriented, dark horse ------ oc ------ Android training, iOS training, and Java training. We look forward to communicating with you ----- I. Basic concepts of Inheritance Inheritance is one of the three features of orientation. It refers to defining a new class based on a class. The original class becomes the parent class (base class), and the new class

"OC" constructor and classification, and "oc" ConstructorI. Constructor(1) Call of Constructor Create an available object: Person * p = [Person new]; The new method is actually divided into two steps to create an object: 1) Use the + alloc method to allocate storage space (return the allocated object ); 2) use the-init method to initialize the object. You can split the new method as follows: 1. Call the cla