I wanna implement a PSMultiValueSpecifier in my App, so Users can change the Animation of iCarousel. I tried a lot now, but i can't figure out the right code (for my ViewController.m) ..
Maybe you can help me with that..
I wanna have something like that:
if(value 1 clicked) {
self.photoCarousel.type = iCarouselTypeRotary;
}
elseif(value 2 clicked){
self.photoCarousel.type = iCarouselTypeCylinder;
}
... and so on ( i have 6 values).
I really hope, you can give me the code, so i can implement it
My root.plist you can see here:
I load the default value with this code:
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
[userDefaults registerDefaults: [self initialDefaults]];
But i don't know, how to write an if-query to check which value is actually chosen, or which action my program should do then. I hope you understood my question, my english ins't the best, i'm sorry.
It's my first work with the settings.bundle.
Related
I need to save data to NSUserDefault in my iOS Custom Keyboard.
I have successfully created App Groups and entitlement in developer portal and XCode.
Here is how i save my value with UISwitch
- (IBAction)switchAction:(id)sender
{
[self.defaults setBool:self.myKey.on forKey:#"myValue"];
[self.defaults synchronize];
}
and here is how i load value in KeyboardView.
self.defaults = [[NSUserDefaults alloc] initWithSuiteName:#"group.mycompany.customkeyboard"];
if([self.defaults boolForKey:#"myValue"])
{
self.backgroundColor = [UIColor redColor];
}
else
{
self.backgroundColor = [UIColor blackColor];
}
It's doesn't work and doesn't load value.
How can i save and load data?
Initialize your NSUserDefaults object like this in all applications in the app group and they will share the database:
[[NSUserDefaults alloc] initWithSuiteName:#"group identifier"];
Keep in mind everything from the [NSUserDefaults standardUserDefaults] database for each application will not carry over into this database.
The documentation indicates that [NSUserDefaults standardUserDefaults] should return the shared database like the above code does, however it does not. I filed this as a bug (rdar://17164758).
And don't forget to synchronize the database:
[yourDefaults synchronize];
Ok, So I had a look around becuase I had the exact problem. What I did that worked was to add the main app and the extension to a group, Go to main project->Target->Capabilities and create a group (if you don't have one, or make one anyway) like this:
Then, go to the Extension below the target (E), again to Capabilities and add the extension to the group (exactly the same app group as you did for the main target), like this:
Then, once you have done both, in your main app, whenever you want to add something, create a new instance of NSUserDefaults, but for the Suitename equal to the groupname you made earlier. Like this:
NSArray *testing = #[#"first",#"Second",#"Third"];
NSUserDefaults *userd = [[NSUserDefaults alloc]initWithSuiteName:#"The gouprname I made earlier"];//This is exactly the same as the groupname
[userd setObject:testing forKey:#"ExtensionArray"];//set the object you want to share
[userd synchronize]; //It's a good idea to sync, just to be on the safe side.
In your extension's ViewController, use the same group name but to read the user defaults:
NSUserDefaults *sharedD=[[NSUserDefaults alloc]initWithSuiteName:#"Exactly the same groupname that I gave both in the Capabilities and when initialising the userdefault"];
self.testing = [[NSArray alloc]initWithArray:[sharedD arrayForKey:#"ExtensionArray"]];
And Voila! the array is there! I read somewhere that you can even add notification functionality for when the object changes, using a Wormhole class, but I can't find the link to it. I'm sure if you google for Wormhole class, you'll come across it.
I hope I could help, and if you found any more info, please share it with me.
You could load the right data from the containing app, so maybe set a new value in extension app will help.
[self.defaults setObject:newValue forKey:#"thisKeyIsJustUsedForSyn"]
And then load the right data.
This question already has answers here:
Detect when an iOS app is launched for the first time? [closed]
(7 answers)
Closed 9 years ago.
I am developing an iphone app which ask for one time set up details like user name in the first two screens when the user launches the app for the first time. I dont want these 2 screens to come up when I am launching the app once the user has given the details.
I tried getting the info from internet but I was not able to how to find it out. May be I am missing the technical term or wordings involved in doing this. Could any one please help in accomplishing this scenario. Any sample code would be very helpful.
Thanks for your time
Just set a boolean variable to the user-defaults. The user-defaults is a way to save information to the phone, external from the application, that the app can call upon whenever you want.
Inside your app-delegate when it boots, check the user-defaults for a boolean.
To save a boolean to user-defaults:
NSValue *state = ... //Whatever state you want. NSValue allows for booleans.
