IOS网络第二天 - 03-JSON显示数据，调用本地视频播放，数据转模型

********HMVideosViewController.m

#import "HMVideosViewController.h"
#import "MBProgressHUD+MJ.h"
#import "HMVideo.h"
#import "UIImageView+WebCache.h"
#import <MediaPlayer/MediaPlayer.h>

#define HMUrl(path) [NSURL URLWithString:[NSString stringWithFormat:@"http://localhost:8080/MJServer/%@", path]]

@interface HMVideosViewController ()
@property (nonatomic, strong) NSMutableArray *videos;
@end

@implementation HMVideosViewController

- (NSMutableArray *)videos
{
    if (!_videos) {
        self.videos = [[NSMutableArray alloc] init];
    }
    return _videos;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    /**
     加载服务器最新的视频信息
     */

    // 1.创建URL
    NSURL *url = HMUrl(@"video");

    // 2.创建请求
    NSURLRequest *request = [NSURLRequest requestWithURL:url];

    // 3.发送请求
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
        if (connectionError || data == nil) {
            [MBProgressHUD showError:@"网络繁忙，请稍后再试！"];
            return;
        }

        // 解析JSON数据
        NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
        NSArray *videoArray = dict[@"videos"];
        for (NSDictionary *videoDict in videoArray) {
            HMVideo *video = [HMVideo videoWithDict:videoDict];
            [self.videos addObject:video];
        }

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

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

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *ID = @"video";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];
    if (!cell) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:ID];
    }

    HMVideo *video = self.videos[indexPath.row];

    cell.textLabel.text = video.name;
    cell.detailTextLabel.text = [NSString stringWithFormat:@"时长 : %d 分钟", video.length];

    // 显示视频截图
    NSURL *url = HMUrl(video.image);
    [cell.imageView sd_setImageWithURL:url placeholderImage:[UIImage imageNamed:@"placehoder"]];

    return cell;
}

#pragma mark - 代理方法
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    // 1.取出对应的视频模型
    HMVideo *video = self.videos[indexPath.row];

    // 2.创建系统自带的视频播放控制器
    NSURL *url = HMUrl(video.url);
    MPMoviePlayerViewController *playerVc = [[MPMoviePlayerViewController alloc] initWithContentURL:url];

    // 3.显示播放器
    [self presentViewController:playerVc animated:YES completion:nil];
}
@end

************HMVideosViewController.h

#import <UIKit/UIKit.h>

@interface HMVideosViewController : UITableViewController

@end

***********模型m

#import "HMVideo.h"

@implementation HMVideo
+ (instancetype)videoWithDict:(NSDictionary *)dict
{
    HMVideo *video = [[self alloc] init];
    [video setValuesForKeysWithDictionary:dict];
    return video;
}
@end

***********模型h

#import <Foundation/Foundation.h>

@interface HMVideo : NSObject
/**
 *  ID
 */
@property (nonatomic, assign) int id;
/**
 *  时长
 */
@property (nonatomic, assign) int length;

/**
 *  图片（视频截图）
 */
@property (nonatomic, copy) NSString *image;

/**
 *  视频名字
 */
@property (nonatomic, copy) NSString *name;

/**
 *  视频的播放路径
 */
@property (nonatomic, copy) NSString *url;

+ (instancetype)videoWithDict:(NSDictionary *)dict;
@end