iOS Web data download and JSON parsing

Introduction to network data download and JSON parsing

In this article, I'm going to introduce you to any JSON-formatted data in iOS that uses nsrulconnection to download data from the Web, and how to display asynchronous downloads of data and images.

The relevant knowledge points

1.NSRULConnection of asynchronous downloads and encapsulation

Parsing of 2.JSON formats and JSON formats

3. Data display and sdwebimage asynchronous display pictures

Content

1. Introduction to Network Download basics

What is a Web application?

The program structure of network application

Common forms of network interfaces

Common data formats

General flow of interface development

Use of 2.NSRULConnection

NSString Downloading data synchronously

　　

1ViewController1 *VC1 =[[ViewController1 alloc] init];2Uinavigationcontroller *NVC1 =[[Uinavigationcontroller alloc] initwithrootviewcontroller:vc1];3     4ViewController2 *VC2 =[[ViewController2 alloc] init];5Uinavigationcontroller *NVC2 =[[Uinavigationcontroller alloc] INITWITHROOTVIEWCONTROLLER:VC2];6     7 8ViewController3 *VC3 =[[ViewController3 alloc] init];9Uinavigationcontroller *NVC3 = [[Uinavigationcontroller alloc] initwithrootviewcontroller:vc3];

3.JSON Format Declaration and formatting tools

4. Implementation of a complete page (including model creation, use of sdwebimage)

　　

iOS Web data download and JSON parsing