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:obj forKey:#"notFirstTimeRun"];
[defaults synchronize];
To load the boolean from user-defaults:
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSValue *state = [defaults objectForKey:#"notFirstTimeRun"];
Do a check:
if ([state boolValue] == true){
//Has ran before, skip your UIViews or whatever
}
else{
//Has not ran before, do your setup or whatever.
}
What you are looking to do is basically store a flag that dictates whether the user has gone through the setup steps. And upon app launch, you check to see if that flag exists with the respective value to denote whether or not to show a setup screen. NSUserDefaults provides a really simple, easy way of persisting state across sessions.
How about setting a bool in AppDidFinishLaunching. You can check that bool everytime the app is launched and show or hide respective screen based on that.
This is how I would do it:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
if ([[NSUserDefaults standardUserDefaults] boolForKey:#"HasBeenLaunched"]){
// This is not the first time, therefore open app as usual
} else {
// This is the first time, show special views
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:#"HasBeenLaunched"];
[[NSUserDefaults standardUserDefaults] synchronize];
}
}
I have seen some guides that say to do this, and others that say setting initial values and keys of NSUserDefaults this way will cause problems when an app is updated. I'm hoping I can definitively answer that here. In my appdelegate didFinishLaunchingWithOptions method I have:
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if (![defaults integerForKey:#"totalDays"]) {
// if there is no value for the key, set it to 1
[defaults setInteger:0 forKey:#"totalDays"];
}
if (![defaults objectForKey:#"currentDate"]) {
[defaults setObject:#"32 01" forKey:#"currentDate"];
}
if (! [defaults boolForKey:#"marked"]) {
[defaults setBool:NO forKey:#"marked"];
}
if (![defaults arrayForKey:#"checkedrows"]) {
NSMutableArray *arr1 = [NSMutableArray arrayWithArray:[defaults arrayForKey:#"checkedrows"]];
}
[defaults synchronize];
It might also be helpful to note, you don't "need" default values in there to use them. It might save you time from having to check them for null or zero values later in the app.
As the other answer stated, once values are saved to user defaults, it should persist from update to update and backup to backup. I've been using them for years with no issues with lost or corrupted data.
The data stored in the user defaults are save if the user updates the app. You will not get any problems with your code after an update.
You should not set the default values at all! Instead, use the handy method NSUserDefaults provides for exactly this purpose: -registerDefaults:. Call it early in your program's startup with a dictionary of the default values.
The advantage of this is that because -registerDefaults: is transient, you can tell the difference between "the user hasn't customized this preference" and "the user explicitly set this preference to the default value", which is important if you change default settings in a newer version of the program. It's also a little faster due to not needing to save to the disk.
I got a problem of my iOS app recently. In my app, an instruction view will appear at the first time of running, then hide from then on. How can I implement this effect?
Try to use this function:
- (BOOL) isFirstRun
{
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if ([defaults objectForKey:#"isFirstRun"])
{
return NO;
}
[defaults setObject:[NSDate date] forKey:#"isFirstRun"];
[[NSUserDefaults standardUserDefaults] synchronize];
return YES;
}
In your app delegate check for a key in the user defaults (your own custom key, something like "AppWasAlreadyStartedPreviously"). If the key doesn't exist yet, it's the first run. You can show your instruction view and add the key to the user defaults. The next time the user starts the app you'll find the key in the user defaults and know that it's not the first run.
See the documentation of NSUserDefaults.
Store a file and check if the file exsists every time when you start the app. If tr file does not exsists then show intro, and then create the file.
The only way I think is to store a value into a specified file, when run the app, you should check the value first, and then you can deal with the result whether the app has already been run.
I have an iPhone application that does an action. Let's call it X. I'd like to have a pop up that asks the user if they want to rate my application after they have performed action X ten times. How can I keep track of this? Meaning, if they close the application the value will still be available. Do I need to keep a text file and update the value and write to a file each time or is there an easier way?
Use NSUserDefaults.
You can do something like this to retrieve the value:
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
int timesOpened = [defaults integerForKey:#"timesOpened"];
To save a value you do:
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
int timesOpened = [defaults integerForKey:#"timesOpened"];
[defaults setInteger:(timesOpened + 1) forKey:#"timesOpened"];
[defaults synchronize];
See here for more information
Why not just use L0SolicitReview. It does this, only a little bit different (still in line with what you described, just a few extra constraints). Best of all, it's done for you.
Another option is, use SQLite3 which is already included in iOS SDK. This works for people who are more familiar with SQL than Cocoa.