ios列表布局三方库--SwipeTableView

- (UIScrollView *)swipeTableView:(SwipeTableView *)swipeView viewForItemAtIndex:(NSInteger)index reusingView:(UIScrollView *)view {
   ...
   STRefreshHeader * header = scrollView.header;
   header.y = - (header.height + (swipeHeaderView.height + swipeHeaderBar.height));
   ...
}


or


- (instancetype)initWithFrame:(CGRect)frame {
   ...
   STRefreshHeader * header = [STRefreshHeader headerWithRefreshingBlock:^(STRefreshHeader *header) {

}];
   header.y = - (header.height + (swipeHeaderView.height + swipeHeaderBar.height)); 
   scrollView.header = header;
   ...
}

对于一些下拉刷新控件，RefreshHeader的frame设置可能会在layoutSubviews中，所以，对RefreshHeader frame的修改,需要等执行完layouSubviews之后，在 有效的方法 中操作，比如：

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    STRefreshHeader * header = self.header;
    CGFloat orginY = - (header.height + self.swipeTableView.swipeHeaderView.height + self.swipeTableView.swipeHeaderBar.height);
    if (header.y != orginY) {
        header.y = orginY;
    }
}

初始化并设置header与bar

self.swipeTableView = [[SwipeTableView alloc]initWithFrame:[UIScreen mainScreen].bounds];
_swipeTableView.delegate = self;
_swipeTableView.dataSource = self;
_swipeTableView.shouldAdjustContentSize = YES;
_swipeTableView.swipeHeaderView = self.tableViewHeader;
_swipeTableView.swipeHeaderBar = self.segmentBar;

实现数据源代理：

- (NSInteger)numberOfItemsInSwipeTableView:(SwipeTableView *)swipeView {
    return 4;
}

- (UIScrollView *)swipeTableView:(SwipeTableView *)swipeView viewForItemAtIndex:(NSInteger)index reusingView:(UIScrollView *)view {
    UITableView * tableView = view;
    if (nil == tableView) {
        UITableView * tableView = [[UITableView alloc]initWithFrame:swipeView.bounds style:UITableViewStylePlain];
        tableView.backgroundColor = [UIColor whiteColor];
        ...
    }
    // 这里刷新每个item的数据
    [tableVeiw refreshWithData:dataArray];
    ...
    return tableView;
}

STCollectionView使用方法：

MyCollectionView.h

@interface MyCollectionView : STCollectionView

@property (nonatomic, assign) NSInteger numberOfItems;
@property (nonatomic, assign) BOOL isWaterFlow;

@end



MyCollectionView.m

- (instancetype)initWithFrame:(CGRect)frame {

    self = [super initWithFrame:frame];
    if (self) {
        STCollectionViewFlowLayout * layout = self.st_collectionViewLayout;
        layout.minimumInteritemSpacing = 5;
        layout.minimumLineSpacing = 5;
        layout.sectionInset = UIEdgeInsetsMake(5, 5, 5, 5);
        self.stDelegate = self;
        self.stDataSource = self;
        [self registerClass:UICollectionViewCell.class forCellWithReuseIdentifier:@"item"];
        [self registerClass:UICollectionReusableView.class forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"header"];
        [self registerClass:UICollectionReusableView.class forSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:@"footer"];
    }
    return self;
}


- (NSInteger)collectionView:(UICollectionView *)collectionView layout:(STCollectionViewFlowLayout *)layout numberOfColumnsInSection:(NSInteger)section {
    return _numberOfColumns;
}

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
    return CGSizeMake(0, 100);
}

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section {
    return CGSizeMake(kScreenWidth, 35);
}

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout referenceSizeForFooterInSection:(NSInteger)section {
    return CGSizeMake(kScreenWidth, 35);
}

- (UICollectionReusableView *)stCollectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath {
    UICollectionReusableView * reusableView = nil;
    if ([kind isEqualToString:UICollectionElementKindSectionHeader]) {
        reusableView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"header" forIndexPath:indexPath];
        // custom UI......
    }else if ([kind isEqualToString:UICollectionElementKindSectionFooter]) {
        reusableView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:@"footer" forIndexPath:indexPath];
        // custom UI......
    }
    return reusableView;
}

- (NSInteger)numberOfSectionsInStCollectionView:(UICollectionView *)collectionView {
    return _numberOfSections;
} 

- (NSInteger)stCollectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
    return _numberOfItems;
}

- (UICollectionViewCell *)stCollectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    UICollectionViewCell * cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"item" forIndexPath:indexPath];
    // do something .......
    return cell;
}

如果STCollectionViewFlowLayout已经不能满足UICollectionView的布局的话，用户自定义的flowlayout需要继承自STCollectionViewFlowLayout，并在重写相应方法的时候需要调用父类方法，并需要遵循一定规则，如下：

- (void)prepareLayout {
    [super prepareLayout];
    // do something in sub class......
}

- (NSArray *)layoutAttributesForElementsInRect:(CGRect)rect {
    NSArray * superAttrs = [super layoutAttributesForElementsInRect:rect];
    NSMutableArray * itemAttrs = [superAttrs mutableCopy];

    // filter subClassAttrs to rect
    NSArray * filteredSubClassAttrs = ........;

    [itemAttrs addObjectsFromArray:fittesSubClassAttrs];

    return itemAttrs;
}

- (CGSize)collectionViewContentSize {
    CGSize superSize = [super collectionViewContentSize];

    CGSize subClassSize = .......;
    subClassSize.height += superSize.height;

    // fit mincontentSize
    STCollectionView * collectionView = (STCollectionView *)self.collectionView;
    subClassSize.height = fmax(subClassSize.height, collectionView.minRequireContentSize.height);

    return subClassSize;
}