I started a vanilla master detail project with swift. If I add a new view controller and set the custom class, then the modules list is empty and it is not possible to choose a module. The error message "Unknown class in Interface Builder file." appears in the console if I run the code.
How can I setup the storyboard to know the custom class and module?
How it should be. The two classes from the template are just fine.
and how it is
I have to add customModule="Target_Name" customModuleProvider="target" to the interface builder source code. That is really annoying!
Update:
If I move the whole project directory to another, e.g. to the desktop it works. Looks like my directory with the name "Repository" is broken. Don't know why :(
I used to encounter the same issue, I finally found that the StoryBoard's Target Membership has been set incorrectly
.
I was getting the same problem but I discovered that I had inadvertently assigned a non-existing custom class to the view object managed by my view controller. So in the storyboard document view, I selected the badly configured view object, then in the identity inspector, deleted the bad custom class displayed for it (by backspacing and hitting return). That took care of the problem.
In my case, the custom class should be assigned to to the view controller, and not the view object managed by the controller.
I hit a similar issue when I changed the default Xcode project's UIViewController subclass to instead be a subclass of UITableViewController. (I made this change in the class source file, nothing to do with Storyboard).
I then went and typed my new class name into the IB "Class" field of the default "view" in the Storyboard. It would not autocomplete my class name, and then gave the Unknown class in Interface Builder file error when run.
The solution was to delete the default UIViewController object from the Storyboard, then add a new UITableViewController. Then, set that object's Class in IB to be your custom class.
It seems like the original question may be hitting this issue, as the first screenshot's class is ...ViewController and the second is ...TableViewController.
I've encountered the same issue and got it fixed. Reading this question gave me an idea to check the Identity Inspector further more and I found that the class Module should be inherit from target instead from a None module as I had.
Try checking the Inherit Module From Target checkbox and rebuild.
Hope it can help someone, obviously your problem has been solved since it was published in 2014.
Related
I have a custom class TULabel which derives from regular UILabel in my custom framework (which is another target inside the same project with my app). I have used my custom class in Interface Builder for months with no issues: I've selected a label, went to Custom Class, started typing my custom class name and it even completed itself.
I've been working on this project for long time and today I've realized I can't type TULabel into the custom class box anymore. I can type almost anything, even classes that don't exist. But when I try to type TULabel (or any other custom class from my framework) it just reverts to the previous value:
The only way for me to use my custom classes is to open up the Nib/Storyboard as source code, and type my custom class there which is, obviously, not acceptable. Weird enough, when I run my app it builds and runs correctly, with the custom label there (and I'm sure that it's the actual custom class instance and not runtime ignoring my custom class and reverting to label as it has custom drawing behavior which is displayed)
I have no idea when and where it broke since I've been working on the project for so long time and haven't tried to add a custom class for weeks.
I've tried opening and closing Xcode, cleaning my project and derived data folder, rebuilding the project but no avail. It's still the same.
Why is Interface Builder explicitly disallowing my class and how can I make Interface Builder accept my custom class name again?
I am on Xcode 9.2.
I know this question has been asked a few times before, and I have checked all the solutions offered.
- My storyboard viewcontroller is linked to a custom class. This seems to work since you can click the little arrow, and it opens up the correct class file.
- The custom class is included in the project.
- The storyboard source file shows the correct name for the class.
I still get the error "Unknown class KnorkMans in Interface Builder file"
This screenshot shows all the steps I have taken:
You also have to manually select module VerwijderMij.
I watched the "What's New in Interface Builder" session video and tried to replicate the code that was showed but unfortunately when I assign a view to my custom class which has #IBDesignable I get 2 errors:
Main.storyboard: error: Live Views: Failed to update auto layout status: The bundle “swiftTest” couldn’t be loaded because its executable isn’t loadable.
Main.storyboard: error: Live Views: Failed to render instance of _TtC9swiftTest14ControllerView: The bundle “swiftTest” couldn’t be loaded because its executable isn’t loadable.
Later on in the video I saw that to have Live Views you have to make these steps:
1. Create framework
2. Create class
3. Mark as designable
How do I make the 1st step?
