I have two methods in my .m file .And i want to access by different values but in my Facebook variable gives nil value but if i use only one line and remove second line of object for key then it work fine for one method .
How i do this which work for my both methods
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[[NSUserDefaults standardUserDefaults] synchronize];
user=[defaults objectForKey:#"userid"];
facebook=[defaults objectForKey:#"FACEBOOKprofile"];
facebook =[defaults objectForKey:#"VLCC"];
if ([facebook isEqualToString:#"VLCCFACEBOOK"])
{
[self FacebookRecord];
}
else if([facebook isEqualToString:#"VLCC"])
{
[self VlccRecord];
}
assume that
Choice-1
// for accessing the both condition in same time
Initially Store the UserDefault value based on your method.
if you are access with facebook , on that time store the string like
[[NSUserDefaults standardUserDefaults] setObject:"VLCCFACEBOOK" forKey:#"FACEBOOKprofile"];
[[NSUserDefaults standardUserDefaults] synchronize];
if you are access with VLCC , on that time store the string like
[[NSUserDefaults standardUserDefaults] setObject:"VLCC" forKey:#"VLCCprofile"];
[[NSUserDefaults standardUserDefaults] synchronize];
and retrieve the both and check like
if ([[[NSUserDefaults standardUserDefaults]
objectForKey:#"FACEBOOKprofile"]isEqualToString:#"VLCCFACEBOOK"])
{
[self FacebookRecord];
}
if([[[NSUserDefaults standardUserDefaults]
objectForKey:#"VLCCprofile"] isEqualToString:#"VLCC"])
{
[self VlccRecord];
}
Choice-2
// for accessing single condition on single time
if you are access with facebook , on that time store the string like
[[NSUserDefaults standardUserDefaults] setObject:"VLCCFACEBOOK" forKey:#"FACEBOOKprofile"];
[[NSUserDefaults standardUserDefaults] synchronize];
if you are access with VLCC , on that time store the string like
[[NSUserDefaults standardUserDefaults] setObject:"VLCC" forKey:#"FACEBOOKprofile"];
[[NSUserDefaults standardUserDefaults] synchronize];
and retrieve the both and check like
if ([[[NSUserDefaults standardUserDefaults]
objectForKey:#"FACEBOOKprofile"]isEqualToString:#"VLCCFACEBOOK"])
{
[self FacebookRecord];
}
else if([[[NSUserDefaults standardUserDefaults]
objectForKey:#"FACEBOOKprofile"] isEqualToString:#"VLCC"])
{
[self VlccRecord];
}
In your code, the [self VlccRecord] method will always get called because you are overwriting the facebook variable.
facebook=[defaults objectForKey:#"FACEBOOKprofile"];
facebook =[defaults objectForKey:#"VLCC"];
If you are looking to append the two strings : Then use the stringbyAppendingString method.
int a = 10;
a = 20;
print >> a; //20
int a = 10;
print1 >> a; //10
a = 20;
print2 >> a; //20
Here,
a = facebook;
print1 = [self FacebookRecord];
print2 = [self VlccRecord];
I believe you'll understand.
Related
I'm making a game in which the user must complete a task as quickly as possible, and I would like to display the user's best time and update the best time when he or she achieves a new one. I have:
float BestTimeValue
float starttime
-(void)start{
starttime += 0.001;
timelabel.text = [NSString stringWithFormat:#"%.3f", starttime];
}
if (starttime < BestTimeValue) {
[[NSUserDefaults standardUserDefaults] setObject:starttime forKey:[#"BestTimeValue"];
}
and in my viewdidload:
BestTimeValue = [[NSUserDefaults standardUserDefaults] objectForKey:#"BestTimeSaved"];
starttime stops when the game is over, but the value won't display in the label. Thanks!
You can't use a float with the setObject:forKey: and objectForKey: methods.
Use setFloat:forKey: and floatForKey:.
if (starttime < BestTimeValue) {
[[NSUserDefaults standardUserDefaults] setFloat:starttime forKey:[#"BestTimeValue"];
}
BestTimeValue = [[NSUserDefaults standardUserDefaults] floatForKey:#"BestTimeSaved"];
[[NSUserDefaults standardUserDefaults] setObject: forKey:] As the name says, it only accept object like NSString, NSNumber, NSDictionary, etc.
So you have to use other method [[NSUserDefaults standardUserDefaults] setFloat: forKey] or save the float in a NSNumber to use the setObjet Method [NSNumber numberWithFloat:thefloat];
Ola, I am trying to find a way to save user scores so when it is closed from the background it saves their scores and when open again it displays that score once again. By the way the thing Im saving is a tap counter so when they tap it has to add onto their previous score.
Any suggestions?
