如何在不选择任何行的情况下从iPhone的表格视图单元中读取值

Question

thanks in advance i want to read cell value from tableview but without selecting any cell. let me explain first in my table view each cell have some value when tableview is drown fist time this all value is coming from database. then later through didselectedRowAtIndexPath for example i select first cell value and take it in label in another view and change it a when i click save button on new view then my new value is coming back in first view in table view cell correctly this all operation is correctly working.

but my problem is that after changing some cell value i want to read all the data that display on table view cell but without selecting any cell in didselectedRowAtIndexPath or any other method i read this cell value on my save button on this view and after read this value i again save it in database

Answer 1

Geez, I think if I were you I'd go the other direction. You surely have a data structure of some sort (an NSArray, quite likely) that you used to populate your tables with data in the first place, right? Why not just get it from there, rather than getting your mitts on the UITableViewCell and digging into its view hierarchy to find the label you want?

Answer 2

The didselectedRowAtIndexPath method is just a means to tell you what point in your array to read data from. You have to create an array of some sort to build the table from. If you know you want to read data from the first cell, simply read it directly from the array populating your table. Doing this at the end of viewDidLoad would be appropriate.

Answer 3

Try...

UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];

if its a custom cell use

CustomCell *cell = (CustomCell *)[tableView cellForRowAtIndexPath:indexPath];

NSLog("%@", cell.property):

Answer 4

You can get cell for only visible rows without clicking them as

NSArray *visibleRowsArr = [tableView indexPathsForVisibleRows];

UITableViewCell *cell = [tableView cellForRowAtIndexPath:[visibleRowsArr objectAtIndex:0]];

and from this cell you can get values for a tag which you have to specify while creating a cell.