Objective-C

Common version numbers such as2.0.1 compared to 2.0.2, 2.0.2 is newer than 2.0.1.So how to compare this version numberHere is a relatively simple implementation of the scheme2.0.1 This format can be split into multiple partsIf the 2 here is the big

First of all, the most important thing is not the code but the compiler option, make sure to change the compiler's compile Sources as option to objective C + + before doing a hybrid compilation.The default option is according to file type, in which

First, objective-c how to achieve:There are 2 plugins to use, one for Jsonkit and the other for Jastor, with a total of 6 files, 3. h header files and 3. m implementation files. How to import third-party tools that do not support arc in an ARC

  after iOS6.0 and OS X10.8, Apple introduced a set of informal protocols (informal protocol) that are directly bound to the OBJECTIVE-C syntax. Once you have implemented this method, you can use the array subscript to access the attribute elements  

Recently, we're going to develop some apps for the iphone, IPod Touch and ipad, so you need to start learning Objective C (Apple's launch of a C-like development language). Due to the limitations of Apple's self-closing industrial chain development

Transfer from http://blog.csdn.net/haishu_zheng/article/details/12873151The @dynamic in Objective-cThe difference between @dynamic and @synthesize@property have two corresponding words, one is @synthesize and the other is @dynamic. If @synthesize

OBJECTIVE-C Memory Management Management Category: OC objectsThe memory resources that each computer system can use for the program are limited. There are two things we should care about:Allocate when needed, release after useDo not use any

ARC mechanism and judging criteria Arc:auto Reference counting Automatic reference countis a compiler mechanism to add retain, release, Autorelease and other methods to our code during the compilation process.Forced to use after iOS7.0, so that

Use Ns_enum and Ns_options macros to define enumerations. Adopting modern Objective-cUse the Ns_enum macro to define a set of mutually exclusive enumeration values:typedef ns_enum (Nsinteger, Uitableviewcellstyle) {

Use of declarative properties: Declarative properties are called compile-time syntax @property (retain,nonatomic) Some *s; @property ( parameter one , parameter two ) Some *s; parameter 1: Retain: Decorated reference (object) data type Assgin:

objective-c (OBJC) is a clean language. It adds a complete object-oriented feature on the basis of C, but only introduces a limited new syntax ( which is really limited compared to C + +). Another important feature of OBJC is "dynamics", which can

As a fruit powder and programmer, Ben has a strong interest in OC and starts learning iOS. And also want to engage in iOS development work later. And will own the study record down, the saying is good, will not summarize the procedure ape, not good

Cocoais a native compilation environment on Mac OS x systems. He contains two frames, which are actually a series of libraries, Foundation and AppKit.On your iphone and other handheld devices, use one of his subcategories-Cocoa Touch. The Foundation

New is rarely used in real-world development, and generally we see [[ClassName alloc] init], but it doesn't mean you won't touch new, you'll see [ClassName new] In some code, and when you go to an interview, is also likely to be asked this

OverviewSince the launch of the WWDC 2015 and the Open source Swift 2.0, everyone's enthusiasm for Swift has soared again, while the envious startups ' friends talk about Swift's new features, as well as many developers who still need to stick to

1. There are often some variables in the class that require set and get operations, and OC provides convenient attribute @property to replace the set and get methods, which reduces the frequent and simple duplication of code. The following

Shallow copy: Copies only pointers to objects, not the reference object itself. Counter +1, like retain, for example.Deep copy: Copies the reference object itself. The counter does not change, resulting in a new objectRetain: Always shallow copy.

From: http://www.cnblogs.com/lm3515/archive/2010/12/20/1911135.html  Objective-C basic tutorial-learning Summary Outline: Introduction Notes compared with the C Language Objective-C advanced features Development Tool introduction (cocoa toolkit

Codeblocks integrated objective-C Development 1. First install the objective-C Compiler Gnustep Windows Installer provides a simulated development environment for objective-C on the Windows platform. There are four software packages, including

In my OS x programming of late, one debugging technique I thought wocould be handy is the ability log and trace Objective-C messages sent. it turns out this is not only possible, but quite easy. however my journey to this easy answer was quite long