I have a custom table view with a custom table view cell.
I have a uiview with three buttons. How can I set that when a row is selected the uiview will popup over the cell? Basically I want a popover controller. Should the uiview be inside by table view controller?
I'm targeting iphone and cannot use people's project.
It depends on whether your popover view fits entirely within the cell.
If so, when you build the cell, add the popover view and mark it hidden. Then, when the delegate is told that the cell has been selected, change hidden to NO (you could even play with the alpha and wrap that inside [UIView animateWithDuration:animations:] to have it fade in).
If not, then you'll want to have the popover view ready ahead of time, and add it to the window directly when the cell is selected. You'll want to use the frame of the cell and the [cell convertRect:to:] method to position your view appropriately. You will also want to make sure that you add a "background" UIView to ensure that stray touches can't reach the UITableView underneath.
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Programmatically send to front/back elements created from interface builder
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I am using a .xib for my cell in a table view. Inside the .xib, is another view (cellBackgroundView), and a button. When I run the app, and click the button, it does not respond at all. Instead, it calls the tableView's didSelectedRowAtIndexPath method which brings another view controller.
Using Xcode's Debug View Hierarchy, I discovered that I have a view overlaying the all the buttons (see pic attached: this overlaying view is highlighted). This view (called backgroundView) that is overlaying my button is a View, within a view. I have a feeling when you place a view in a view, and put a button in the initial view, the button isn't called because its below the view hierarchy.
How do I fix this issue? Is there a way to move background view to the back of the view heirarchy so that the buttons will be responsive?
Debug View hierarchy:
Structure of .xib
Two things that you could check
1) Do you have a delegate method for cell height and is the height returned correct? Unless you have Clip Subviews on for the UITableViewCell, the contents of the cell can be visible outside it's frame, but the parts that are outside the cell's frame are not registering user interactions.
2) Is some other view element higher in the hierarchy (lower in the XCode listing you posted) overlapping the button? iOS Simulators Debug -> Color Blended Layers can help spotting this.
Edit:
If I interpret the added screenshots correctly, you probably have the issue mentioned in the option 1) above. If the other elements showing in the screenshot are those listed as subviews of the Cell Background View they are mostly outside the parent view's frame and thus don't receive touch events. If the background view's frame is correct, then you might want to move the other elements as children for Feed Cell directly.
Also, the element listing suggests that you are using plain UIView as the parent element. I don't know the inner workings of your application, but if you only use this view in a UITableViewCell you might want to consider making the parent view a Table View Cell in the xib. This will reduce some bloat and allow you to configure some properties for the cell in the xib.
Maybe you forgot assign your Button to code
I assume Feed Cell is a subclass of UITableViewCell, and cellBackgroundView is the property contentView of this cell.
If so, the cells property backgroundView should be behind your cellBackgroundView (the docs say: UITableViewCell adds the background view as a subview behind all other views and uses its current frame location.).
You could set the cells property backgroundView = nil, and see whether it is still there in the view hierarchy. If so, you do add a custom backgroundView on top of the other cells views somewhere.
To check this, you could read out the subview hierarchy of your cell in your method tableView:cellForRowAtIndexPath: with something like NSArray *svs = cell.subviews; (assuming cell is the tableViewCell) and set a breakpoint behind this statement.
svs usually contains first the UITableViewCellContentView, and above it the _UITableViewCellSeparatorView. The cells backGroundView will not be shown. You could check there your view hierarchy.
If by chance there is a custom backgroundView on top, you could - as a workaround, not a solution - bring the contentView to the front by sending to the cell bringSubviewToFront: with the contentView as argument. Then the button should respond.
In your Structure of Xib Place your button below the view that is first the view is added to superView then the Button, then your button will work.
or you can code
-(void)viewDidLayoutSubviews{
[self.view insertSubview:yourButton aboveSubview:cellBackgroundView];
}
Hope it will help.
Do you add an UIButton by code?
If so you should ensure you addSubview: into cell.contentView and not into cell.
Also you could try to apply CellBackground class to a view inside contentView, not directly to contentView.
you can use this method.
[cell.contentView bringSubviewToFront:yourButton];
after that if you want to back in background then tou can use sendSubviewToBack: method .
After adding this methods your button is not responding set the userIntractionEable of button's superview.
I have a tableView with cell and in a specific cell i want to add a view that is bigger that the cell and is is overlapping the other cell where i want to add buttons, labels and so on.
