Objective-C

This paper discusses the core grammar of language objective-c. This section begins by detailing some specific syntax. As you would expect, the definitions and classes are involved. Classes are not special In Smalltalk, a class is an object with

BASE64 uses commonly used URL ciphertext encoding to pass longer identity information in an HTTP environment. The adoption of BASE64 encoding is not only shorter but also unreadable. The following address is the encrypted Thunderbolt dedicated

Previously implemented in the blog SHA1 Security has not met the needs of users, today the implementation of the sha224/sha256/sha384/sha512 attached. The SHA that Secure Hash algorithm (safe hashing algorithm) has many kinds of different bit number

The time and date conversion of this style, similar to the microblogging release time, has been sorted and summarized as follows, and has solved so many key questions: (1) Localize the time date string returned by the server (the server may not

#import #import "AppDelegate.h" int main (int argc, char * argv[]) { //similar to the map in Java, That is, the key value pair; nsdictionary *dict = @{@ "name": @ "Zhangsan", @ "age": @23}; Print out the whole dictionary; NSLog (@ "%@

Turn from: https://developer.apple.com/library/mac/releasenotes/ObjectiveC/RN-TransitioningToARC/Introduction/Introduction.html transitioning to ARC release Notes Automatic Reference Counting (ARC) is a compiler feature this provides Automatic

——————————————————————————————————————————— Class method ① class Method: + The beginning of the method (defined as the process form and the object method, just the + start, which is the only difference) The invocation of the class

Many operations under MacOS require administrator privileges, such as when we run chmod and can use sudo chmod at the command line to request to run with administrator privileges. However, programs written with Xcode cannot be used with sudo.You

Knowledge pointsthe focus function of the 1.NSArray class is usedThe key function of the 2.NSMutableArray class uses 3. String segmentation and splicing============================Nsarray, Nsmutablearray1. "Knowledge that needs to be understood"1.1

In objective-c, sorting is divided into:1. Sorting objects in the foundation framework2. Sort Custom ObjectsExample: Each student has a score score attribute, according to the score score the student sortCustom Object Student.hStudent.mMain.m#import#

Objective-c is an Apple software programming language that wants to learn, debug, and have an integrated development environment (IDE) handy. There are three types of methods for building OBJECTIVE-C's integrated development environment:1) using the

Written in the previous words:1, from now, this moment, began to work hard, move up!2, "Effective OBJECTIVE-C 2.0" This is a very real book, each chapter with specific examples to inform readers of such reasons!3, the book has been bought for a long

Written in the previous words:1, from now, this moment, began to work hard, move up!2, "Effective OBJECTIVE-C 2.0" This is a very real book, each chapter with specific examples to inform readers of such reasons!3, the book has been bought for a long

1. If the background returns a dictionary or an array of data types, use the following method to convert directly: { Data into a dictionary where Responseobject is the data returned nsdictionary *resultdictionary = [nsjsonserialization

IntroducedOBJECTIVE-C has postponed many decisions from a cheap period and link period to a run-time period. Whenever possible, it does a lot of things dynamically. This means that it requires not only a compiler, but also a runtime system to

http://leopard168.blog.163.com/blog/static/16847184420138153296930/http://blog.csdn.net/thdxs/article/details/109883431. The class method belongs to the entire class, not to an object.2. Class methods can access only class member variables, cannot

this article reprinted to http://blog.csdn.net/ztp800201/article/details/9240913For more than a year of iOS development, the deep understanding of iOS and objective-c is still limited, and most of it still stays at the API level, which is a pretty

http://www.justinyan.me/post/1306First, the origin of the problemAll originated in Apple's official documentation for the sample code for Singleton (Singleton): Creating a Singleton Instance.The main controversy is focused on the following paragraph:

About OBJECTIVE-COBJECTIVE-C is the primary programming language you use when writing software for OS X and IOS. It's a superset of the C programming language and provides object-oriented capabilities and a dynamic runtime. Objective-c inherits the

  In later chapters we will look at how to install and use objective-C on Windows and Linux systems for those that do not have access to Mac OS X. if you are planning to develop iPhone applications (or Mac OS X applications for that matter), however,