仿 QQ 消息 显示动画

• (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{
  RTHomeTableViewCell *displayCell = (RTHomeTableViewCell *)cell;

  if (!displayCell.model.isAnimated) {
  //效果1
  // cell.transform = CGAffineTransformMakeScale(0.5, 0.5);//CGAffineTransformScale(cell.transform, 0.5, 0.5);
  //效果2
  // cell.transform = CGAffineTransformMakeTranslation(0, cell.height);
  //效果3
  cell.transform = CGAffineTransformMakeTranslation(-JKScreenW * 0.5, 0);

    cell.alpha = 0;
    [UIView animateWithDuration:0.5 animations:^{
        cell.transform = CGAffineTransformIdentity;
        cell.layer.transform = CATransform3DIdentity;
        cell.alpha = 1.0;
        displayCell.model.isAnimated = YES;
        
    } completion:^(BOOL finished) {
        
    }];
  

  }
  }