UICollectionViewDelegate, UICollectionViewDataSource实现了这两个代理
//collectionview相关
```
AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:[NSURL URLWithString:musicUrl] options:nil];
AVPlayerItem *songitem = [[AVPlayerItem alloc] initWithAsset:asset];
self.player = [[AVPlayer alloc] initWithPlayerItem:songitem];
[songitem addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew context:nil];
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context {
if ([keyPath isEqualToString:@"status"]) {
AVPlayerItem *item = (AVPlayerItem *)object;
//AVPlayerItemStatus *status = item.status;
if (item.status == AVPlayerItemStatusReadyToPlay) {
[self.player play];
//对播放界面的一些操作，时间、进度等
}
}
}
```
记得在info设置NSAppTransportSecurity - NSAllowsArbitraryLoads - yes
AVAudioPlayer只可播放本地音频，不能播放网络音频
- (void)setCollectionviewLayout {
UICollectionViewFlowLayout *flow = [[UICollectionViewFlowLayout alloc] init];
[flow setScrollDirection:UICollectionViewScrollDirectionVertical];//竖直滑动
// flow.minimumLineSpacing = 0;
// flow.minimumInteritemSpacing = 0;
flow.itemSize = CGSizeMake(75, 120);
self.typeCollection = [[UICollectionView alloc] initWithFrame:CGRectMake(15, 0, Screen_Width-30, Screen_Height-49-64) collectionViewLayout:flow];
self.typeCollection.backgroundColor = [UIColor clearColor];
self.typeCollection.delegate = self;
self.typeCollection.dataSource = self;
self.typeCollection.showsHorizontalScrollIndicator = NO;
self.typeCollection.showsVerticalScrollIndicator = NO;
[self.typeCollection registerNib:[UINib nibWithNibName:@"TypeCell" bundle:nil] forCellWithReuseIdentifier:@"TypeCell"];//注册cell
[self.view addSubview:self.typeCollection];
[self.typeCollection registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"header"];//注册分区头
}
#pragma mark - collection
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
return 2;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
// return self.treeList.count;
return 9;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
TypeCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"TypeCell" forIndexPath:indexPath];
// [cell setDateWithString:self.treeList[indexPath.row]];
return cell;
}
//返回分区header
- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath {
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, Screen_Width, 30)];
label.text = @"header";
UICollectionReusableView *view = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"header" forIndexPath:indexPath];
[view addSubview:label];
return view;
}
//分区header的大小
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section {
return CGSizeMake(Screen_Width, 30);
}
