I realise that there are other topics like this, but none of them really help. I'm trying to get variables from one view into another, but I have absolutely no idea how.
To give some backstory, my game is a fruit ninja like game where stuff goes on the screen and you have to slice it. If 3 sprites leave the screen unsliced, the game is over and it flips to the game over view screen with a button to go back. Additionally, this SHOULD go to the "flipSideView", which is the highscore, but my implementation of the flipSideView transition doesn't work. This isn't the main issue, the main issue is that I don't know how to get the score from the game in the mainView (which stores it as an int) into the flipSideView (which has the player name).
The main view changes to the gameOverView through this condition in the tick method (which performs regular checks and methods for the game)
if (lifeCounter < 1)
{
gameIsOver = YES;
[self showInfo:0];
[self viewGameOverScreen];
}
That goes to the gameOverView, which will sit there until the replay button is pressed with:
- (IBAction)replayAction:(id)sender
{
[self.delegate gameOverViewControllerDidFinish: self];
}
gameOverViewControllerDidFinish restarts the game and dismisses the view.
- (void) gameOverViewControllerDidFinish: (GameOverViewController *) controller
{
[self restart];
[self dismissModalViewControllerAnimated: YES];
}
The restart method just resets the 3 primary values in the main view (The score, the level, the lives).
As it restarts, the game should take the score and whatever name is stored in the text field in the flipSideView (which can be viewed at any one time gameplay) and store it somehow for future reference. It's not supposed to store it in a file yet because that's next week's task.
I don't wanna post the entire program due to plagiarism issues, but if there are additional parts that might make it easier to understand, I will definitely post them.
Thanks in advance,
Christian
Use Search
NSUserDefaults *currentScore = [NSUserDefaults standardUserDefaults];
[currentDefaults setFloat:yourScoreVariable forKey:#"HighScore"];
[currentDefaults synchronize];
Above to store the score.
Below to retrieve the score.
CGFloat fltHighScore;
NSUserDefaults *currentDefaults = [NSUserDefaults standardUserDefaults];
fltHighScore = [currentDefaults floatForKey:#"HighScore"];
Suggestion:
You could put the variable in your Controller class,where they both could access.
It is always better to have sharable data in Controller then views if data has to be shared among views.
Update the shareable data through delegate method.
You can use your app delegate for this. You need to declare your variable there, and then you can access this in the following way throughout your whole app:
TestAppDelegate *appDelegate = (TestAppDelegate *)[[UIApplication sharedApplication] delegate];
NSString *string = [appDelegate.Placemarks objectForKey:appDelegate.title];
Don't know if it's the best way tough...
Luck with it!
Related
I found some threads that discuss this and implemented it into my code, however I'm having an error.
I am trying to do something every 5th launch.
Also the code sets launchAmounts, is that built in into userDefaults, or do I have to declare this somewhere?
I am doing this from viewwillappear in my main view controller.
NSUserDefaults * userDefaults = [NSUserDefaults standardUserDefaults];
NSInteger appLaunchAmounts = [userDefaults integerForKey:#"LaunchAmounts"];
appLaunchAmounts = appLaunchAmounts %5;
NSLog(#"app has been launched = %d", appLaunchAmounts);
[userDefaults setInteger:appLaunchAmounts+1 forKey:#"LaunchAmounts"];
if (appLaunchAmounts==0) {
That code looks like it should work, except for the fact that you have it in viewWillAppear. That method could be called many times in one run if you're switching back and forth between different view controllers. You should put it in the applicationDidFinishLaunching method in the app delegate.
What's not working the way you have it now?
My questions is...how to make....this...
I am trying to make a scollview to show the term&condition at beginning of my app when the user is 1st time using the app.
if the user accepted the T&C (by clicking accept button), this T&C scollview will never show up again at beginning of the app, as he already accepted. So he will be free to use the app in future.
How do I implement this? any suggestions?
Use NSUserDefaults with a key like "TCShown". If the key does not exist in the NSUserDefaults at the beginning of the launch, you show the T&C and create "TCShown" value, set it to YES ([NSNumber numberWithBool:YES];) and store it to the NSUserDefaults.
