查詢QQ是否在線(SOAP)

 今天作了個查詢QQ是否在線的，效果圖以下，

http://webservice.webxml.com.cn/webservices/qqOnlineWebService.asmx

得到騰訊QQ在線狀態

輸入參數：QQ號碼 String，默認QQ號碼：8698053。返回數據：String，Y = 在線；N = 離線；E = QQ號碼錯誤；A = 商業用戶驗證失敗；V = 免費用戶超過數量

查詢結果沒有設置爲在線等，仍是Y，這個用switch就能夠了，或者寫一個專門的類用來反饋結果

 

 

 在xib中設置如上圖，textfiled的鍵盤設置爲數字鍵盤

 

 

聲明文件內容                                                            

#import <UIKit/UIKit.h>

 

@interface YUViewController : UIViewController<NSXMLParserDelegate,NSURLConnectionDelegate>//前者用來解析XML，後者用於網絡鏈接

@property (weak, nonatomic) IBOutlet UITextField *qq;

- (IBAction)doQuery:(id)sender;

 

@property (strong, nonatomic) NSMutableData *webData;

@property (strong, nonatomic) NSMutableString *soapResults;

@property (strong, nonatomic) NSXMLParser *xmlParser;

@property (nonatomic) BOOL elementFound;

@property (strong, nonatomic) NSString *matchingElement;

@property (strong, nonatomic) NSURLConnection *conn;

 

@end

 

 

//SOAP是簡單對象訪問協議，它可當作是HTTP與XML的結合，其中XML部分是做爲HTTP報文的實體主體部分。具體信息能夠參考百度

//在iOS中使用SOAP，須要咱們本身組裝XML格式的字符串，當XML字符串比較長的時候會變得很麻煩。另外，咱們在寫XML格式的字符串時也要常常使用轉義字符「\」。這個是服務提供方 www.webxml.com.cn

 

實現文件內容                                          

//

// YUViewController.m

// atQQ

//

// Created by chen on 3/9/13.

// Copyright (c) 2013 IOSCHEN. All rights reserved.

//

 

#import "YUViewController.h"

 

@interface YUViewController ()

 

@end

 

@implementation YUViewController

@synthesize webData;

@synthesize soapResults;

@synthesize xmlParser;

@synthesize elementFound;

@synthesize matchingElement;

@synthesize conn;

- (void)viewDidLoad

{

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

}

 

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

// 開始查詢

- (IBAction)doQuery:(id)sender

{

    NSString *number =_qq.text;

    // 設置咱們以後解析XML時用的關鍵字，與響應報文中Body標籤之間的qqCheckOnlineResult標籤對應

    matchingElement = @"qqCheckOnlineResult";

    // 建立SOAP消息，內容格式就是網站上提示的請求報文的實體主體部分

    NSString *soapMsg = [NSString stringWithFormat:

                         @"<?xml version=\"1.0\" encoding=\"utf-8\"?>"

                         "<soap12:Envelope "

                         "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" "

                         "xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" "

                         "xmlns:soap12=\"http://www.w3.org/2003/05/soap-envelope\"> "

                         "<soap12:Body>"

                         "<qqCheckOnline xmlns=\"http://WebXml.com.cn/\">"

                         "<qqCode>%@</qqCode>"

                         "</qqCheckOnline>"

                         "</soap12:Body>"

                         "</soap12:Envelope>", number];

    // 將這個XML字符串打印出來

    NSLog(@"%@", soapMsg);

    // 建立URL，內容是前面的請求報文報文中第二行主機地址加上第一行URL字段

    NSURL *url = [NSURL URLWithString: @"http://webservice.webxml.com.cn/webservices/qqOnlineWebService.asmx"];

    // 根據上面的URL建立一個請求

    NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:url];

    NSString *msgLength = [NSString stringWithFormat:@"%d", [soapMsg length]];

    // 添加請求的詳細信息，與請求報文前半部分的各字段對應

    [req addValue:@"application/soap+xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];

    [req addValue:msgLength forHTTPHeaderField:@"Content-Length"];

    // 設置請求行方法爲POST，與請求報文第一行對應

    [req setHTTPMethod:@"POST"];

    // 將SOAP消息加到請求中

    [req setHTTPBody: [soapMsg dataUsingEncoding:NSUTF8StringEncoding]];

    // 建立鏈接

    conn = [[NSURLConnection alloc] initWithRequest:req delegate:self];

    if (conn) {

        webData = [NSMutableData data];

    }

   

    [_qq resignFirstResponder];

}

 

#pragma mark -

#pragma mark URL Connection Data Delegate Methods

 

// 剛開始接受響應時調用

-(void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *) response{

    [webData setLength: 0];

}

 

// 每接收到一部分數據就追加到webData中

-(void) connection:(NSURLConnection *)connection didReceiveData:(NSData *) data {

    [webData appendData:data];

}

 

// 出現錯誤時

-(void) connection:(NSURLConnection *)connection didFailWithError:(NSError *) error {

    conn = nil;

    webData = nil;

}

 

// 完成接收數據時調用

-(void) connectionDidFinishLoading:(NSURLConnection *) connection {

    NSString *theXML = [[NSString alloc] initWithBytes:[webData mutableBytes]

                                                length:[webData length]

                                              encoding:NSUTF8StringEncoding];

   

    // 打印出獲得的XML

    NSLog(@"%@", theXML);

    // 使用NSXMLParser解析出咱們想要的結果

    xmlParser = [[NSXMLParser alloc] initWithData: webData];

    [xmlParser setDelegate: self];

    [xmlParser setShouldResolveExternalEntities: YES];

    [xmlParser parse];

}

 

#pragma mark -

#pragma mark XML Parser Delegate Methods

 

// 開始解析一個元素名

-(void) parser:(NSXMLParser *) parser didStartElement:(NSString *) elementName namespaceURI:(NSString *) namespaceURI qualifiedName:(NSString *) qName attributes:(NSDictionary *) attributeDict {

    if ([elementName isEqualToString:matchingElement]) {

        if (!soapResults) {

            soapResults = [[NSMutableString alloc] init];

        }

        elementFound = YES;

    }

}

 

// 追加找到的元素值，一個元素值可能要分幾回追加

-(void)parser:(NSXMLParser *) parser foundCharacters:(NSString *)string {

    if (elementFound) {

        [soapResults appendString: string];

    }

}

 

// 結束解析這個元素名

-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {

    if ([elementName isEqualToString:matchingElement]) {

        UIAlertView *alert= [[UIAlertView alloc] initWithTitle:@"QQ是否在線"

                                                       message:[NSString stringWithFormat:@"%@", soapResults]

                                                      delegate:self

                                             cancelButtonTitle:@"肯定"

                                             otherButtonTitles:nil];

        [alert show];

        elementFound = FALSE;

        // 強制放棄解析

        [xmlParser abortParsing];

       

        soapResults=nil;//防止查詢兩次的時候顯示了兩次的結果

    }

}

 

// 解析整個文件結束後

- (void)parserDidEndDocument:(NSXMLParser *)parser {

    if (soapResults) {

        soapResults = nil;

    }

}

 

// 出錯時，例如強制結束解析

- (void) parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError {

    if (soapResults) {

        soapResults = nil;

    }

}

@end

參考博文 http://my.oschina.net/plumsoft/blog/75277