Load data from NSUserDefaults in ViewDidLoad - ios

Question

In the start screen of my app you are able to choose language between English and Swedish by clicking on either the flag of UK or Sweden.
The problem is that the ViewDidLoad does not recognize changes in the NSUserDefaults when you click a button. But when you restart the app, the language is the latest flag you clicked! So it saves the NSUserDefault but it only loads it the first time in ViewDidLoad..
When you click the English flag, sprakval sets to 0, and if you click the swedish flag, sprakval sets to 1. When you click a flag, it changes to a image with a tick icon in front of the flag.
Code:
-(IBAction) sprakEN
{
sprakval=0;
NSUserDefaults *sprakvalet = [NSUserDefaults standardUserDefaults];
[sprakvalet setInteger:sprakval forKey:#"Sprak "];
[sprakvalet synchronize];
[super viewDidLoad];
}
-(IBAction) sprakSE
{
sprakval=1;
NSUserDefaults *sprakvalet = [NSUserDefaults standardUserDefaults];
[sprakvalet setInteger:sprakval forKey:#"Sprak "];
[sprakvalet synchronize];
[super viewDidLoad];
}
- (void)viewDidLoad
{
[super viewDidLoad];
NSUserDefaults *sprakvalet = [NSUserDefaults standardUserDefaults];
sprakval2 = [sprakvalet integerForKey:#"Sprak "];
if (sprakval2==0)
{
spraklabel.text = [NSString stringWithFormat:#"Language:"];
[lhb setTitle:#"english" forState:UIControlStateNormal];
[hlb setTitle:#"english" forState:UIControlStateNormal];
[fhb setTitle:#"english." forState:UIControlStateNormal];
[blandatb setTitle:#"english.." forState:UIControlStateNormal];
UIImage *encheck = [UIImage imageNamed:#"United_Kingdomchecked.png"];
[enbutton setImage:encheck forState:UIControlStateNormal];
UIImage *seuncheck = [UIImage imageNamed:#"Sweden.png"];
[sebutton setImage:seuncheck forState:UIControlStateNormal];
self.title = #"Game";
}
else if(sprakval2==1)
{
spraklabel.text = [NSString stringWithFormat:#"Språk:"];
[lhb setTitle:#"swedish" forState:UIControlStateNormal];
[hlb setTitle:#"swedish" forState:UIControlStateNormal];
[flb setTitle:#"swedish" forState:UIControlStateNormal];
[fhb setTitle:#"swedish" forState:UIControlStateNormal];
[blandatb setTitle:#"swedish" forState:UIControlStateNormal];
self.title = #"Spel";
UIImage *secheck = [UIImage imageNamed:#"Swedenchecked.png"];
[sebutton setImage:secheck forState:UIControlStateNormal];
UIImage *enuncheck = [UIImage imageNamed:#"United_Kingdom.png"];
[enbutton setImage:enuncheck forState:UIControlStateNormal];
}
// Do any additional setup after loading the view, typically from a nib.
}

Answer 1

This is because you are calling ViewDidload method through its super class in -(IBAction) sprakSE
and -(IBAction) sprakEN
methods. So replace
[super viewDidLoad]; with
[self viewDidLoad]; in both methods. It will work properly.
Hope it helps you.

Answer 2

viewDidLoad is a method invoked after view has been loaded from nib file. You are not supposed to call it manually.
If you have written the code to refresh the controls in viewDidLoad move that into a different method and invoke that method from your button event handler.
- (void)adjustControlsForLanguage
{
NSUserDefaults *sprakvalet = [NSUserDefaults standardUserDefaults];
sprakval2 = [sprakvalet integerForKey:#"Sprak "];
if (sprakval2==0)
{
spraklabel.text = [NSString stringWithFormat:#"Language:"];
[lhb setTitle:#"english" forState:UIControlStateNormal];
[hlb setTitle:#"english" forState:UIControlStateNormal];
[fhb setTitle:#"english." forState:UIControlStateNormal];
[blandatb setTitle:#"english.." forState:UIControlStateNormal];
UIImage *encheck = [UIImage imageNamed:#"United_Kingdomchecked.png"];
[enbutton setImage:encheck forState:UIControlStateNormal];
UIImage *seuncheck = [UIImage imageNamed:#"Sweden.png"];
[sebutton setImage:seuncheck forState:UIControlStateNormal];
self.title = #"Game";
}
else if(sprakval2==1)
{
spraklabel.text = [NSString stringWithFormat:#"Språk:"];
[lhb setTitle:#"swedish" forState:UIControlStateNormal];
[hlb setTitle:#"swedish" forState:UIControlStateNormal];
[flb setTitle:#"swedish" forState:UIControlStateNormal];
[fhb setTitle:#"swedish" forState:UIControlStateNormal];
[blandatb setTitle:#"swedish" forState:UIControlStateNormal];
self.title = #"Spel";
UIImage *secheck = [UIImage imageNamed:#"Swedenchecked.png"];
[sebutton setImage:secheck forState:UIControlStateNormal];
UIImage *enuncheck = [UIImage imageNamed:#"United_Kingdom.png"];
[enbutton setImage:enuncheck forState:UIControlStateNormal];
}
}
viewDidLoad
- (void)viewDidLoad{
[super viewDidLoad];
[self adjustControlsForLanguage];
}
Button Event Handlers
-(IBAction) sprakEN {
sprakval=0;
NSUserDefaults *sprakvalet = [NSUserDefaults standardUserDefaults];
[sprakvalet setInteger:sprakval forKey:#"Sprak "];
[sprakvalet synchronize];
[self adjustControlsForLanguage];
}
-(IBAction) sprakSE {
sprakval=1;
NSUserDefaults *sprakvalet = [NSUserDefaults standardUserDefaults];
[sprakvalet setInteger:sprakval forKey:#"Sprak "];
[sprakvalet synchronize];
[self adjustControlsForLanguage];
}
EDIT : Since you are using tabBar based app, it's better to use the viewWillAppear to reload the language specific controls
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self adjustControlsForLanguage];
}
- (void)viewDidLoad
{
[super viewDidLoad];
}