Save:
int numberOfTaps = 42; // some number of taps
NSUserDefaults *standardUserDefaults = [NSUserDefaults standardUserDefaults];
[standardUserDefaults setValue:[NSNumber numberWithInt:numberOfTaps] forKey:#"numberOfTaps"];
Retrieve:
NSUserDefaults *standardUserDefaults = [NSUserDefaults standardUserDefaults];
int savedTaps = [[standardUserDefaults objectForKey:#"numberOfTaps"] intValue];
Updating For Further Information
Just to make it extremely easy:
Copy these methods somewhere in your .m
- (void) saveNumberOfTaps:(int)numberOfTaps {
[[NSUserDefaults standardUserDefaults] setValue:[NSNumber numberWithInt:numberOfTaps] forKey:#"numberOfTaps"];
NSLog(#"Saved numberOfTaps: %i", numberOfTaps);
}
- (int) getNumberOfTaps {
if ([[[NSUserDefaults standardUserDefaults] objectForKey:#"numberOfTaps"] intValue]) {
int numberOfTaps = [[[NSUserDefaults standardUserDefaults] objectForKey:#"numberOfTaps"] intValue];
NSLog(#"Getting numberOfTaps: %i", numberOfTaps);
return numberOfTaps;
}
else {
NSLog(#"No taps saved yet");
return 0;
}
}
Then whenever you want to use these values, you can use the following:
// Save Taps
[self saveNumberOfTaps:14];
// Get Taps
int taps = [self getNumberOfTaps];
NSLog(#"taps retrieved: %i", taps);
It sounds like you're just starting out, so try using NSUserDefaults. Once you need something more advanced, look into Core Data.
I developed a small game , , so I manage something like this , when app lunches for the first time , it save the very first record , then after that it loads and compares the new records with the the first time record . but the problem is when user hit the record it should be saved the new record but it doesn't !!! and saves the first record again ! here is my code :
- (void)manageScores {
NSLog(#"managed");
NSString *tempScore = [NSString stringWithFormat:#"%#",scoreLabel.text];
GO.scoreNumber = [tempScore integerValue];
GO.bestScoreNumber = [tempScore integerValue];
GO.scores.text = [NSString stringWithFormat:#"score:%d",GO.scoreNumber];
GO.bestScore.text = [NSString stringWithFormat:#"best:%d",GO.bestScoreNumber];
if ([[NSUserDefaults standardUserDefaults] boolForKey:#"HasLaunchedOnce"])
{
// app already launched
NSLog(#"app already launched");
[GO loadBestScore];
}
else
{
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:#"HasLaunchedOnce"];
[[NSUserDefaults standardUserDefaults] synchronize];
// This is the first launch ever
NSLog(#"first time lunch ever");
[GO saveBestScore];
}
if (GO.scoreNumber > GO.bestScoreNumber) {
//**************THIS METHOD DOESN'T WORK WHEN USER HIT THE RECORD*********/////
[GO saveBestScore];
//**************//
GO.scores.text = [NSString stringWithFormat:#"score:%d",GO.scoreNumber];
GO.bestScore.text = [NSString stringWithFormat:#"best:%d",GO.scoreNumber];
GO.shareScore.text = [NSString stringWithFormat:#"score:%d",GO.bestScoreNumber];
NSLog(#"new record");
}
if (GO.scoreNumber < GO.bestScoreNumber) {
GO.scores.text = [NSString stringWithFormat:#"score:%d",GO.scoreNumber];
GO.bestScore.text = [NSString stringWithFormat:#"best:%d",GO.bestScoreNumber];
GO.shareScore.text = [NSString stringWithFormat:#"score:%d",GO.bestScoreNumber];
[GO loadBestScore];
NSLog(#"NO NEW RECORD");
}
}
saving and loading scores (methods form GameOver.h/m (GO) )
- (void)saveBestScore {
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setInteger:bestScoreNumber forKey:#"highScore"];
[defaults synchronize];
NSLog(#"BEST SCORE SAVED:%i",bestScoreNumber);
}
- (void)loadBestScore {
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
bestScoreNumber = (int)[prefs integerForKey:#"highScore"];
}
Looks like you should save scoreNumber rather than bestScoreNumber
Reason:
The following code wants to save the best score because GO.ScoreNumber > Go.BestScoreNumber.
if (GO.scoreNumber > GO.bestScoreNumber) {
//**************THIS METHOD DOESN'T WORK WHEN USER HIT THE RECORD*********/////
[GO saveBestScore];
//**************//
GO.scores.text = [NSString stringWithFormat:#"score:%d",GO.scoreNumber];
GO.bestScore.text = [NSString stringWithFormat:#"best:%d",GO.scoreNumber];
GO.shareScore.text = [NSString stringWithFormat:#"score:%d",GO.bestScoreNumber];
NSLog(#"new record");
}
But in saveBestScore, it stores bestScoreNumber, which is the previous highest score number.
[defaults setInteger:bestScoreNumber forKey:#"highScore"];
- (void)saveBestScore
This method doesn't take an argument, but it should.
