Objective-C

1. When you create an object using new, alloc, or copy, the Count retain of the object reaches 1. You must delete this object release or autolease. In this way, it can be cleared only when its lifecycle ends. 2. When you use other methods to obtain

When you do not have a Mac or virtual machine, compile objective-C in windows.ProgramWhat about ?? Next, I will explain in detail how to compile objective-C language in windows. 1. Install the object-C CompilerThere are many objective-C

A framework is a software package that contains multiple classes. Mac operations provide dozens of frameworks to help us quickly develop applications on MAC systems.Program.In these frameworks, there are some basic frameworks, including: string

Http://www.cocoachina.com/macdev/objc/2011/0124/2602.html In the class implementation of objective-C, we often see the two keywords "self" and "super". Taking the previous OOP language experience as an example, C ++ assumes that self is equivalent

Using oC to call JS is simple. The system provides the stringbyevaluatingjavascriptfromstring method. [Webview stringbyevaluatingjavascriptfromstring: @ "document. Location. href"]; [webview stringbyevaluatingjavascriptfromstring: @ "jsmethod ()

During iPhone development, you will often encounter multiple strings to be connected. The following is my summary: Nsstring * Hello = @ "hello ,"; Nsstring * World = @ "world! "; Nsstring * helloworld; Connect the hello and world strings.

The following are the notes for learning objective-C 2.0. The original book I purchased is the original English version. Due to my limited level of English, there may be omissions in understanding. Original book purchase address: Amazon 5. Memory

Memory management basics When you write an application for Mac OSX, you can choose to allow garbage collection. This means that you do not have to consider memory management if it is not particularly complex. However, you will not always work in an

Log records In objective-C, it is very easy to output log information to the console. In fact, the nslog () function is similar to the printf () function in C language.% @A symbol represents an object.   Nslog (@ "the current date and time is: % @",

In addition to category, objective-C has an associative extension mechanism. Category is common and serves to extend some new methods to existing classes. So associative is something that category cannot do, and attributes can be extended. Official

1. nsarray is a static array. The content and length of the created array cannot be modified. Instance: // Use arraywithobjects to initialize an unchangeable array object. // Separate initialized values with commas (,) and end with nil. Nsarray6 *

1. Category (categories are also called categories. Add methods for classes without source code (System Classes and others' classes) 1) Role Extends others' classes and can be used as an alternative to subclasses. Put the code of the same class

  Use objective-C to parse HTML or XML. The system uses either libxml or nsxmlparser. However, both of these methods require writing a lot of code to process captured content, which is not intuitive. There is a better class library, hpple, which is

Reprinted please indicate the source: blog.csdn.net/zhangxingpingAttribute Declaration The attribute Declaration uses the keyword @ property. The attribute declaration can be any part of the method declaration block in the @ interface class. @

Objective-C Language Features 1. Objective-C is based on the C language. It is a design language that adds extensions to the C language to create and operate objects. 2. Objective-C is a superset of ANSI-C that can be mixed with C and C ++ code. 3.

1. Simple replication can only implement shallow copy: assign values to the pointer, so that the two pointers point to the same memory space, and the operation is not safe. 2. The foundation class complies with the and protocols to implement the

Document directory Nsarray Variable Array Enumeration Quick Enumeration Nsdictionary Cocoa provides many collection classes for use. The following describes how to use the objects. Nsarray Nsarray is a cocoa class used to store an ordered

Several data types in objective-C are not the same as those in C. It is hereby recorded. -ID is a pointer type that can point to any type of object. -Bool is the same as char, but it is used as a Boolean value. Yes indicates 1 No indicates

# Import int main (INT argc, char * argv []) {@ autoreleasepool {nslog (@ "Hello world! ");} Return 0;} the class and method in C ++ have determined the objective -- V Class-> message during the compilation period. If no exception is thrown, for

  I recently started to learn about iPhone development. Turing's basic objective-C tutorial is a good Getting Started Guide Book. Some minor problems are found during the learning process. Although it is not critical, it is helpful for developers