I am trying to add an extension to Swift so I can format Doubles as found in this answer here
Precision String Format Specifier In Swift
Not ideal, but best solution I can find so far. However I cannot seem to add extensions to my project. Extensions work fine on playground, but when I try to add it to my project, I get the SourceKit service crash error every time I try to add the code in. I also get an error stating "declaration is only valid at file scope".
I have not previously used extensions in Swift before, so I cannot tell if this is directly related to Xcode 6.1 update or not.
Has anyone else had this issues or know anyway to solve this?
The SourceKit service crash error is pretty annoying and doesn't only happen with Extensions. I have found breaking your project up into different files has helped.
Related
Created a new question here with simpler example.
I have encountered some odd behavior from Xcode, including giving incorrect variable values and giving me syntax errors in older projects that compiled fine when I left them.
What is the best way of getting back to a clean Xcode?
Are there issues having two (or more) Xcode executables in the Applications directory? I am only running one version at a time...
Is it possible to completely remove all program data files and cache files, as if I've never installed Xcode?
If not, is there a list of caches/etc that can be safely deleted?
Here's what I've tried so far, based on Stack Overflow searches:
Clean project (CMD+OPT+K). Restart Xcode. Reboot Mac
Downloaded Xcode 9.4.1. Running this version (didn't delete Xcode
10). Can run either version
Verified Swift version was set to 4.1 (4.2 was not an option)
Deleted Derived Data folder. File> Project Settings.. Clicked on
right arrow next to Derived data folder. Deleted specific project
file. Also tried deleting entire folder
Here is my long tale of woe: I have been working on a project for about 6-8 weeks, using Xcode 9.4.1 on High Sierra. I am a novice, so I created some simple "proof of concept" apps to learn about text views, attributed strings, web views, etc. Each of these small projects compiled and ran fine.
I combining these features into a single app, and adding a Cocoa Pod library. Again, everything compiled fine. I was debugging simple issues in the code. At one point, Xcode stopped showing correct values in the Variable display for my code. I was reduced to debugging with print() statements, which always showed correct variable values.
I upgraded (?) to Xcode 10, then later to Mojave to try to resolve Xcode's incorrect variable values. Other issues emerged, including known issues with evaluateJavaScript. So I decided to revert back to pre-Mojave to get back to a working state. I used Time Machine to revert back to Xcode 10 under High Sierra.
Now my projects give compile errors. Even my simple proof of concept apps have compile errors. So I've been trying to get back to compilable code.
What else should I try to determine what has changed?
Here is the specific attributed string code that is generating syntax errors:
let titleAttributes = [NSAttributedString.Key.font: NSFont.boldSystemFont(ofSize: 22)]
gives error:
Type 'NSAttributedString' has no member 'Key'
I'm also getting an error on a segue:
performSegue(withIdentifier: "showSecondVC", sender: self)
gives error
Cannot convert value of type 'String' to expected argument type 'NSStoryboardSegue.Identifier'
Apologies for the long post. Under Unix, it's easy to get a user account or app back to a known initial state. It seems a lot harder under Mac OS X...
Thanks for any suggestions!
The problems you talk seem originated by Swift version.
To answer to your question, when you download a new Xcode App (and yes, you can have more than one Xcode app in the same computer) everything is inside the huge app.
All the local data are inside the folder
~/Library/Developer/Xcode/
Where you can find several folders with lot of data. If you have problems with Ide size you could check the "IDEPreferencesController.xcuserstate" that is found inside UserData folder.
I don't really understand what's hapening but I'm not able to see all my Swift files on Xcode project navigator, but when I open my project directory I see them all, it looks like reference problems.
I'm receiving some invalid redeclaration problems.
Are you using the one of the xcode-beta builds? They seem to have some problems with file handling every now and then. Restarting fixes it for me most of the times.
I have encountered a situation where xcode stops auto-completing and if you try to write a variable that already been defined xcode says << error type>>.
