I'm trying to make an SDL application in Xcode, but I'm having trouble loading images. I'm using this template, because I couldn't get it to work when made from scratch.
Whenever I try to load an image with SDL_LoadBMP however, it returns NULL unless I give the absolute path. (/Users/Cole/code...) I looked in the exported .app file, and it does have the image I want to load in Contents/Resources/, and I've tried every combination I can think of to get at those (../Resources/image.bmp, ect.) but I can't seem to get it working.
Does anyone have a solution? I'm running Mac OS 10.7 with Xcode 4, so I can't use the templates that is within the SDL download.
Also, I tried using SDL_ttf, but I get this error:
warning: Unable to read symbols for #executable_path/../Frameworks/SDL_ttf.framework/Versions/A/SDL_ttf (file not found).
warning: Unable to read symbols from "SDL_ttf" (not yet mapped into memory).
There does not happen to be a Frameworks folder where it's looking, but somehow it finds the regular SDL framework just fine.
You can get the path to your the Resources directory containing your file with
NSString *path = [[NSBundle mainBundle] resourcePath];
or alternatively (in theory more clean as it can access localized files) you can get the full file name with
NSString *file = [[NSBundle mainBundle] pathForResource:#"image.bmp" ofType:nil];
You'll need to pass the C string to SDL_LoadBMP, so either of the two:
SDL_LoadBMP([[path stringByAppendingString: #"/image.bmp"] UTF8String]);
SDL_LoadBMP([file UTF8String]);
I had the same problem and found a way without using any objective-c.
In xcode click on your target then go onto the build phase section
Then in the top bar click: Editor -> Add Build Phase -> Add Copy Files Build Phase
Now change the destination of the newly created phase to "Products Directory" and then add any subpaths if needed.
All you need to do now is add your image onto the list below and it should work!
Related
Question
Is it possible to determine the location a macOS app was launched from at runtime?
Context
I develop a Safari Extension, and in order for the extension to be enabled the application needs to be present /Applications/. Several users have tried to run the application directly from the DMG file and then complained that the extension doesn't appear in Safari's extension settings. I would like to detect this and alert them that they need to move the file.
You can use NSBundle, specifically the bundlePath property. The documentation says:
The full pathname of the receiver’s bundle directory.
And you can use it something like this:
NSString* bundlePath;
bundlePath = [[NSBundle mainBundle] bundlePath]
NSLog(#"%#", bundlePath);
There's also bundleURL if you want a NSURL to work with instead of a string.
What is the database location of a MacOS application when using Core Data ?
I searched everywhere on my Mac and did't find it.
I Have the hidden files OFF and I'm sure there is data in my database.
Also I don't use app Sandbox.
If you have sandboxing enabled for your app, it will be placed under ~/Library/Containers/app.bundle.id/Data/Library/Application Support/AppTargetName where app.bundle.id is the Bundle Identifier specified in your app's target and AppTargetName is the name of that target, i.e. the name of the generated .app file. In that folder you should find the SQLite files that contain the database data.
Look for the persistentStoreCoordinator method in your AppDelegate.m. There is a line
NSURL *applicationDocumentsDirectory = [self applicationDocumentsDirectory];
Just add
NSLog(#"myDirectory: %#", applicationDocumentsDirectory);
This assumes you started your project with Xcode 8 Cocoa template with "use Core Data" option.
Or add
NSLog(#"Array of CD stores: %#", self.persistentStoreCoordinator.persistentStores);
to applicationDidFinishLaunching, for example. The resulting path should be in your user's library Users/<user>/Library/Application Support/<whatever>/<appname>.storedata.
Ask your NSPersistentStoreCoordinator.
I'm in the process of learning how to use xcode and how to write applications for the Mac.
So, I have a simple screensaver that loads an external file which works fine. I decided that it would be better to embed the html source in the application to reduce the external dependancies.
I dragged the HTML file to the resources folder, it's at the top level there's no sub folder or anything.