Edit:
Assuming that you want to present the T&C in your first viewController,
#define kTCViewedFlag = #"tcViewed"
-(void) viewDidAppear {
NSUserDefaults *myDefaults = [NSUserDefaults standardUserDefaults];
if(![myDefaults objectForKey:kTCViewedFlag]) {
//show the TC
}
}
-(IBAction) userAcceptedTC {
[[NSUserDefaults standardUserDefaults] setObject:[NSNumber numberWithBool:YES] forKey:kTCViewedFlag];
[[NSUserDefaults standardUserDefaults] synchronize];
//dismiss the scrollView
}
-(IBAction) userDidDeclineTC {
//handle refusal of TC
}
In addition to Kaan's answer, you can add the TCShown field to the server and update the values accordingly. This will take care of the case when the user who has already accepted the T&C's logs in from a different device.
Maybe you'll find this useful: RLAgreement View Controller
This project allows developers to include
and Agreement, Terms of Service, Non Disclosure Agreement, etc. to an
iPhone App. The controller stores a variable in the user's settings
when the user has a valid agreement and it checks every time the user
opens the App.
I´m building an app for iphone.
I have two views. The first time the user starts the app, i wanna show the 1st view, he pushes a button and go´s to the 2nd view.
The 2nd time he starts the app, i want it to jump directly to the 2nd view.
Can you guys point me in the right direction?
I would use the NSUserDefaults for this
-(BOOL) shouldSkipFirstView
{
//boolForKey returns NO if that entry does not exist or is not associated with a bool
return [[NSUserDeafults standardUserDefaults] boolForKey:#"shouldSkipFirstView"];
}
-(void) skipFirstViewInFuture
{
[[NSUserDeafults standardUserDefaults] setBool:YES forKey:#"shouldSkipFirstView"];
[[NSUserDeafults standardUserDefaults] synchronize]; //optional line
}
-(UIViewController*) getStartupViewController
{
if([self shouldSkipFirstView])
{
[self skipFirstViewInFuture];
return [[[MySecondViewController alloc] init] autorelease];
}
else
{
return [[[MyFirstViewController alloc] init] autorelease];
}
}
You should look into NSUserDefaults. The concept will be to store a value as a preference the first time the app loads and show the 1st view. Then each time your app opens, check if that preference value is set and if so, display the 2nd view.
Create variable and save it to NSUserDefaults so first time when app is loaded set it to true and show view 1 and set it to false. Second time if it is false show view 2 and set it to true.
Code should be in app did finish launching in app delegate.
You just need some kind of record that the app has been opened. You could for example store an object in NSUserDefaults containing the version of the app, which is set on app did finish launching. You can then check to see if there is an object for that key at all, or if the recorded version is lower than the current version of the app (if you want to, for example, show it every time the version changes).
I am making an app that has two tabs, one of which is a "favourite" tab. In the other tab called "search", I have a list of results displayed in a table view, when you tap one, you get to see the detail of that particular result. What I'm trying to do here is, there is a button in the detail view, when it is pressed, the current result gets sent to the "favourite" tab. I tried to use delegate to pass the information, but it didn't work out. Here is my code:
DetailViewController.m
-(IBAction) addSomething {
[self.delegate detailViewController:self addToFavourite:self.something];
}
FavouriteViewController.m, implement the delegate method:
- (void) detailViewController:(DetailViewController *)detailViewController addToFavourite:(Something *)something{
detailViewController.delegate = self;
[thingsList addObject:something];
[theTableView reloadData];
}
Everything is built and fine, but when I click "add" button in the detail view, the data doesn't get sent to "favourite" tab's view. Can anyone help me with this one? Do I need to use core data in this case, I never used core data before. Thanks.
One way to do it that is drop dead easy is storing your information in NSUserDefaults.
NSUserDefaults *defaults = [NSUserDefaults standardDefaults];
[defaults setObject:thingsList forKey:#"myData"];
[defaults synchronize];
When you load your data up in your other tab, just fill it from user defaults.
