- (NSArray *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath
{
 // 添加一个'删除'按钮
 UITableViewRowAction *deleteRowAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDestructive title:@"删除" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath) {
  NSLog(@"点击了'删除'");
  // 1. 更新数据
  // 2. 更新UI
//  [tableView deleteRowsAtIndexPaths:@[indexPath]withRowAnimation:UITableViewRowAnimationAutomatic];
}];
 // 添加一个'置顶'按钮
 UITableViewRowAction *topRowAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"置顶" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath) {
  NSLog(@"点击了'置顶'");
  // 1. 更新数据
  // 2. 更新UI
  //NSIndexPath *firstIndexPath = [NSIndexPath indexPathForRow:0 inSection:indexPath.section];
  //[tableView moveRowAtIndexPath:indexPathtoIndexPath:firstIndexPath];
  }];
 topRowAction.backgroundColor = [UIColor blueColor];
 // 添加一个'更多'按钮
 UITableViewRowAction *moreRowAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleNormal title:@"更多" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath) {
  NSLog(@"点击了'更多'");
  [tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationMiddle];
 }];
 moreRowAction.backgroundEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleDark];
 //将设置好的按钮放到数组中返回
 return @[deleteRowAction, topRowAction, moreRowAction];
}