Here is my error:
I have started to see same errors after Xcode 6.1 and iOS 8.1 update. I have found that if you delete ModuleCache file at /Users/username/Library/Developer/Xcode/DerivedData/ModuleCache path, it fixes the error temporarily. And you don't have to close Xcode or the project while doing that. After deleting the file, just wait for Xcode a little to index the project files again. After that, the problem mostly resolves for some time.
As it doesn't solve the problem permanently, you should avoid writing codes causing this according to other answers till Apple solves this.
Often this indicates that your code doesn't currently compile. Swift often has trouble computing types on code that itself isn't correct. In some cases it's a bug in the compiler. Use of AnyObject can be particularly confusing to the compiler, and should be avoided as much as possible. In this case, AnyObject is required, but you should try to get it converted to a specific type quickly. Don't return [AnyType] for instance if you can possibly help it.
But the short answer is that the Swift compiler is still evolving, and it can't always work out types in complex situations, particularly on partial or (currently) incorrect code.
Note that you're using var for a lot of things that should be let. Unless you actually need to modify the variable, you should prefer let. It helps you prevent many kinds of bugs, and can be easier on the compiler to deal with (since the variable has fewer ways it can change).
<<error type>> can result from the Swift compiler not finding the header file.
Same module:
Do you have some sort of folder structure that your source code is in? If so, try setting Scan All Source Files for Includes to YES.
This will make Xcode look through all of those folders when trying to find the Header file.
Embedded Projects, multiple modules etc:
1. Check the Search Paths
Have a look where the file in which your type is defined is stored.
In your Build Settings make sure that this location is included in the Search Paths.
If it is part of the User Header Search Paths, make sure, that Always Search User Paths is turned on.
2. Check dependencies
Have a look at superclasses etc of your type. Are they included in the Search Path as well?
Found out that the error goes away and autocomplete works again if i initialised the variable like this:
var name: String = "my name"
instead of :
var name = "my name" as String
Firstly, try CMD-SHIFT-K followed CMD-R to clean and then run the build.
If that doesn't work, close XCode, delete derived data, and reopen XCode.
I faced the same issue recently. I tried running the whole project on an emulator, it resolved all the <<error type>>
I switched my build destination from Any iOS Device (arm64) to one of the available iOS Simulators, and that fixed the issue for me.
For me, simply restarting my computer resolved this issue.
Suddenly flash builder stops identifying data members of a class. When I type obj. the intellisense window does not show any data members or methods. Yesterday I got problem with 4.6 and now with 4.0. Yesterday I imported the source files into new project to resolve this problem. I thought it is something to do with the newer version but I got this in 4.0 as well. This is really a huge problem.
I did all tries like
Reopening project
Restarting FB
Triple checking the import packages/classes
Syntax error
It is similar problem with many of people got here and I am sure it is not a problem of importing packages/classes or any syntax because It happens all the sudden randomly to random class.
Not just that but when I ctl+click on the variable (which should tame cursor to the variable declaration) IDE throws an error message "Code Navigation error: Source could not be found"
I am not pasting any code here because, as I said earlier I am sure its not related to any syntax, importing issue (in short not a coding isssue), but just some sort of FBs memeory/stack or something else.
Please let me know if any one has faced this problem and found the solution other than copying the source into a new project
I've got an incredibly annoying issue that is hampering my workflow. In my project I have "User of undeclared identifier" errors all over. They are all in reference to a single class, specifically a Theme class. I checked for any circular referencing with my imports, none. I'm really confused.
Here is a screenshot of the errors. I would post errors in the Build Log for more detail, but there aren't any. It builds and runs just fine...
I've tried cleaning, deleting the derived data... Any ideas?
I was having the same problem and noticed that all of the undeclared identifiers were declared in files that were in my pch file.
