How to show table view in categories and when clicked on one row it will expand with content? I've seen it in some apps and that's how I know it is possible but can't find any reference or tutorial regarding it.
I would appreciate if someone could help me even if I don't have example code, because I don't know how to start with it.
I think this should be done by means of table view. I personally did this the following way: at first there was a table view with 5 sections and every section had no rows in it, only a header. When the header is clicked the sections "expands" - I add the rows to the section (insertRowsAtIndexPaths). If the section header is clicked again, I delete the rows from datasourse (deleteRowsAtIndexPaths). Hope this is useful
Go through this sample code
https://github.com/adamhoracek/KOTree
The table view will look like this
来源：https://stackoverflow.com/questions/8657502/expandable-tableview