IOS development-Stage 3-Weibo (2) (Weibo MVC) and iosmvc

IOS development-Stage 3-Weibo (2) (Weibo MVC) and iosmvc

 

MVC design pattern

Design Model: Experience, methods, and tools summarized by the predecessors

Delegate, observer, Singleton Factory

Model-View-Controller

Design Patterns widely used in iOS development

 

The Model processes data or business logic.

View Interface between the program and the user. You can see its existence.

The Controller processes user interaction and transmits data and request between views and models.

 

Controller-View Controller-Model

There is no direct operation between View and Model.

 

 

View: webView

Model: request sina

Controller: ViewCtroller

 

The user clicks View and passes the user operation to the Controller. After the Controller updates the Model and the Model operation, the user notifies the Controller that I have set the Controller to refresh the UI.

 

 

Unlike the DAO design mode, DAO is actually equivalent to the Model function in MVC.

 

Authorization

Access_token

TimeLineViewController public Weibo

 

M: ZYSinaEngine is responsible for Sina-related and request modules.

V: ZYLoginWebView displays the authorization interface for user interaction.

C: ZYTimeLineViewController is responsible for managing the data between V and M and the transmission of requests between V and V.

 

Interaction between Class and Class/(Object and object): 1. Notification 2. Proxy (Protocol) 3. property: object to be created

 

 

Design Code according to MVC

New ZYLoginWebView inherits from UIView

Add the webView attribute in ZYLoginWebView. h.

Create the webView Initialization Method in ZYLoginWebView and add

 

 

Set the proxy import Protocol to implement two protocol Methods

Override the layoutSubviews method to set the webView frame

Let the webView load request be managed by M to create Model class ZYSinaEngine

Add the plus sign method to the ZYSinaEngine class (convenient) authorizeReuqest to return a request

The authorizeReuqest method requires many application parameters created by Sina and the parameters are used multiple times. Therefore, the macro definition is in ZYSinaEngine.

 

 

In ZYLoginWebView. h, define ***-(void) loadAuthorizeRequest :( NSURLRequest *) request;

Create and initialize ZYLoginWebView in TimeLineViewController and load the request

Receive code in webView proxy method

 

 

After receiving the code, you need to tell TimeLineViewController to use the Protocol.

Because ZYLoginWebView wants to transmit information to others, in ZYLoginWebView, there should be a delegate Object Property id <protocol name> delegate

Write the Protocol method in ZYLoginWebView and call the Protocol method in. m.

NSError Composition

TimeLineViewController implements the proxy method to get the code

 

 

Declare an instance method in ZYSinaEngine to request accesstoken based on the code

After obtaining the token, inform the Controller to obtain the accesstoken usage protocol.

Because ZYSinaEngine wants to transmit information to others, ZYSinaEngine should have a delegate Object Property id <protocol name> delegate

 

 

Write the Protocol method in ZYSinaEngine and use the proxy object to call the Protocol method in. m. Because the Protocol method is an optional method, you should check whether the proxy object exists and whether the proxy method can be used.

TimeLineViewController implements proxy method to get access_token

Declare an instance method in ZYSinaEngine to request public microblog Data Based on accesstoken

After the data is obtained, the resolution tells the Controller to use ZYSinaEngineDelegate to obtain the data.