With this in mind I deleted one of the #import lines from the pch file and recompiled which failed as expected. I then put the deleted line back in, recompiled and it compiled normally with all the false errors gone.
Hopefully this simple solution helps a few of you out if the above solutions don't.
These kinds of errors are quite common with Xcode, unfortunately. It would be great if it would auto-refresh its error list all the time, but it doesn't always. When this happens, I strongly suggest that you restart Xcode, which will flush its error cache and hopefully solve your issues.
How are you including this class? In most cases I just include the class explicitly in header and/or body - instead of the *.pch file. Then this error goes away in my case.
Also deleting the derived data workes once in a while. Did you change the location in preferences recently by any chance. I also got this error when I use a ramdisk for derived data and then go back to default. This is the most annoying case - since it causes this error to appear then in almost every file.
This error seems to happen more often in Xcode 4.4 than the prior versions.
Have you included the library files correctly? Take a look at that. Sometimes ARC issues might occur if we don't include the correct file, or something's missing or not connecting UI.
For me the issue was that I created UnityInterface.h/m file to handle the obj-c to c# interface. UnityInterface.h is already defined by Unity. I renamed my own UnityInterface to _UnityInterface and now everything works.
Just posting this for anyone who might have this problem later and doesn't find any of these solutions to work:
If you have any pragma marked #if statements that only execute if the program is in debug mode it will obviously cause anything declared inside of them to not be declared when you try to archive/export.
I had the same problem. Closing and opening XCode didn't help.
I solved it by checking errors in other targets and fixing them (I had tons of errors in my unit testing target). Also I moved header links from h files to m files. But I'm pretty sure, that the first thing was critical.
For others who experienced the same problem and tried all solution above with no result, perhaps you should try something like I did. I solved the problem simply by unplugging my iPhone USB cable from my Mac and then replugged again those cable. After that, rebuilt again and all undeclared identifier errors were gone.
I had the same error. In my case, it was on this line of code:
- (void)playerItemDidReachEnd:(NSNotification *)notification {
// some code
}
My error message said:
Use of undeclared identifier 'playerItemDidReachEnd'
I tried added this line to the .h file:
- (void)playerItemDidReachEnd:(NSNotification *)notification;
I cleaned it, I re-booted my macbook, and I was still getting the error.
Finally, I decided to try to delete the line in the .h file. I then pasted it into a text file, and then copied and pasted it back in to the .h file.
Now I cleaned and VOILA' !!! no more errors. Go figure. This happens sometimes in VBA. Somehow there seems to be unseen formatting in a line of code. So I thought it might be happening with xCode. Cutting it out, pasting into a text file, cutting out of the text file, and pasting it back in right where it was - fixed it in my case.
---- UPDATE -----
The above was posted as my answer. Apologies, apparently there's something else wrong.
After cleaning - my ERRORS were gone. Now I tried to build and run my app. THE ERRORS CAME BACK! So this time I re-created the class files after cutting out all the text, and pasting it into a text file. I did it for both my .m and .h files. But now the errors are back again after trying to run. SORRY. I don't know how to delete this text altogether cuz it is not an answer.
Tried to build and run my app. THE ERRORS CAME BACK!
There was also an error msg that I was missing a bracket ( } ). Finally I looking at the method just before this method, and sure enought it was missing the ending bracket! That was it!
Might be little late in answering.
I had this issue very recently. I fix this by updating my OS and then updating Xcode. I tried updating Xcode alone but did not happen because Xcode 9.4 requires OS High Sierra 10.13.*
Happy Updating :)
It it compile time error
Use of undeclared identifier '<class_name>'
I was run into this issue when developing own framework and app. Objective-C consumer -> Objective-C static framework
Report Navigator had a clear description
umbrella header for module '<module_name>' does not include header '<class_name>.h'
The solution was just to add #import <class_name>.h into umbrella header in a framework target
Try to click Product -> Analyze, after that to Product -> Build. This helped for me.