If you're keeping scores as int, you should modify it to look like this:
- (void)saveBestScore:(int)bestScore
Then, on first launch, call saveBestScore with an argument of 0, just to get it initialize. In fact, if you write saveBestScore method correctly, you don't really need to check whether the app has already launched ever.
- (void)saveBestScore:(int)bestScore {
if (bestScore > [[[NSUserDefaults standardUserDefaults]
objectForKey:#"BestScore"] intValue]); {
[[NSUserDefaults standardUserDefaults] setObject:[NSNumber
numberWithInt:bestScore] forKey:#"BestScore"];
}
- (int)loadBestScore {
return [[[NSUserDefaults standardUserDefaults] objectForKey:#"BestScore]
intValue];
}
I am building an application in which I want to save some user data by using NSUserDefaults, and it is a property of one of my controllers as following:
#property (nonatomic, strong) NSUserDefaults *userPreference;
#synthesize userPreference = _userPreference;
And I am trying to save something called a scale that should be a float, so I do something like this in the getter to put in some default values of scale in case user did not enter one:
if (!_userPreference) {
_userPreference = [NSUserDefaults standardUserDefaults];
}
if (![_userPreference floatForKey:#"scale"]) {
// if user has not entered this info yet
// also 0 is not a valid value so I can do this
[_userPreference setFloat:100.0 forKey:#"scale"]; // let default scale be 100.0
[_userPreference synchronize];
}
However, when I later on query this, no matter what I set in the default value, the following command:
[self.userPreference floatForKey:#"scale"];
always return 1. I am not sure what is happening. Am I not creating the NSUserDefaults correctly?
Thank you in advance!
if you want to use NSUserDefaults, do not create any variables or #propertys. Just use
[[NSUserDefaults standardUserDefaults] setFloat:forKey:]
[[NSUserDefaults standardUserDefaults] synchronize];
to save your data and
[[NSUserDefaults standardUserDefaults] floatForKey:]
for fetching data.
Store using
[_userPreference setObject:[NSNumber numberWithFloat:100.0] forKey:#"Scale"];
[_userPreference synchronize];
and retrieve it using
float value = [[_userPreference objectForKey:#"Scale"] floatValue];
Have you tried this to set the float value:
[_userPreference setObject:[NSNumber numberWithFloat:100.0f] forKey#"scale"];
and the following to retrieve:
CGFloat scale = [[_userPreference objectForKey#"scale"] floatValue];
Change your if condition to this:
if ([_userPreference floatForKey:#"scale"] == 0.0f ) {
NSUserDefaults will always return 0.0f if no value is set for the key. Since you are saying that "also 0 is not a valid", you can safely use this approach
try this
-(void) saveFloatToUserDefaults:(float)x forKey:(NSString *)key {
NSUserDefaults * userDefaults = [NSUserDefaults standardUserDefaults];
[userDefaults setFloat:x forKey:key];
[userDefaults synchronize];
}
-(float) retriveFromUserDefaultsForKey:(NSString *)key {
NSUserDefaults * userDefaults = [NSUserDefaults standardUserDefaults];
return [userDefaults floatForKey:key];
}
[self saveFloatToUserDefaults:6.55 forKey:#"myFloat"];
float x = [self retriveFromUserDefaultsForKey:#"myFloat"];
I use this code to save:
[[NSUserDefaults standardUserDefaults] setValue:#"vruch" forKey:#"nastoikaIP"];
[[NSUserDefaults standardUserDefaults] synchronize];
and this code to load:
NSString* automanual = [[NSUserDefaults standardUserDefaults]
valueForKey:#"nastroikaIP"];
if ([automanual isEqualToString:#"vruch"]) {
autovruch.selectedSegmentIndex = 1;
[self obnovittext];
}
You should not use the method setValue: (from the NSKeyValueCoding protocol) but setObject: (from the NSUserDefaults class) to store the string.
[[NSUserDefaults standardUserDefaults] setObject:#"vruch" forKey:#"nastroikaIP"];
[[NSUserDefaults standardUserDefaults] synchronize];
You can retrieve the string using the method stringForKey:
NSString* automanual = [[NSUserDefaults standardUserDefaults] stringForKey:#"nastroikaIP"];
Finally, note that it is generally better to define constants for the keys you use in NSUserDefaults to avoid any mistyping errors, which may be hard to debug when they happen.
Edit
It looks like you already did a mistyping error nastoikaIP != nastroikaIP. Notice the missing/extra r letter.
Your saving a string so you need to setObject rather than setValue
[[NSUserDefaults standardUserDefaults] setObject:#"vruch" forKey:#"nastoikaIP"];
[[NSUserDefaults standardUserDefaults] synchronize];
and change it for the loading aswell
NSString* automanual = [[NSUserDefaults standardUserDefaults] objectForKey:#"nastroikaIP"];
if ([automanual isEqualToString:#"vruch"]) {
autovruch.selectedSegmentIndex = 1;
[self obnovittext];
}