I know that there are other same questions as mine. But I think that I have tried everything and I still can't be able to find the NSUserDefaults plist file in my simulator folder. I made sure that I got the right ID for the simulator and I wasn't able to find the NSUserDefaults plist as I want to check exactly what values are being saved. Does anyone know what is the exact name of the file that I should be searching for?
For info, I am searching in the following path:
/Users/username/Library/Developer/CoreSimulator/Devices/<device_id>/data/Library/Preferences
Does anyone know if I am doing it wrong? How can I find that file?
Thank you for your help!
you can print the location by asking at runtime.
Each time you compile and run simulator the folders may differ from before.
how to write NSUserDefaults
NSUserDefaults *userdef = [NSUserDefaults standardUserDefaults];
[userdef setObject:#"testString" forKey:#"testkey"];
[userdef synchronize]; //dont forget synchoniszing after setting new objects
how to read NSUserDefaults
NSUserDefaults *defs = [NSUserDefaults standardUserDefaults];
NSString *result = [defs objectForKey:#"testkey"];
NSLog(#"read out userdefs = %#",result);
If you did not set any NSUserDefaults yet, there is no file.
Otherwise where is your <BundleIdentifier>.<appName>.plist ?
NSArray *path = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
NSString *libraryFolder = [path objectAtIndex:0];
NSString *appID = [[[NSBundle mainBundle] infoDictionary] objectForKey:#"CFBundleIdentifier"];
NSString *userdefFile = [NSString stringWithFormat:#"%#/Preferences/%#.plist", libraryFolder, appID];
NSLog(#"NSUserDefaults File located at: %#", userdefFile);
Related
I have an app settings file which displays the version number for our app. The idea is to update the Root.plist on compile so that we don't have to update two places rather than one. We update theBuild settings version and would like those settings to update the Root.plist on compile.
This code extracts the information for the build settings, how do I update the Root.plist file?
NSString *appBuildNo = [[NSBundle mainBundle]objectForInfoDictionaryKey:#"CFBundleShortVersionString"];
NSString *appBuildVersion = [[NSBundle mainBundle] objectForInfoDictionaryKey:#"CFBundleVersion"];
NSString *appBuildStr = [NSString stringWithFormat:#"%# Build %#", appBuildNo, appBuildVersion];
NSURL * settingsURL = [[NSBundle bundleWithURL:[[NSBundle mainBundle] URLForResource:#"Settings" withExtension:#"bundle"]]
URLForResource:#"Root" withExtension:#"plist"];
NSDictionary * settingsDict = [NSDictionary dictionaryWithContentsOfURL:settingsURL];
NSArray * settingsArr = [settingsDict objectForKey:#"PreferenceSpecifiers"];
NSUserDefaults * defaults = [NSUserDefaults standardUserDefaults];
for( NSDictionary * setting in settingsArr ){
NSString * key = [setting objectForKey:#"DefaultValue"];
[defaults setValue:appBuildStr forKey:key];
[defaults synchronize];
break;
}
The idea is that defaults updates Root.plist but it is not working. Any help would be appreciated
Droppy was very helpful in helping me to fix this. After setting up my Settings Bundle and the Root.plist file, I added the following code to my AppDelegate and called it from the didFinishLaunchingWithOptions.
- (void)updateVersionInfo
{
//This method updates the Root settings to display current Version and Build No in Settings Bundle
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSString *appVersionNumber = [[[NSBundle mainBundle] infoDictionary] objectForKey:#"CFBundleVersion"];
NSString *appBuildNo = [[NSBundle mainBundle] objectForInfoDictionaryKey:#"CFBundleShortVersionString"];
NSString *versionNumberInSettings = [NSString stringWithFormat:#"%# Build %#", appBuildNo, appVersionNumber];
[defaults setObject:versionNumberInSettings forKey:#"version"];
}
This code then adds the contents of the Version in the info.plist file to my Settings Bundle.
This question already has answers here:
File write with [NSBundle mainBundle] fails
(5 answers)
Closed 8 years ago.
I'm reading and writing variables to a text file in my app.
It works perfectly fine when testing it in the simulator, but somehow when testing it on the iPhone it can only read the file but not write/save anything
Here's my method for saving my variables ("\n" is used for line breaking):
NSString path = [[NSBundle mainBundle] pathForResource:#"settings" ofType:#"txt"];
- (void)saveSettings {
[[NSString stringWithFormat:#"%d\n%d", firstInt, secInt] writeToFile:path atomically:YES encoding:NSUTF8StringEncoding error:nil];
}
As I said: works in the simulator but doesn't work on any iDevice.
Does anyone got a idea why it's not working? Changing "atomically" to "NO" does nothing
You can't write to the bundle. Among other reasons because the bundle is part of the signature in the app and that can't be changed. You can write to other directories, en particular the Documents directory
NSArray *paths = NSSearchPathForDirectoriesInDomains
(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *write_file = [NSString stringWithFormat:#"%#/settings.txt",
documentsDirectory];
You will be able to write to write_file.
Short answer: You can't write into the main bundle.
