Objective-C

Default Dynamic Behavior:The object is dynamically typed.The memory is allocated only at run time.A message is dynamically bound, and an object can only execute the message it understands as a "method call". Although dynamic execution

1. Convert string to date Nsdateformatter * dateformat = [[nsdateformatter alloc] init]; // instantiate an nsdateformatter object[Dateformat setdateformat: @ "yyyy-mm-dd hh: mm: SS"]; // you can set the time format as needed.Nsdate * Date =

First define a human parent class Definition: /// Human. h // OOP // created by Jimmy. yang on 11-2-9. // copy 2011 _ mycompanyname __. all rights reserved. // # import @ interface human: nsobject {bool sex;} + (void) tostring;-(void) showsex; @

If the lifecycle of an object is obvious, it is easy to know when to use a new object and when it is no longer needed. In this case, you can use manual retain and release to determine whether a person is born or dead. However, sometimes it is not

A New Keyword @ dynamic is added to objective-C 2.0 to define dynamic attributes. Compared with @ synthesis, dynamic attributes are not automatically generated by the compiler, setter, or getter, but are dynamically added at runtime. Generally,

(From: http://blog.csdn.net/arthurchenjs/article/details/6699598) If you want to write a class to ensure that only one instance exists and you can get the entry for providing services for this specific instance, you can use the single-State design

ArticleDirectory 1. Preface 1. Preface I believe that the iPhone will soon be released in China. Like the iPod Touch we can buy in China through regular channels, the iPhone is also an exciting product. When the iPhone is

OBJ-CThis quality is "improvedC Language", We all know that C language does not have garbage collection (GC) mechanism (Note: Although obj-c2.0 later added GC function, but not on the iPhone, so for iOS platformProgramThis is almost useless), so

This article is hard to understand. Because this is a big question, and I just want to summarize it for myself, I didn't want to write a long tutorial. Think about it. Write a memorandum to make it concise. According to the development guidelines

So far, I have seen two methods of serialization implemented by OC: nskeyedarchiver and nspropertylistserialization. In both serialization methods, nsdata is the target of serialization. The difference between the two methods is that

The following describes the runtime behavior of the OC class. This includes method replacement during running, message forwarding, and dynamic attributes. These are still very useful for the love of Aspect-Oriented Programming AOP. Of course, there

Admit that I am the Title party, because in the obj-C world, there is no official saying like "interface" or "generic. However, there are two concepts close to OBJ-C" Informal protocol (Interface) "And" Protocal) ". Informal agreement Although

A section on reading a book todayCodeWhen nsstring is instantiated, sometimes the initwithformat method is used, and sometimes the stringwithformat method is used. What should I choose? Differences: 1,Initwithformat is the instance method. It

// Initialize Lock Object Ticketcondition = [[Nscondition alloc] init]; // Start the first thread. Ticketsthreadone = [[nsthread alloc] initwithtarget: Self selector: @ selector (run) Object : Nil]; [ticketsthreadone setname: @" Thread-1 " ];

In C #, the metadata can be analyzed through reflection. Example: Code As follows: Using system; using system. reflection; namespace Hello {class program {static void main (string [] ARGs) {If (ismethoddefined (typeof (utils), "helloworld")

For (Uiview * View In [Self. backgroundview subviews]) { // [View removefromsuperview]; If ([[View superclass] description] isw.tostring: @" Uibutton " ]) { Uibutton * BTN = (uibutton *) view; BTN. titlelabel. Text = @" Dynamic

If you want to learn objective-C, please pay attention to it. We recommend some learning materials for you and hope it will be useful to you !!! Getting startedArticle: Learn objective-C is very simpleLearn objective-C

PropertyProbablyObjcUnique element inProgramming Mechanism, used to quickly generate class data membersGetAndSetMethod. This articleAbout mePropertySome usage experience. 1) Retain, copy, and assign: Retain is used to generate the reference

For our. NET developers,. NET provides an automatic memory management mechanism. We do not need to care about memory management. However, the iPhone cannot be developed. This article will briefly describe the memory management mechanism and methods

C # sister: Aunt, I 've been walking my dog so early today ?? Aunt Objective-C: Yes, my dog is old, and I am a little insomnia. I started to get up early... you see, this dog is so intelligent and obedient. // ********* File Dog. h **************** #