关于自动计算高度导致cell画面抖动的解决方法

主要实现是通过缓存高度来解决

/**
 * 缓存高度
 */
@property (nonatomic,strong) NSMutableDictionary *cellHeightsDictionary;

//初始化

self.tableView.estimatedRowHeight=50;

self.cellHeightsDictionary=[[NSMutableDictionary alloc]init];

// 保存高度

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {

    [self.cellHeightsDictionary setObject:@(cell.frame.size.height) forKey:indexPath];

}

// 获取高度

- (CGFloat)tableView:(UITableView *)tableView estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath {

    NSNumber *height = [self.cellHeightsDictionary objectForKey:indexPath];

    if (height) return height.doubleValue;

    return UITableViewAutomaticDimension;

}