Auto Layout Cell Height

参考文章 iOS开发 - 处理不等高TableViewCell的小花招，实践出真知，也是费了一番力气才把文章 Cell 使用 Auto Layout自动算高。眼高手低总是有的，所以以后不仅要学习开发的思路方法论，重要是在实践一遍。

Auto Layout设置好高度约束。不要实现- (CGFloat)tableView:(UITableView *)tableView estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath

(void)viewDidLoad {
  [super viewDidLoad];

self.tableView.estimatedRowHeight = 100;  //  随便设个不那么离谱的值
  self.tableView.rowHeight = UITableViewAutomaticDimension;
}

- (TableViewCell *)tableView:(UITableView *)tableView
       cellForRowAtIndexPath:(NSIndexPath *)indexPath {
  TableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"
                                                        forIndexPath:indexPath];
  cell.avatar.image = [UIImage imageNamed:@"avatar"];
  cell.name.text = [NSString stringWithFormat:@"%ld", indexPath.row % 2];
  cell.time.text = [NSString stringWithFormat:@"%@", [NSDate date]];
  cell.source.text = @"Weibo.com";

  NSMutableString *str = [NSMutableString new];
  for (long i = 1; i < indexPath.row; i++) {
    [str appendString:@"The 1989 World Tour (Live)"];
  }
  [str appendString:@"END!!!"];
  cell.text.text = str;

  //移除多余边框，如果是图片是 Aspect Fill 或者 Aspect Fit
  cell.pic.layer.borderColor = [UIColor clearColor].CGColor;
  cell.pic.layer.borderWidth = 0.1;
  cell.pic.layer.masksToBounds = YES;
  
  if (indexPath.row % 2 == 1) {
    cell.pic.image = [UIImage imageNamed:@"pic"];
  } else {
    cell.pic.image = nil;
  }
  
  return cell;
}

源码：https://github.com/gewill/test-projects/tree/master/test%20auto%20height%20cell