NSUserDefaults *defaults = [NSUserDefaults standardDefaults];
otherData = [defaults objectForKey:#"myData"];
I probably abuse user defaults more than I should, but it makes for a very easy way to store your data locally and have it persist between runs. It will also backup with iTunes for added persistence. Hope this helps.
I'm programming an application for the hearing-impaired. I'm hoping to take tracks from the iTunes library, and in my app have a slider for panning. I don't want to use OpenAL (this isn't a game - I repeat this is a media player). So since AVAudioPlayer has the easy pan method, can I take selections from the MPMediaPicker and feed them into the AVAudioPlayer so I can pan them?
I dont do a lot of iOS development, but I believe there are two ways.
Method #1
You need to add /System/Library/Frameworks/AVFoundation.framework to your target in Xcode and #import AVAudioPlayer.h as well as You need to add MediaPlayer.framework to your target in Xcode and #import .
For this operation, you need MPMediaPicker to pass the song data to AVAMedia Player. That can be accomplished like this:
#interface MusicPlayerDemoViewController : UIViewController <MPMediaPickerControllerDelegate> {
...
}
...
// This action should open the media picker
- (IBAction)openMediaPicker:(id)sender;
#end
// MusicPlayerDemoViewController.m
- (IBAction)openMediaPicker:(id)sender {
MPMediaPickerController *mediaPicker = [[MPMediaPickerController alloc] initWithMediaTypes:MPMediaTypeMusic];
mediaPicker.delegate = self;
mediaPicker.allowsPickingMultipleItems = NO; // this is the default
[self presentModalViewController:mediaPicker animated:YES];
[mediaPicker release];
}
// Media picker delegate methods
- (void)mediaPicker: (MPMediaPickerController *)mediaPicker didPickMediaItems:(MPMediaItemCollection *)mediaItemCollection {
// We need to dismiss the picker
[self dismissModalViewControllerAnimated:YES];
(Code Continues Below, the blanks are for you to fill in)
AT THIS POINT, CALL THE AVAAUDIOPLAYER CLASS AND TELL IT TO PLAY mediaItemCollection . REMEMBER TO STOP AUDIO BEFORE PLAYING, AS IT WILL PLAY MULTIPLE SONGS AT ONCE.
}
- (void)mediaPickerDidCancel:(MPMediaPickerController *)mediaPicker {
// User did not select anything
// We need to dismiss the picker
[self dismissModalViewControllerAnimated:YES];
}
NOW, ONCE THIS IS DONE THE USER NEEDS TO SELECT A NEW SONG. YOU COULD EITHER CREATE A WHILE LOOP AROUND THE WHOLE THING, WHERE THE CONDITIONAL IS CURRENT TIME >= DURATION (FROM AVAAUDIO PLAYER),
ALTERNATIVELY, YOU COULD CREATE A BUTTON TO OPEN THE PICKER
For more questions checkout:
http://oleb.net/blog/2009/07/the-music-player-framework-in-the-iphone-sdk/ (I used much of their code)
http://developer.apple.com/library/ios/#DOCUMENTATION/AVFoundation/Reference/AVAudioPlayerClassReference/Reference/Reference.html
Good Luck!
Derek
Try having AVAMediaPlayer play the variable mediaItemCollection. This was assigned by the picker to be the song location by the code above. If this does not work make sure that AVAMediaPlayer uses the same input variable type (format, like an ID or a folder location) as MpMediaPicker.
That error message sounds like a technical issue. The only thing I can think of is that AVAAudio player or MPmedia player is looking for a Volume variable (it is required?) and can't find one. I can't really answer this one as I don't do iPhone Development, try there forums or website for some help.
Sounds like you are doing a good job! If you are interested, (I don't know if you are staying at DA) Mr. Cochran (the dean of students at the Upper School) is teaching a iPhone Development Class and a AP Computer Science Class (I am in). If you want to take it further, or you want to just ask questions I know he is more than happy too!
Good Luck! Tell me when it is finished so I can test the results!