效果圖 :

cell的刪除與插入.gif

數據來源 :

plist1.png

plist2.png

主要代碼 解析:

1.點擊每組的代理 -- 控制器中實現

pragma mark - ExpandHeaderFooterViewDelegate

 - (void)didSelectedHeaderFooterView: (ExpandHeaderFooterView *)headerFooterView {   
     // 1.關閉展開的組
    if (self.isOpen && self.lastSelectedSection != headerFooterView.tag) {
    
    self.isOpen = NO;
    
    // 先收起之前組的箭頭
    ExpandHeaderFooterView *view = (ExpandHeaderFooterView *)[self.tableView headerViewForSection:self.lastSelectedSection];
    [view changeArrowWithIsOpen:NO];
    
    // 刪除所展開的cell
    NSIndexPath *deleteIndexPath = [NSIndexPath indexPathForRow:0 inSection:self.lastSelectedSection];
    [self.tableView deleteRowsAtIndexPaths:@[deleteIndexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}

// 2.點擊同一組處理
if (self.isOpen && self.lastSelectedSection == headerFooterView.tag) {
    self.isOpen = NO;
    // 刪除所展開的cell
    NSIndexPath *deleteIndexPath = [NSIndexPath indexPathForRow:0 inSection:self.lastSelectedSection];
    [self.tableView deleteRowsAtIndexPaths:@[deleteIndexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
    return ;
}

// 3.展開所點擊的組(非同一組)
      self.isOpen = YES;
      self.lastSelectedSection = headerFooterView.tag;

      NSIndexPath *insertIndexPath = [NSIndexPath indexPathForRow:0 inSection:headerFooterView.tag];
     [self.tableView insertRowsAtIndexPaths:@[insertIndexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
 }

2.模型中的代碼 :

---.h文件

@property (nonatomic, copy) NSString *title;
@property (nonatomic, strong) NSArray *texts;

/// 自定義屬性
/// 存放每個組中文本的計算高度, 用于在cell中創建label時設置高度
@property (nonatomic, strong, readonly) NSArray *everyTextHeightArray;
/// 每個cell的最終高度
@property (nonatomic, assign) CGFloat cellHeight;
@end    

---.m文件
- (NSArray *)everyTextHeightArray {

    NSMutableArray *tmpMarray = [NSMutableArray array];

    _cellHeight = 0;

    for (int i = 0; i<_texts.count; i++) {
    
        NSString *text = _texts[i];
    
        CGFloat textHeight = [text boundingRectWithSize:CGSizeMake(APP_SCREEN_WIDTH - 40, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName : [UIFont systemFontOfSize:14]} context:nil].size.height + 15; // 加15: 每個label之間的距離
    
        _cellHeight += textHeight;
    
        [tmpMarray addObject:@(textHeight)];
    }   
    return tmpMarray;
}

完整代碼地址:

https://github.com/StephentTom/TableViewSectionExpand.git