I made sure the Add to targets had my application in it, along with selecting 'create folder references' and 'copy files if needed'. I use the following to get the url to the file, but it returns nil
NSURL *fileUrl = [[NSBundle mainBundle] URLForResource:#"embedded" withExtension:#"html"];
System Preferences[10185]: fileUrl returned (null)
I've read through all the other SO issues for the similar problems but none of the fixes seem to apply. I've gone through and checked them.
If I show the package contents of the final build the embedded.html is in there. Am I missing something really obvious?
edit to add
In build phases it's listed in Copy Bundle Resources
xcode version is 6.1.1
After some considerable digging and a smidgeon of luck I found that
NSURL *fileUrl = [[NSBundle mainBundle] URLForResource:#"embedded" withExtension:#"html"];
is incorrect and I should be using
NSURL *fileUrl = [[NSBundle bundleForClass:[self class]] URLForResource:#"embedded" withExtension:#"html"];
instead.
i.e. NSBundle bundleForClass:[self class] and not NSBundle mainBundle will give access to a screensaver bundle.
Might be obvious, but only if you know ;)
See Apple Developer NSBundle Class Reference
I had a similar problem. The answer for me was to check the Target Membership of object's identity.
Quitting and restarting Xcode fixed this for me.
using this solved my problem [myBundle URLForResource: withExtension: subdirectory: ]
Subdirectory queries to NSBundle URLForResource need to specify the subdirectory. Otherwise it returns nil.
One hour figuring this today :'(
I met a same issue in a MAC application. After several hours, I found an easy way to fix it.
1, Make sure there is a phase named "Copy Files" under "Build Phases". If not, please add one.
2, Add your resources into the phase.
3, Rebuild your project and you can find your resources located in ~/Library/Developer/Xcode/DerivedData//Build/Products/Debug/.
I would like my OS X app to open a sample document located in the application bundle.
I'm currently doing the following:
NSString* path = [[NSBundle mainBundle] pathForResource:#"tutorial.doc" ofType:nil];
[_documentController openDocumentWithContentsOfURL:[NSURL fileURLWithPath:path] display:YES completionHandler:nil];
This works but has an unexpected effect: if I make changes to the document and save, the next time I open the bundle document the changes persist. I expected the bundle document to be read-only.
What am I doing wrong? How can I prevent this sample document to be modified?
You can use the duplicateDocumentWithContentsOfURL:copying:displayName:error: method instead. This creates a copy of the document the user can play with (and save to some other location if he wants to). This method is available only on OS X 10.7 or later though.
I've made many apps in Xcode before and always their default working directory was the one where the .app file is, so I've accessed the internal data like Whatever.app/Contents/Resources. I know it's probably not the right way, but it has always worked. Anyway, either from a recent Xcode update or for some other reason, their default working folder is now being set to "/". This only happens when I run the .app file from Finder. If I run it from within Xcode, the folder path is correct (I can set that path in the executable options, but it has no effect on what happens when you run the .app directly). Is this a setting somewhere or just the new standard?
For resources, use this cool code:
NSString *path = [[NSBundle mainBundle] pathForResource:#"awesomepic" ofType:#"png"];
You should never depend on PWD with Cocoa. Instead, use Cocoa API's whenever possible. BSD API's should only be used if Apple provided no other way.
globheader.h
static char *appdir;
appcontroller.m
#import "globheader.h"
#implementation AppController
- (void)method {
appdir = [[[NSBundle mainBundle] bundlePath] UTF8String];
}
#end
cppcode.cpp
#include "globheader.h"
int main() {
printf("%s", appdir);
return 0;
}
toastie, why use the application bundle to store data? don't change your .app.
Instread, use the application support folder. You can modify the bytes in that folder with no problems. Read the following post from Matt Gallagher,
http://cocoawithlove.com/2010/05/finding-or-creating-application-support.html
regards,