iOS GDataXML（基于libxml2库）

1、GDataXML配置

• 在Other Linker Flags中加入-lxml2

配置1.png

• 在Head Search Path中加入/usr/include/libxml2

配置2.png

• 设置非ARC标记

设置非ARC标记.png

2、GDataXML的具体用法

// 加载整个文档
GDataXMLDocument *doc = [[GDataXMLDocument alloc] initWithData:data options:0 error:nil];

// 获得根节点
doc.rootElement;

// 获得其他节点
[element elementsForName:@"video"];

// 获得节点的属性
[element attributeForName:@"name"].stringValue;

3、GDataXML解析小案例

#import "ViewController.h"
#import 
#import 
#import "XMGVideo.h"
#import 
#import "GDataXMLNode.h"

@interface ViewController ()

@property (nonatomic, strong) NSMutableArray *videos; /**< 视屏信息 */

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    // 只需要在字典转模型之前, 告诉框架要将模型中的哪个属性和字典中的哪个KEY对应
    [XMGVideo setupReplacedKeyFromPropertyName:^NSDictionary *{
        return @{@"ID":@"id"};
    }];

    self.tableView.rowHeight = 150;
    // Do any additional setup after loading the view, typically from a nib.
    NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/video?type=XML"];
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {

        // 1.创建解析器
        GDataXMLDocument *document = [[GDataXMLDocument alloc] initWithData:data options:kNilOptions error:nil];
        // 2.获取根元素
        GDataXMLElement *rootElement = document.rootElement;
        // 3.从根元素中获取所有子元素
        NSArray *elements = [rootElement elementsForName:@"video"];
        // 4.遍历子元素, 取出属性转换为模型
        for (GDataXMLElement *element in elements) {
            XMGVideo *video = [[XMGVideo alloc] init];
            video.ID = @([element attributeForName:@"id"].stringValue.integerValue);
            video.image = [element attributeForName:@"image"].stringValue;
            video.url = [element attributeForName:@"url"].stringValue;
            video.name = [element attributeForName:@"name"].stringValue;
            video.length = @([element attributeForName:@"length"].stringValue.integerValue);
            [self.videos addObject:video];

        }

        // 5.刷新表格
        [self.tableView reloadData];
    }];
}

#pragma mark - datasource
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return self.videos.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    // 1.创建cell
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];

    // 2.取出对应行的字典
    XMGVideo *video = self.videos[indexPath.row];
    // 2.1设置数据
    cell.textLabel.text = video.name;
    cell.detailTextLabel.text = [NSString stringWithFormat:@"时长:%@", video.length];
    NSString *urlStr = [NSString stringWithFormat:@"http://120.25.226.186:32812/%@", video.image];
    urlStr = [urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    [cell.imageView sd_setImageWithURL:[NSURL URLWithString:urlStr] placeholderImage:nil];

    // 3.返回cell
    return cell;
}


- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    // 1.取出选中行对应的字典
    XMGVideo *video = self.videos[indexPath.row];
    // 2.根据字典中的URL属性拼接视屏的地址
    NSString *urlStr = [NSString stringWithFormat:@"http://120.25.226.186:32812/%@", video.url];
    urlStr = [urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    NSURL *url = [NSURL URLWithString:urlStr];
    // 3.播放视屏
    MPMoviePlayerViewController *vc = [[MPMoviePlayerViewController alloc] initWithContentURL:url];
    // 4.显示控制器
    [self presentViewController:vc animated:YES completion:nil];
}

#pragma mark - lazy
- (NSMutableArray *)videos
{
    if (!_videos) {
        _videos = [NSMutableArray array];
    }
    return _videos;
}
@end