[iOS多线程&网络-2.3]-解析xml

  1 //  2 //  HVWVideoViewController.m  3 //  ParseXMLDemo  4 //  5 //  Created by hellovoidworld on 15/1/26.  6 //  Copyright (c) 2015年 hellovoidworld. All rights reserved.  7 //  8   9 #import "HVWVideoViewController.h" 10 #import "HVWVideo.h" 11 #import "HVWVideoCell.h" 12  13 @interface HVWVideoViewController () <UITableViewDataSource, UITableViewDelegate, NSURLConnectionDataDelegate, NSXMLParserDelegate> 14  15 /** 缓存数据 */ 16 @PRoperty(nonatomic, strong) NSMutableData *data; 17  18 /** 缓存视频信息 */ 19 @property(nonatomic, strong) NSMutableArray *videos; 20  21 @end 22  23 @implementation HVWVideoViewController 24  25 - (void)viewDidLoad { 26     [super viewDidLoad]; 27     28     // 发送请求 29     NSURL *url = [NSURL URLWithString:@"http://192.168.0.21:8080/MyTestServer/video?type=xml"]; 30     NSURLRequest *request = [NSURLRequest requestWithURL:url]; 31     NSURLConnection *conn = [NSURLConnection connectionWithRequest:request delegate:self]; 32     [conn start]; 33 } 34  35 #pragma mark - Table view data source 36  37 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { 38     return 1; 39 } 40  41 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { 42     return self.videos.count; 43 } 44  45 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 46     HVWVideoCell *cell = [HVWVideoCell cellWithTableView:tableView]; 47     cell.video  = self.videos[indexPath.row]; 48     return cell; 49 } 50  51 #pragma mark - UITableViewDelegate 52 - (CGFloat) tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { 53     return 70; 54 } 55  56  57 #pragma mark - NSURLConnectionDataDelegate 58 - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { 59     NSLog(@"网络繁忙，请稍后再试!"); 60 } 61  62 - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { 63     NSLog(@"开始接受数据"); 64     self.data = [NSMutableData data]; 65 } 66  67 - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { 68     NSLog(@"正在接受数据 ---> 数据长度:%d byte", data.length); 69     70     // 累加数据 71     [self.data appendData:data]; 72 } 73  74 - (void)connectionDidFinishLoading:(NSURLConnection *)connection { 75     NSLog(@"完成下载数据"); 76     77     // 开始处理数据 78     NSXMLParser *parser = [[NSXMLParser alloc] initWithData:self.data]; 79     parser.delegate = self; 80     // 开始解析 81     [parser parse]; 82 } 83  84 #pragma mark - NSXMLParserDelegate 85 /** xml文档开始 */ 86 - (void)parserDidStartDocument:(NSXMLParser *)parser { 87     NSLog(@"开始解析xml"); 88 } 89  90 /** xml文档结束 */ 91 - (void)parserDidEndDocument:(NSXMLParser *)parser { 92     NSLog(@"解析xml完毕"); 93 } 94  95 /** 开始解析元素 */ 96 - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict { 97     NSLog(@"开始解析 %@", elementName); 98     99     if ([@"videos" isEqualToString:elementName]) { // 这个也会解析到根节点100         self.videos = [NSMutableArray array];101     } else if ([@"video" isEqualToString:elementName]) { // 如果是视频节点，开始提取102         HVWVideo *video = [HVWVideo videoWithDict:attributeDict];103        [self.videos addObject:video];104     }105 }106 107 /** 结束解析元素 */108 - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {109     NSLog(@"解析完毕 %@", elementName);110    111     // 刷新数据112     [self.tableView reloadData];113 }114 115 @end

 1 - (void)connectionDidFinishLoading:(NSURLConnection *)connection { 2     NSLog(@"完成下载数据"); 3     4     // 开始处理数据 5     // 1.加载文档 6     GDataXMLDocument *doc = [[GDataXMLDocument alloc] initWithData:self.data options:0 error:nil]; 7     8     // 2.获得根元素 9     GDataXMLElement *root = [doc rootElement];10    11     // 3.解析出所有元素12     NSArray *elements = [root elementsForName:@"video"];13    14     // 4.封装数据15     self.videos = [NSMutableArray array];16     for (GDataXMLElement *ele in elements) {17         HVWVideo *video = [[HVWVideo alloc] init];18         video.name = [ele attributeForName:@"name"].stringValue;19         video.length = [ele attributeForName:@"length"].stringValue;20         video.image = [ele attributeForName:@"image"].stringValue;21         video.video = [ele attributeForName:@"video"].stringValue;22         [self.videos addObject:video];23     }24    25     // 刷新数据26     [self.tableView reloadData];27 }