Thanks
As I understand it at the moment (prior to Xcode 6 Beta 3), #IBDesignable will only work from a view declared in a separate framework target.
However, I also struggled to add it because I had no "plus" button as described in various links (because the Hide Project & Target Lists arrow option was toggled off).
So, select your current project target, then just use the xcode menu options:
Editor > Add target...
Then select
Framework & Library > Cocoa Touch Framework etc.
By the way, to test #IBDesignable, this tutorial worked perfectly as a starting point:
http://www.weheartswift.com/make-awesome-ui-components-ios-8-using-swift-xcode-6/
One small but important thing to note in that tutorial (if you follow it onscreen instead of following on to its full github code listing) is that your view class must be prepended/decorated with #IBDesignable, e.g.
class CustomView : UIView {...}
should be
#IBDesignable class CustomView : UIView {...}
You should make new framework as a target for current project and add your live views in this framework. On General tab on main target you will see your framework in Embedded Binaries section.
I had a project with live views working and at one point I also had these error messages. This went away for me when closing XCode and restarting, fwiw.
It is working very well (and easily) for me with Swift in Xcode 6 Beta 5.
I've confirmed that with Xcode 6 Beta 5 I did not need to add any frameworks (for example, Cocoa Touch framework option under frameworks in the dialog that appears when adding a new project target). Nor did I need to add IBDesignable.h to the project. Both seem to be outdated requirements as per the the weheartswift.com write-up linked in the initial answer to the question.
All I needed to do was:
Prefix class definition of my custom Swift class source file
with keyword #IBDesignable
Prefix vars I wanted to show up in IB Attributes Inspector with #IBInspectable (IB recognizes several common variable types).
Then, after assigning my custom component's (UIControl subclass) name to IB's "Class" name file (under Identity Inspector tab, in right pane) replacing "UIView" -- e.g. the class name of the UIView placeholder object I originally dragged onto the IB VC's view -- upon selecting my custom component from the Content View component list in IB, I saw all my custom class' inspectable items show up in the IB Attributes Inspector!! Very cool.
Note: At first XCode would only allow me to prefix one variable with #IBInspectable. It showed errors on subsequent ones. Then, suddenly it seemed to work, and no more problems after that. Not sure if it was a typo or just took Xcode awhile to re-index my project and pre-compile or parse the code.
I code about #IBDesignable & #IBInspectable,
firstly, I got two errors like you,
then, I change the code I wrote,
you can checkout the code from my github
Good Luck.
I realized that when launching assistance editor while working on a XIB file no longer opens the header file by default, instead it shows the implementation file. Is there a new workflow going on I am not aware of? While in the implementation file I can only seem to be able to add IBActions. What is the "new" way to create IBOutlets? Switching to header file each time??
My 2 Cents:
When you create a new class using the Xcode templates, it usually provides a class extension in the implementation file for private properties. It makes a lot of sense to actually link the IBOutlets and IBActions there, because in most cases they are only ever used within the class itself.
The only exception to this that crosses my mind right now is UIView subclasses, and especially UITableViewCell. A lot of developers access the IBOutlets directly in cellForRowAtIndexPath:.
Apple engineers' message:
Encapsulate your IBOutlets & IBActions whenever possible!
I am trying to build a custom TableViewCell, and so far I have created a xib file and laid it out in XCode designer. However, I cannot find my class in the drop down in identity inspector, and I cannot locate the generated class when in content assister.
Is there something beyond creating the xib in MonoDev to make my designer class available to XCode designer?
The (C#) class needs to have a Register attribute:
[Register ("MyClass")]
public class MyClass : UITableViewCell
{
}
Per Xamarin support:
When creating a custom UITableViewCell (and wanting to use the
designer), you have to use a bit of a "hacky" process to get the
code-behind file to work. You are going to want to add the class as a
iPhone (or iPad or Universal) UIViewController, change the superclass
of the class you just created to UITableViewCell. Make your changes in
the Xcode designer (delete view and add UITableViewCell), and then
make your changes in your code-behind file.
There is a great tutorial on how to do this here:
http://www.arcticmill.com/2012/05/uitableview-with-custom-uitableviewcell.html