I am looking for code in swift to loop through the table custom cell row (have 2 text boxes in row). These rows are dynamically created and on click of button, i want to read those text box values. I don't find good example for this in online, any help is appreciated.
Your thinking is wrong. You should not store any data in table view cells. The user can scroll them off the screen at any time and any changes to the data is lost.
You should really store the input from your table view cells into your model as soon as the user makes a change.
Related
I am using a table view to show my data. There is no separator view in between the cells but when I switch on the voice over, the focus after on the cell, goes in the space between the two cells ans then on another swipe goes to the next cell.
I am not able to figure out what's going wrong.
The tableView is being imported from another framework, where it is working fine.
The separatorStyle for tableView is set to none.
I just figured out the problem.
In the framework where tableView is populated, array.filter{ !$0.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty } was missing at one place where the tableView was passed with the array as data.
so, that focus was on cells with empty spaces as data.
Thank you
I'd like to get every data that is within all cells in one tableview which is quite a long list.
I'm looking for an approach on how to retrieve everything including those hidden in view, which I know the views are reused. I think some of you might have experienced this problem before, what are your approach on this?
I've tried
let cells = self.tableView.visibleCells
then looping into every cell and saving each data to an array but it is not effective in getting those that aren't part of the view or hidden. Is there a way to get over this?
In cellForRowAtIndexPath, YOU are telling the table what is in each cell. So why would you turn around and ask the table what's in each cell? If the user puts "Hello" in your first cell, then scrolls the table enough to push that first cell out of view, then when the user scrolls back to the top, YOU are the one telling it to put "Hello" back in that first cell. YOU own the data source, not the table.
You need a data source. That can be "empty" at first, maybe an array of empty strings if that's what you want (each index in the array could map to a table row for example). But then, as the user interacts with the text fields in the cells, you need to update that data source with the text they entered.
You should use that data source as your source for the cellForRowAtIndex method. That way you can handle populating the cells when they are requested by the table, and you also know all the data when the user is done.
Why not just update the model each time the user taps a key when editing a textfield? You could create a protocol for that cell subclass and make your view controller the delegate for each cell. As long as cells are guaranteed to stay on the screen while you're typing (you'll get some weird behaviors if not) the cell can send a message to the view controller or whatever you hook it up to telling it what new value to store. Then everything is already stored for you when you need the full list, and you don't have to interact with the tableview.
I am getting really frustrated trying to solve this problem i tried implementing it in many many ways but no solution. I have a UIStepper in a custom cell and i want to change a value on the cell. Everything works fine expect when i scroll around the tableView the values from the UIStepper changes from one cell to another. Please help here are my screen shoots.
Link to tableview implementation and link to cell implementation
You are trying to store the stepper value inside each individual cell. That's not going to work because cells are reused; the cell that you now see in row 2 may reappear in row 20 when the user scrolls.
That is why you must store the value for the stepper in the model (your data) on a row-by-row basis, so that you can set it freshly and correctly for that row every single time cellForRowAtIndexPath: is called.
This, in turn, means that as the user steps the stepper, its valueChanged is going to need to talk to the table view data source so that the model can be updated ("the stepper value for row 5 has just been changed to 3") and maintained in the model.
I'm trying to create a UITableview that contains STATES and CITIES. To start with, I'd like the table to display only the STATES, with each value having a downward facing disclosure arrow on the right hand side of the cell which lets the user know it has values underneath it. If the user clicks the arrow, the table would expand to show the CITIES associated with the selected STATE. The user could then either select a CITY, or click on a upward facing disclosure arrow which would then "hide" the CITIES.
I've downloaded and reviewed Apples "Table View Animations and Gestures" example.
I was hoping someone might know a simpler way of accomplishing what I'm asking for.
http://developer.apple.com/library/ios/#samplecode/TableViewUpdates/Introduction/Intro.html
Good Job on explaining exactly what you want to do. This is how I would tackle this, I figure it would be easier to explain it without giving you meaningless code and answer any coding concerns you might have after.
I would set up the table view data source to be an array of arrays. The idea would be that every index in the array would represent a state and therefore contain a number of cities, hence ever index contains an array (array of cities). The parent array(of states) will be empty at the beginning, but the arrays(of cities) that will later fill it would be populated with the appropriate cities.
I would then set up the table view to contain sections (I a tempted to put code here, but read along). The sections would represent the cities. You can then fill out the table view with sections using (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section delegate. On the first run you can fill the actual table with one cell per section (maybe with the word "expand" or "more" and your down arrow). When the user touches that cell you can use the didselectrowatindexpath to know which section was touched (the indexpath object contains the section), now that you know which section it is, just modify the data source by adding the array of cities for that section of the array of arrays (parent array) and update the tableview.
This essentially gives your tableview an according style and feel. It is very easy to implement but requires a little bit of code. I have done this and am willing to provide the code you might need, the trickiest part would be to update the tableview in the correct way.
EDIT CODE:
I did a simple example following above explanation. The code is on Github , feel free to ask any questions about it.
I think a better way to represent this information would be to have a UITableView containing the states with each state showing a tiny arrow pointing to the right. Then, when a user clicks on the state, load the next UITableView that shows all of the cities in that particular state. Using a UIViewController for pushing the City list will allow users to easily return to the States list.
This approach will make much more sense to iOS Users, because this is how they expect Tables to work.
There are many tutorials explaining how to use UITableView. Here is a link to a site with many UITableView tutorials. The tutorial I linked to explains pushing a UIViewController on to the stack so that there is a simple back button back to the State list.
Normally such thing is done by seguing to another view and showing more details about cell.
What you want you could achieve by actually making custom UITableViewCell which would contain UIButton with arrow image and UITableView. In case button is clicked for the first time you could reload your cell and create inner UITableView which could show cities. Another click would simply reload cell again and not return inner UITableView at all. You also need to keep selected state somewhere because you may have to reload previous cell and hide inner table in case arrow in other cell is clicked.
I have a set of data in a matrix which I would like to display in my iPhone app with all of the rows and columns intact. Everything I can find on the web dealing with "tables iPhone" gives me information on UITableView, which only lets you show a list of items to the user - not an actual table in the HTML sense. What's the best way on the iPhone to display an actual table of data to the user, with column & row headings and table cells?
The solution that I found was simply to use a UIWebView. Then I can build the HTML table dynamically and load it into the web view.
The UITableView class was specifically designed to only show one column at a time due to the small size of the screen. If the data of your application absolutely needs to be laid out in one big grid on one screen the right way to do it, would be to add each cell as a subview to a custom view. Then implement the layoutSubviews method on your custom view to lay out the frames of the subviews in the grid you want.