支持更多音视频格式，添加点播测试页面

Example/SellyCloudSDK/Controllers/VOD/AVVodListViewController.m

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+//
+//  AVVodListViewController.m
+//  SellyCloudSDK_Example
+//
+
+#import "AVVodListViewController.h"
+#import "AVVodItemModel.h"
+#import "AVVodItemCell.h"
+#import "AVLiveStreamModel.h"
+#import "SCVodVideoPlayerViewController.h"
+#import "AVConstants.h"
+#import <Masonry/Masonry.h>
+
+@interface AVVodListViewController () <UICollectionViewDelegate, UICollectionViewDataSource>
+@property (nonatomic, strong) UICollectionView *collectionView;
+@property (nonatomic, strong) NSArray<AVVodItemModel *> *vodItems;
+@end
+
+@implementation AVVodListViewController
+
+static NSString * const kVodItemCellIdentifier = @"VodItemCell";
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.view.backgroundColor = [UIColor systemBackgroundColor];
+    self.title = @"点播测试";
+
+    self.vodItems = @[];
+    [self setupCollectionView];
+    [self fetchVodList];
+}
+
+#pragma mark - Network
+
+- (void)fetchVodList {
+    NSURL *url = [NSURL URLWithString:@"http://rtmp.sellycloud.io:8089/live/sdk/demo/vodlist"];
+    NSURLSessionDataTask *task = [NSURLSession.sharedSession dataTaskWithURL:url completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
+        if (error || !data) {
+            NSLog(@"fetchVodList failed: %@", error);
+            return;
+        }
+        NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
+        if (![json isKindOfClass:NSDictionary.class]) return;
+
+        NSMutableArray<AVVodItemModel *> *items = [NSMutableArray array];
+        [json enumerateKeysAndObjectsUsingBlock:^(NSString *type, NSString *vodUrl, BOOL *stop) {
+            AVVodItemModel *item = [AVVodItemModel modelWithUrl:vodUrl
+                                                          cover:@""
+                                                          title:[NSString stringWithFormat:@"%@ 测试", type.uppercaseString]
+                                                           type:type];
+            [items addObject:item];
+        }];
+
+        dispatch_async(dispatch_get_main_queue(), ^{
+            self.vodItems = items.copy;
+            [self.collectionView reloadData];
+        });
+    }];
+    [task resume];
+}
+
+#pragma mark - Setup UI
+
+- (void)setupCollectionView {
+    UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];
+    layout.scrollDirection = UICollectionViewScrollDirectionVertical;
+    layout.minimumInteritemSpacing = 12;
+    layout.minimumLineSpacing = 16;
+    layout.sectionInset = UIEdgeInsetsMake(16, 16, 16, 16);
+
+    self.collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:layout];
+    self.collectionView.backgroundColor = [UIColor systemBackgroundColor];
+    self.collectionView.delegate = self;
+    self.collectionView.dataSource = self;
+    self.collectionView.alwaysBounceVertical = YES;
+    [self.collectionView registerClass:[AVVodItemCell class] forCellWithReuseIdentifier:kVodItemCellIdentifier];
+
+    [self.view addSubview:self.collectionView];
+    [self.collectionView mas_makeConstraints:^(MASConstraintMaker *make) {
+        make.top.equalTo(self.view.mas_safeAreaLayoutGuideTop);
+        make.left.right.bottom.equalTo(self.view);
+    }];
+}
+
+#pragma mark - UICollectionViewDataSource
+
+- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
+    return self.vodItems.count;
+}
+
+- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
+    AVVodItemCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:kVodItemCellIdentifier forIndexPath:indexPath];
+    [cell configureWithModel:self.vodItems[indexPath.item]];
+    return cell;
+}
+
+#pragma mark - UICollectionViewDelegateFlowLayout
+
+- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)layout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
+    CGFloat totalHorizontalPadding = 16 * 2 + 12;
+    CGFloat availableWidth = collectionView.bounds.size.width - totalHorizontalPadding;
+    CGFloat itemWidth = availableWidth / 2.0;
+    CGFloat thumbnailHeight = itemWidth * (9.0 / 16.0);
+    CGFloat itemHeight = thumbnailHeight + 6 + 18 + 6; // thumbnail + spacing + title (1 line) + bottom
+    return CGSizeMake(itemWidth, itemHeight);
+}
+
+#pragma mark - UICollectionViewDelegate
+
+- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
+    [collectionView deselectItemAtIndexPath:indexPath animated:YES];
+
+    AVVodItemModel *item = self.vodItems[indexPath.item];
+
+    // Convert to AVLiveStreamModel for the player
+    AVLiveStreamModel *stream = [[AVLiveStreamModel alloc] init];
+    stream.url = item.url;
+
+    SCVodVideoPlayerViewController *vc = [[SCVodVideoPlayerViewController alloc] initWithLiveStream:stream];
+    vc.hidesBottomBarWhenPushed = YES;
+    vc.modalPresentationStyle = UIModalPresentationFullScreen;
+    [self.navigationController pushViewController:vc animated:YES];
+}
+
+#pragma mark - Orientation Support
+
+- (BOOL)shouldAutorotate {
+    return YES;
+}
+
+- (UIInterfaceOrientationMask)supportedInterfaceOrientations {
+    return UIInterfaceOrientationMaskPortrait;
+}
+
+- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
+    return UIInterfaceOrientationPortrait;
+}
+
+@end