IOS network with multithreaded--3. Network request with asynchronous get mode (non-blocking)

By getting the network data asynchronously, the asynchronous request does not block the main thread (the user interface does not die) and a new thread is created.

The code is as follows

ViewController.h file

1 //2 //ViewController.h3 //Appdemo4 //5 //Created by Jinxin on 15/12/2.6 //copyright©2015 year xx. All rights reserved.7 //8 9 #import<UIKit/UIKit.h>Ten  One //1. Add a protocol agent A @interfaceViewcontroller:uiviewcontroller<nsurlconnectiondatadelegate> -  - //2. Add a property to accept the network data.  the@property (nonatomic) NSData *Receivedata; -  - @end

VIEWCONTROLLER.M file

1 //2 //VIEWCONTROLLER.M3 //Appdemo4 //5 //Created by Jinxin on 15/12/2.6 //copyright©2015 year xx. All rights reserved.7 //8 9 #import "ViewController.h"Ten  One  A @interfaceViewcontroller () -  - @end the  - @implementationViewcontroller -  -- (void) Viewdidload { + [Super Viewdidload]; -     //additional setup after loading the view, typically from a nib. +      A     //3. Create a URL object that specifies the URL of the requested data, this section calls the public API of Facebook to get an FB user information.  atNsurl *url = [Nsurl urlwithstring:@"HTTPS://GRAPH.FACEBOOK.COM/APPLE-INC"]; -     //4. Create a network Request object from the URL, -     //parameter 1: request access Path -     //Parameter 2: Cache protocol -     //Parameter 3: Network request time-out -Nsurlrequest *request = [[Nsurlrequest alloc] Initwithurl:url cachepolicy:nsurlrequestuseprotocolcachepolicy timeOutInterval:Ten]; in     //5. Use network objects for network communication, create a network connection when the network Request object is created successfully.  -Nsurlconnection *connection = [[Nsurlconnection alloc] Initwithrequest:requestDelegate: self]; to      +      - } the  * //6. Add an agent method that executes this method when the network feedback is received.  $-(void) Connection: (Nsurlconnection *) connection didreceiveresponse: (Nsurlresponse *) ResponsePanax Notoginseng { -Self.receivedata =[Nsmutabledata data]; the } +  A //7. Add a proxy method that executes this method when the network data is received the-(void) Connection: (Nsurlconnection *) connection didreceivedata: (NSData *) Data + { -Self.receivedata =data; $ } $  - //8. Add an agent method that executes this method when a series of actions for the network connection are completed.  --(void) Connectiondidfinishloading: (Nsurlconnection *) Connection the { -     //Converts the received network data, from the binary data format, to the string format, and outputs the resultWuyiNSString *receivestr =[[NSString alloc]initwithdata:self.receivedata encoding:nsutf8stringencoding]; theNSLog (@">>>>>>>>>>>>>>>>%@", receivestr); - } Wu  - //9. Add a proxy method when the network connection fails to execute this method About-(void) Connection: (Nsurlconnection *) connection didfailwitherror: (Nserror *) Error $ { -NSLog (@">>>>>>>>>>>>>>>>%@", [Error localizeddescription]); - } -  A- (void) didreceivememorywarning { + [Super didreceivememorywarning]; the     //Dispose of any resources the can be recreated. - } $  the  the  the @end

After execution, the data can be obtained based on the specified URL.

IOS network with multithreaded--3. Network request with asynchronous get mode (non-blocking)