"A Closer Look at Table-View Cells" from Apple, explains how to use "The Technique for Static Row Content" to use Interface Builder to setup the cells in a tableview.
I have some cells with different heights in my tableview. Without using the heightForRowAtIndexPath method everything get messed up. Do I still need to use this method or can I setup the height of the cells inside the IB as I created them there?
Also when using the "The Technique for Static Row Content" from the guide you still need to use the cellForRowAtIndexPath to setup the cells even if they are created in IB. I would like to setup the full layout of the tableview with all cells in IB (drag the cells right into the tableview), is that possible in some way?
While it would be nice if Interface Builder could do all that, it doesn't. To make things look correct, you have to implement the heightForRowAtIndexPath: and cellForRowAtIndexPath:. To make things easier for yourself, you could make an array and just look these things up (assuming you don't have too many rows in the table).
Yes, you have to implement heightForRowAtIndexPath.
However, in case you have static rows only, you don't have to implement cellForRowAtIndexPath, because static cells are generated by IB.
To get cell and its content (which is probably required to calculate height, eg, labels on different languages can have different length, resulting in a different cell size, etc), you can use ancestor method, like that:
UITableViewCell *cell = [super tableView:tableView cellForRowAtIndexPath:indexPath];
Related
When attempting to create a form with UITextFields, it appears that cellForRowAtIndexPath: gets called every time a user scrolls up and down the tableView. When this happens, a new UITextField is created, and the old UITextFields are no longer visible. Is there a way for the cellForRowAtIndexPath: method to be called for just one iteration?
Check the docs for UITableViewCell, especially A Closer Look at Table-View Cells and the section about static cell content.
Perhaps you might consider a simple UIScrollView rather than a UITableView? It's difficult to tell what you're trying to accomplish here. Perhaps add a bit more detail to your question.
Create UITableViewCell nibs in Interface Builder with UITextFields and link all of the objects with the viewController class.
I was working with the grouped table view , and i wanted different controls for every row i.e switch control for 1st,radio button for 2nd ,checkbox for 3rd and so on.. how can this be implemented programmatically that is without using interface builder
thanks in advance
CharlieMezak said is right, you need to create in UIControls directly in cellForRowAtIndexPath , and add as subviews to contentView of the cell
For reference see the link below
http://www.e-string.com/content/custom-uitableviewcells-interface-builder
the link specifies the code to create cells programmatically as well as using IB.
Table View Programming Guide for iOS
Read the programing guide, and remember to use different CellIdentifier for each type of cell.
This is a pretty vague question.
Obviously you need to provide the cells to the tableview in its cellForRowAtIndexPath delegate/datasource method. So, either in that method or during the initialization of your view controller, build the UITableViewCell instances that you need, adding the various controls that you want to them as subviews and connecting the controls to your view controller so you can detect when they have been changed. Then just return the appropriate cell in the cellForRowAtIndexPath method.
Personally, I think it's a lot easier to use IB in cases like this. Just create an IBOutlet instance variable for each custom cell you want, and return the right cell in cellForRowAtIndexPath.
I have a list reusable UItableViewCells. As what I want: after selecting one of the cells, the app should update the images on each Cell.
For solving this requirement, I use method visibleCells to fetch all the cells from UITableView, and update the images in each cell by iterating the returned cell array.
But the problem is: I can not get all the cells, method visibelCells only returns the cells currently appear on the iPhone screen.
So, any idea about how to get all the reusable cells into one array?
I think that you might be misunderstanding how the UITableView is implemented. The important point to understand is that cells that are not visible i.e don't actually exist (or at least they might not)
Accordingly, you should update the images on the visible cells and update the images on other cells as they become visible in your implementation of
-(UITableViewCell) cellForRowAtIndexPath (NSIndexPath *)indexPath
At the moment, I have a settings view in my iPhone app built with Interface builder, it consists of a background image, some text fields, labels and buttons. Because this looks bad, I want to convert the settings view to an UITableView with custom UITableViewCells.
I already tried adding some cells into my settings view's XIB and returning them in the cellForRowAtIndexPath method (with [return myCell];), as written in Apple's tutorial, but this was not working for me - my whole TableView looked strange and it only showed the first cell correctly.
Is it possible to design these custom cells in Interface Builder? Do I have to create an empty XIB for them or can I put them in my view's XIB? And how do I insert them into my TableView?
Thanks in advance,
Yassin
You can absolutely add custom table cells that you built in interface builder. This includes both static cells and Dynamic cells. However without you providing more information the best I can say is "double check the docs and try again." I can only say that it works and it's rather straightforward so it's hard to say what you may have missed. It might be more helpful if you post what you have for the tableView:cellForRowAtIndexPath method.
Since you say you just have some text fields, I would recommend looking at the technique for static row content section of the Table View Programming guide. You probably would want to have each field of your form correspond to a row in a Segmented Table View, it'll make everything look nicer.
Is there any sample code that would illustrate how to have multiple images within each row?
Typical apps show a thumbnail to the left side with text to the right. I'd like to do that plus an image to the right of the text.
How would I go about doing this?
In interface builder, simply create a tableview cell that looks like you want. Then create a UITableViewCell subclass that has properties pointing to the elements of the new cell. Set the class of cell to the subclass then add cells of that class to the table in the standard way.
A tableview cell is just a view and you modify it and use it just like any other view.
You'll have to create a custom UITableView cell. Here's an example of using multiple UILabels in one. Here's another.
Pretty easy - follow Apple's documentation to create exactly the cell you want in Interface Builder with as many UIImage or whatever else you like. Look at Table View Programming Guide for details on how to make and load the custom cells - just be careful about performance when you put a lot of visual elements in a table view.