IOS Network Programming code

Viewcontroller.m

16_ Network Programming

Created by lanou3g on 14-12-19.

Copyright (c) 2014 MXT. All rights reserved.

#import "ViewController.h"

#define BASE_URL @ "http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx?date=20131129 &startrecord=1&len=5&udid=1234567890&terminaltype=iphone&cid=213 "

#define BASE_POST_URL @ "Http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx?"

#define POST @ "date=20131129&startrecord=1&len=5&udid=1234567890&terminaltype=iphone&cid=213 "

@interface Viewcontroller () <NSURLConnectionDataDelegate>

@property (Nonatomic,retain) Nsmutabledata *mutadata;

@end

@implementation Viewcontroller

-(void) Viewdidload {

[Super Viewdidload];

Additional setup after loading the view, typically from a nib.

}

/*

Different points:

1, transfer data to the server mode:

GET: Through URL string.

POST: Via Data

2, the size of the transmitted data:

GET: URL string up to 255 bytes.

POST: Use NSData, capacity over 1G

3. Security:

GET: All data transmitted to the server, displayed in the URL, similar to the password of the Ming input, directly visible.

POST: Data is turned into nsdata (binary data), similar to the secret input of the password, cannot be read directly

*/

GET Synchronization

-(Ibaction) Getsyncbutton: (ID) Sender {

1, create URL

Nsurl *url = [Nsurl Urlwithstring:base_url];

2, create Nsurlrequest Request object

Nsmutableurlrequest *request = [Nsmutableurlrequest Requestwithurl:url];

2, 1

[Request sethttpmethod:@ "GET"];

3, return result object: Return value information

Nsurlresponse *response = nil;

Nserror *error = nil;

4. Create a linked object nsurlconnection

NSData *data = [nsurlconnection sendsynchronousrequest:request returningresponse:&response error:&error];

NSLog (@ "return type%@", response);//Print return value information

NSLog (@ "--------------------%@", data);

6 parsing

Nsdictionary *dic = [nsjsonserialization jsonobjectwithdata:data options:nsjsonreadingmutablecontainers Error:nil];

NSLog (@ "+++++++++%@", DIC);

NSLog (@ "%@", [dic valueforkey:@ "News"]);

}

Post synchronization

-(Ibaction) Postsyncbutton: (ID) Sender {

1, create URL

Nsurl *url = [Nsurl Urlwithstring:base_post_url];

Set the parameters in the request body to encode

NSString *post = [NSString stringwithformat:post];

NSData *postdata = [post datausingencoding:nsutf8stringencoding];

2, create the Nsurlrequest request object (mutable because you want to set the parameter)

Nsmutableurlrequest *request = [Nsmutableurlrequest Requestwithurl:url];

2,1

[Request sethttpmethod:@ "POST"];

[Request Sethttpbody:postdata];

nserror *error = nil;

3. Create a linked object Nsurlconnection (sync does not set proxy)

NSData *data = [nsurlconnection sendsynchronousrequest:request returningresponse:nil error:&error];

//NSLog (@ "--------------------%@", data);

6 parsing

Nsdictionary *dic = [nsjsonserialization jsonobjectwithdata:data options:nsjsonreadingmutablecontainers Error:nil];

NSLog (@ "+++++++++%@", DIC);

NSLog (@ "%@", [dic valueforkey:@ "News"]);

}

/*

There are two implementations of asynchronous joins:

1, set proxy, receive data

2, implementing block (multi-threaded)

*/

Get Async

-(Ibaction) Getasyncbutton: (ID) Sender {

Get Async + Block

1, create URL

Nsurl *url = [Nsurl Urlwithstring:base_url];

2, create Nsurlrequest Request object

Nsmutableurlrequest *request = [Nsmutableurlrequest Requestwithurl:url];

2,1

[Request sethttpmethod:@ "GET"];

Create an action queue

Nsoperationqueue *queue = [[Nsoperationqueue alloc] init];

3, create the linked object Nsurlconnection (parse within block)

