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) {
      
  }];

}
}