iOS 开发 解决UICollectionView的多组头部视图样式不一样复用时发生错乱问题

// 防止cell和头部视图复用出现错乱
[collectionView registerClass:[WOCOHomeSelectTypeCell class] forCellWithReuseIdentifier:@"selectTypeCell"];
[collectionView registerClass:[WOCOHomeDisplayCell class] forCellWithReuseIdentifier:@"displayCell"];
[collectionView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"headerSelectType"];
[collectionView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"headerDisplay"];

// 返回每一组的头部或尾部视图
- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath {

// 1.定义重用标识
static NSString *ID;

if (indexPath.section == 0) {
ID = @"headerSelectType";
} else {
ID = @"headerDisplay";
}

UICollectionReusableView *reusableView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:ID forIndexPath:indexPath];

if (indexPath.section == 0) {
// 网络加载 --- 创建带标题的图片轮播器

// 防止复用时反复创建对象
if (self.cycleScrollView == nil) {
self.cycleScrollView = [SDCycleScrollView cycleScrollViewWithFrame:CGRectMake(0, 0, KUIScreenWidth, 180) delegate:self placeholderImage:nil];

self.cycleScrollView.pageControlAliment = SDCycleScrollViewPageContolAlimentRight;
self.cycleScrollView.currentPageDotColor = [UIColor whiteColor]; // 自定义分页控件小圆标颜色
[reusableView addSubview:self.cycleScrollView];

// --- 模拟加载延迟
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.3 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
self.cycleScrollView.imageURLStringsGroup = self.imagesURLStringArr;
});
}

} else {
// 防止复用时反复创建对象
if (self.lineView == nil) {
UIImageView *lineView = [[UIImageView alloc] init];
lineView.backgroundColor = [UIColor blackColor];
self.lineView = lineView;

[reusableView addSubview:lineView];

[lineView mas_makeConstraints:^(MASConstraintMaker *make) {
make.centerY.mas_equalTo(reusableView.mas_centerY);
make.left.mas_equalTo(reusableView.mas_left).offset(10);
make.height.mas_equalTo(20);
make.width.mas_equalTo(3);
}];
}
// 防止复用时反复创建对象
if (self.tipLabel == nil) {
UILabel *tipLabel = [[UILabel alloc] init];
tipLabel.text = @"定制精选";
tipLabel.textColor = [UIColor blackColor];
self.tipLabel = tipLabel;

[reusableView addSubview:tipLabel];

[tipLabel mas_makeConstraints:^(MASConstraintMaker *make) {
make.centerY.mas_equalTo(reusableView.mas_centerY);
make.left.mas_equalTo(self.lineView.mas_right).offset(10);
}];
}
}
return reusableView;
}