__block Viewcontroller *weakself = self;

[Nsurlconnection sendasynchronousrequest:request queue:queue completionhandler:^ (NSURLResponse *response, NSData * Data, Nserror *connectionerror) {

3,1 parsing

Nsdictionary *dic = [nsjsonserialization jsonobjectwithdata:data options:nsjsonreadingmutablecontainers Error:nil];

NSLog (@ "+++++++++%@", DIC);

Never update the UI on a child thread

Dispatch_async (Dispatch_get_main_queue (), ^{

Back to the main thread update UI

WeakSelf.textView.text = [NSString stringwithformat:@ "%@", DIC];

});

}];

NSLog (@ ">>>>>>>>>>>>>>><<<>>%lu", _ Textview.retaincount);

[Queue release];

/*

1, create URL

Nsurl *url = [Nsurl Urlwithstring:base_url];

2, create Nsurlrequest Request object

Nsmutableurlrequest *request = [Nsmutableurlrequest Requestwithurl:url];

2,1

[Request sethttpmethod:@ "GET"];

3. Create a linked object Send request settings Agent

[Nsurlconnection connectionwithrequest:request delegate:self];

*/

}

#pragma mark-nsurlconnectiondatadelegate

Start accepting

-(void) connection: (Nsurlconnection *) connection didreceiveresponse: (Nsurlresponse *) respons

{

NSLog (@ "Start accepting");

Self.mutadata = [Nsmutabledata data];

NSLog (@ "%lu", _mutadata.retaincount);

}

Accept Data

-(void) connection: (Nsurlconnection *) connection didreceivedata: (NSData *) data

{

NSLog (@ "---------accept data");

[Self.mutadata Appenddata:data];

}

Acceptance complete

-(void) connectiondidfinishloading: (nsurlconnection *) connection

{

NSLog (@ "+ + accepted");

Analytical

Nsdictionary *dic = [nsjsonserialization jsonobjectwithdata:_mutadata options:nsjsonreadingmutablecontainers Error: NIL];

NSLog (@ "%@", DIC);

}

-(void) connection: (Nsurlconnection *) connection didfailwitherror: (Nserror *) error

{

NSLog (@ "error");

}

POST Async

-(Ibaction) Postasyncbutton: (ID) Sender {

1, create URL

Nsurl *url = [Nsurl Urlwithstring:base_post_url];

Set the parameters in the request body to encode

NSString *post = [NSString stringwithformat:post];

NSData *postdata = [post datausingencoding:nsutf8stringencoding];

2, create the Nsurlrequest request object (mutable because you want to set the parameter)

Nsmutableurlrequest *request = [Nsmutableurlrequest Requestwithurl:url];

2,1

[Request sethttpmethod:@ "POST"];

[Request Sethttpbody:postdata];

Create an action queue

Nsoperationqueue *queue = [[Nsoperationqueue alloc] init];

3, create the linked object Nsurlconnection (parse within block)

__block Viewcontroller *weakself = self;

[Nsurlconnection sendasynchronousrequest:request queue:queue completionhandler:^ (NSURLResponse *response, NSData * Data, Nserror *connectionerror) {

3,1 parsing

Nsdictionary *dic = [nsjsonserialization jsonobjectwithdata:data options:nsjsonreadingmutablecontainers Error:nil];

NSLog (@ "+++++++++%@", DIC);

Never update the UI on a child thread

Dispatch_async (Dispatch_get_main_queue (), ^{

Back to the main thread update UI

WeakSelf.textView.text = [NSString stringwithformat:@ "%@", DIC];

});

}];

NSLog (@ ">>>>>>>>>>>>>>><<<>>%lu", _ Textview.retaincount);

[Queue release];

}

-(void) dealloc

{

[_mutadata release];

[_textview release];

[Super Dealloc];

}

-(void) didreceivememorywarning {

[Super didreceivememorywarning];

Dispose of any resources the can be recreated.

}

@end

IOS Network Programming code