Frequently used iOS SDK libraries and third-party libraries

IOS SDK Library

1.Foundation

Cocoa is not a programming language (it can run multiple programming languages) and it is not a development tool (we can still develop cocoa programs via the command line), which is the native object-oriented API for creating Mac OS X and iOS programs, providing a programming environment for both applications.

We are often referred to as the "Cocoa framework", in fact cocoa itself is a collection of frameworks that contain many sub-frameworks, the most important of which are "Foundation" and "UIKit". The former is the foundation of the framework and is independent of the interface, which contains a large number of commonly used APIs, the latter being the underlying UI class library, which we will use frequently in iOS development.

2.CoreGraphics

The main engine for drawing on Quartz 2d:ios is a set of two-bit drawing and rendering APIs.

Core Graphics: It supports graphical contexts, loading images, drawing images, and so on. The Core Graphics uses the system's coordinate systems to draw pictures.

Core Animation helps developers implement animated frameworks on iOS.

3.CoreLocation for positioning

Mapkit for displaying maps

4. Cfnetwork

Cfnetwork is an underlying C-based framework provided by Apple in the core Foundation, which encapsulates the BSD socket of the lower OS layer, and the well-known network Framework ASI Network request is the encapsulation of the cfnetwork. Cfnetwork mainly relies on two api,cfsocket and cfstream,cfsocket primarily for communication at the bottom of the network, while Cfstream includes Cfreadstream and Cfwritestream, Used to read and write to the socket, respectively.

5.CoreData

Third-party library Afnetworking,mknetworkkit,asihttprequest,fmdb,zxing,zbar,sdwebimage

Zxing is an open source, Java-implemented, multi-format 1d/2d barcode Image processing library that contains ports that are linked to other languages. Zxing can be implemented using the phone's built-in camera to complete the barcode scanning and decoding.

Zbar is also a class library that scans two-dimensional codes written in C language.

ASIHTTPRequest is using the HTTP network request API in the iOS SDK, which is quite complex and cumbersome to call, ASIHTTPRequest is a set of APIs that encapsulates the Cfnetwork API and is very simple to use. Written in Objective-c, it can be used in Mac OS x system and iOS platform applications. ASIHTTPRequest applies to basic HTTP requests, and to the interaction between rest-based services.

Previously, ASIHTTPRequest was used as a network library, but since it stopped updating, there could be more problems on the iOS7 and decided to replace the network library.

At present, the most popular network library has afnetworking and Mknetworkkit, after some Google, the three libraries to obtain the following comparison:

	Afnetworking	Mknetworkkit	ASIHTTPRequest
Update status	Relatively many maintenance and users	Relatively few maintenance and users	Stop updating
Support for iOS and OSX	Is	Is	Is
ARC	Is	Is	Whether
Breakpoint Continuation	No, you can use Afdownloadrequestoperation	Is	Is
Synchronizing asynchronous requests	Supports only asynchronous	Whether	Is
Picture cached to Local	No, by Sdurlcache or Afcache	Whether	Whether
Picture Cache to Memory	Is	Is	Whether
Background download	Is	Is	Is
Download progress	No, you can use Afdownloadrequestoperation	Is	Is
Caching offline requests	No, by Sdurlcache or Afcache	Is	Whether
JSON, XML	Is	Is	Whether

According to the above comparison, afnetworking although compared to the Mknetworkkit function is weaker, but it is more extensible, and more maintenance, in the long run better than Mknetworkkit.

　　

Frequently used iOS SDK libraries and third-party libraries