此方法较为繁琐，博主已经写了一篇新文章，这种方式用户体验更好一些。
链接：http://www.jianshu.com/p/a120dc88899e
核心代码：
// 点击评论回复按钮
-(void)reply:(UIButton *)button{
if (button.selected == NO) {// 点击回复时
NSDictionary *dic =@{};
NSDetailCommentCellModel *model = [[NSDetailCommentCellModel alloc]initWithDictionary:dic error:nil];
[_dataArray insertObject:model atIndex:button.tag+1];
[self replyInsertTableviewRow:button.tag +1];
[_longDetailView.tableview reloadData];
if (button.tag<_markIdex) {
_markIdex = _markIdex+1;
}
if (_markIdex > 0) {
[_dataArray removeObjectAtIndex:_markIdex];
[self replyDeleteTableviewRow:_markIdex];
[_longDetailView.tableview reloadData];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:_markIdex-1 inSection:0];
NSHotCommentCell *cell = [_longDetailView.tableview cellForRowAtIndexPath:indexPath];
if (cell == nil) {
HotCommentReplyCell *cell = [_longDetailView.tableview cellForRowAtIndexPath:indexPath];
[cell.replyBtn setSelected:NO];
[cell.replyBtn setTitle:@"回复" forState:UIControlStateNormal];
}else{
[cell.replyBtn setSelected:NO];
[cell.replyBtn setTitle:@"回复" forState:UIControlStateNormal];
}
}
_markIdex = button.tag+1;
[button setSelected:YES];
[button setTitle:@"取消" forState:UIControlStateNormal];
//更新布局
[_longDetailView.tableview mas_updateConstraints:^(MASConstraintMaker *make) {
make.height.equalTo(@(_longDetailView.tableview.contentSize.height+64));
}];
[_longDetailView.scrollView mas_updateConstraints:^(MASConstraintMaker *make) {
make.bottom.mas_equalTo(_longDetailView.tableview.mas_bottom);
make.bottom.mas_greaterThanOrEqualTo(_longDetailView);
}];
}else{// 点击取消时
[_dataArray removeObjectAtIndex:button.tag+1];
[self replyDeleteTableviewRow:button.tag+1];
[_longDetailView.tableview reloadData];
[button setSelected:NO];
[button setTitle:@"回复" forState:UIControlStateNormal];
_markIdex = -1;
//更新布局
[_longDetailView.tableview mas_updateConstraints:^(MASConstraintMaker *make) {
make.height.equalTo(@(_longDetailView.tableview.contentSize.height+64));
}];
[_longDetailView.scrollView mas_updateConstraints:^(MASConstraintMaker *make) {
make.bottom.mas_equalTo(_longDetailView.tableview.mas_bottom);
make.bottom.mas_greaterThanOrEqualTo(_longDetailView);
}];
}
}
// 回复插入一行
- (void)replyInsertTableviewRow:(NSInteger)index{
[_longDetailView.tableview beginUpdates];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:index inSection:0];
[_longDetailView.tableview insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationTop];
[_longDetailView.tableview endUpdates];
[_longDetailView.scrollView mas_updateConstraints:^(MASConstraintMaker *make) {
make.bottom.mas_equalTo(_longDetailView.tableview.mas_bottom);
make.bottom.mas_greaterThanOrEqualTo(_longDetailView);
}];
}
// 回复删除一行
- (void)replyDeleteTableviewRow:(NSInteger)index{
[_longDetailView.tableview beginUpdates];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:index inSection:0];
[_longDetailView.tableview deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationNone];
[_longDetailView.tableview endUpdates];
[_longDetailView.scrollView mas_updateConstraints:^(MASConstraintMaker *make) {
make.bottom.mas_equalTo(_longDetailView.tableview.mas_bottom);
make.bottom.mas_greaterThanOrEqualTo(_longDetailView);
}];
}