Long answer: You should really use the preferences for this:
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
[prefs setObject:[NSString stringWithFormat:#"%d\n%d", firstInt, secInt]
forKey:#"yourPref"];
BOOL saved = [prefs synchronize];
or even better, like that:
NSInteger firstInt = 0;
NSInteger secInt = 0;
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
[prefs setInteger:firstInt forKey:#"firstInt"];
[prefs setInteger:secInt forKey:#"secInt"];
BOOL saved = [prefs synchronize];
even after so many research i haven't found a solution for this question. I am currently working on a app which uses 3 view controllers for Registration with a log out button. the last view controller has the Register button which saves all the details of registration in a web service. But if the user has filled the two view forms and logs out. The two view filled forms field should be saved in the local memory and wen the user logs it again the pre filled forms should load the fields saved in internal memory just to continue the Registration for webservice. Any idea how to implement this sort of functionality
As others have said, NSUserDefaults will suffice for what you need.
NSUserDefaults *registrationInfo = [NSUserDefaults standardUserDefaults];
Guessing you have text fields with the info you need. So pull out the text and save to a key like this.
[registrationInfo setObject:self.someTextFieldName.text forKey#"firstTextField"];
After repeating this for every text field(use different key names though), call this [registrationInfo synchronize];
To pull the data out, you open the defaults again just like the first line. And to retrieve a specific key: NSString *firstTextField = [registrationInfo objectForKey:#"firstTextField"];
To make this easier, you can also put all of your strings in an array or dictionary, and then add that as an object in your defaults. Then you only have to set/get once.
If you have large amount of data to save use CoreData else you NSUserDefaults to save it.
I suggest you to use PLIST There are mainly three steps to do this.
1) Generate .plist file.
NSError *error1;
BOOL resourcesAlreadyInDocumentsDirectory;
BOOL copied1;
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath1 = [documentsDirectory stringByAppendingString:#"/epub.plist"];
resourcesAlreadyInDocumentsDirectory = [fileManager fileExistsAtPath:filePath1];
if(resourcesAlreadyInDocumentsDirectory == YES) {
} else {
NSString *path1 = [[[NSBundle mainBundle] resourcePath] stringByAppendingFormat:#"/epub.plist"];
copied1 = [fileManager copyItemAtPath:path1 toPath:filePath1 error:&error1];
if (!copied1) {
NSAssert1(0, #"Failed to copy epub.plist. Error %#", [error1 localizedDescription]);
}
}
2) Try to read(open) it.
NSMutableDictionary* dict = [[NSMutableDictionary alloc] initWithContentsOfFile:filePath1];
3) write data to plist file.
[dict setObject:[NSNumber numberWithInt:value] forKey:#"value"];
[dict writeToFile:path atomically:YES];
This is a simple way to use it. I suggest to use .plist file in place of NSUserDefaults.
So i would like to make a file called "SavedData.h" "SavedData.m" and store all my games saved data in these files...
How would I wire the whole process up to run in my "MainView.h" and "MainView.m"
I'm not that experienced with xcode...
The action in the MainView.m:
- (IBAction)btncheck:(id)sender {
if ([answer isEqualToString:#"Pizza Pie"]) {
//Name:Pizza Pie *SAVED
NSString *savestring = _textbox.text;
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:savestring forKey:#"savedstring"];
[defaults synchronize];
}
_textbox is my textField
and in my SavedData.m:
//Name:Pizza Pie
{
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSString *loadstring = [defaults objectForKey:#"savedstring"];
[_textbox setText:loadstring];
}
How is this done?
& is it even possible?
I think you're aiming to save state to a file and restore it later (you wouldn't use source files for this, there's no compiler on the phone). Steps are:
Put whatever you want to save in a dictionary:
NSMutableDictionary *myState = [NSMutableDictionary dictionary];
myState[#"foo"] = #"bar";
Get a path to where you're app is allowed to save:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *pathFile = [paths[0] stringByAppendingPathComponent:#"mystate.plist"];
Save:
[myState writeToFile:pathFile atomically:YES];
Read it later:
myState = [[NSDictionary alloc] initWithContentsofFile:pathFile];
You can also build a mutable dictionary this same way (replace NSDictionary in the last line with NSMutableDictionary).
I'me trying to save a variable into hard drive to load it on my app startup. I do the following:
paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
documentsDirectory = [paths objectAtIndex:0];
votesFile = [documentsDirectory stringByAppendingPathComponent:#"votes.dat"];
Yet, this is creating no file, at least that I can see. When I try to do this:
[votes writeToFile:votesFile atomically:YES]; //votes!=nil
and then
votes = [[NSMutableDictionary alloc] initWithContentsOfFile: votesFile];
it does nothing for me, votes == nil
What am I missing here?
If you are using a NSDictionary with NSStrings as keys, and NSNumbers as values, those classes are compatible with Archiving and Unarchiving pattern, so you can use NSUserDefaults to store your data, and load it the next time you run the application.
To save your data:
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:yourVotesDictionary forKey:aKey];
[defaults synchronize]; //This is very important when you finish saving all your data.
To load your data:
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSMutableDictionary *votes = [defaults objectForKey:yourNSString];
As you can see, NSUserDefaults is a dictionary, and it behaves like that.
Hope it helps,
have a good day.
There can be various errors using writeToFile:atomically: which is why it returns a BOOL. You should have something like:
if(![votes writeToFile:votesFile atomically:YES]) {
NSLog(#"An error occurred");
}
If you are getting an error there you have an issue with your NSDictionary.