使用tableViews自定义单元格时如何在运行时更改表视图单元格的高度？

Question

I have main tableView M which has X number of cells, each x has sub tableView S with N number of cells. I use estimatedRowHeight and UITableViewAutomaticDimension to create dynamic cells height . The question is, how to force the M table view to relayout and change the height of x cells to fit the content size of the S tableView at runtime?

here is an image of what i want to implement

Answer 1

I think you need to manually calculate the height of each cell(each X cell) in table view M. First find the height of your tableView S's height in each X cell.

Calculating TableView S's height:

Height = Number of cells * Height of each cell(N)

X cell's height = Height

NOTE: Here you'd mentioned that you are using UITableViewAutomaticDimension for tableView S also. So you ned to find the height of the each cell N, based on your content in it. E,g: If you are gonna to load string in cell N, just calculate label height based on string length and then provide your Cell N height by adding proper spacing height with label height.

Thanks.

Answer 2

You have to calculate it manually height of each cell in table view M. before that find out the height of your tableView S's height with N cells.

1. get S's tableview.contentSize.height
2. give this contentSize to the M's cell X.
3. now get M's tableview.contentSize.height

make two individual methods for getting tableview's height by their cells and write them in "cellAtRow" delegate of tableview. (make iboutlet of height constraint of auto layout). just reload table when it need to change at run time.