The problem is on scrolling and on touch. I tried bringSubviewToFront: and also set the zPosition to 3 and also i setClipsToBounds: to NO but as you can see in the hierarchy my custom views are under the cells.
My question is how to bring my custom view that are child of a custom cell in front of all cells and how to make all area to respond to touch events.
this is what i want to achieve, This happens only at the first start and gesture recognisers respond only over the parent cell.
You have to disable bounds clipping on your cell's view:
[cell setClipsToBounds:NO];
If the view that must overlap multiple cells is embedded in a subview, make sure that this subview has its clipsToBounds property set to NO too.
I have a UITableViewController inside a UINavigationController. I'm adding a "modal" subview to the tableView, which is a custom UIView when one of the rows is selected.
(It’s modal in spirit, not in the UIKit sense, since Apple doesn’t support modal views on iPhone, I’m adding it with a [self.view addSubview:customView] in my table view’s controller.)
I would like it to appear at the bottom of the screen and stay put there. I can get it to draw at the bottom, but once I scroll the table view, the view moves with it. Here are some illustrations:
Initial position (good):
Position after scrolling (bad):
I'm getting the bottom position by subtracting the height of all the chrome (navigation bar and status bar) as well as the height of the custom view from [UIScreen mainScreen].bounds.
How can I get the custom view to stay put? Should I constantly be adjusting its frame when the table view is being scrolled?
Your best and most flexible option is to switch to using a view controller with the table view as a subview so that you can change its frame and add sibling views. Then, when you want to add a modal you can run an animation to move the table view out of the way and slide the modal view in.
UITableViewController.view is an instance of UITableView. Means you added your custom view into a scroll view and that is why it scrolls. You can try to put your custom view into the tableFooterView property of the UITableView, which is the old school solution.
Personally I would create a container UIViewController and have UITableViewController be a sub viewController of it. Another sub viewController UIViewController or just a simple UIView could represent the footer.
According to the answer at UITableView, make footer stay at bottom of screen?, which I verify:
In order to have a footer that stays put at the bottom of the screen,
and doesn't scroll with the table, then you can't use a table view
footer. You can't even use a UITableViewController, you'll need to
implement your view controller as a UIViewController. Then you add
your own table view as a subview. You'll also need to add your footer
as a subview of the view controller's view, not the table view. Make
sure you size the table view so its bottom is at the top of the footer
view.
but the problem is that my UITextField, inside my footer, is being hidden by the keyboard when user tries to type. So how do I keep the keyboard from hiding the UITextField? Throughout the app, I have been using TPKeyboardAvoiding. But in this case, where a UIScrollView/TPKeyboardAvoidingScrollView contains a UITableView and a UIView in vertical order, it does not work. I generally like TPKeyboardAvoiding because it’s so quick and easy. Any ideas how I might fix this issue?
The instruction that you quote is telling you to use a UIViewController, add a UITableView as a subview, then add a UITextField as a subview of the UIViewController NOT as a subview of the UITableView.
Let me draw it out for you:
Step 1:
Add a UITableView to your view controller
Step 2:
Add your UITextField subview (you can embed the UITextField in a UIView container if you like) as a subview of your UIViewController's view NOT your UITableView footer.
Step 3:
If depending on if your using frames or autolayout, you adjust the frame or autolayout constraint constant values for your UITextField subview when user tap on the text field.
Step 4:
Finally, the keyboard appears and the UITextField doesn't get obscured by the keyboard.
Just make sure your UITableView doesn't initialize it's own automatic scrolling for keyboard appearing. If you use UITableViewController then just subclass it and make sure you don't call it's viewWillAppear:. I didn't investigate which exactly method you should block without using UITableViewController, so, you should find out this yourself or somebody else would help.
I did similar in my own project where I wanted to have own scrolling of table view for keyboard appearing.
Is it possible to make a grouped UITableView transparent above and below it's content. I am not looking for a parallax-type solution, but I have a UITableView that I add to my view controller. When pulling down on the table view, I would like to display the view controller view (that the table view us a subview of).
Right now, when I add a UITableView with the same frame as my view controller's view and add it as a subview, when I drag down on the UITableView the header above the first cell is the same colour as my UITableView's background. Instead I would like for it to reveal the content behind it more and more as the user drags down.
Is this possible and how? Thanks.