UIButton setTittle not working in a specific case - ios

Question

I have two views in my app and a plist file to store some values.
In the first view I've created a button called frequenciesButton that opens the second view and another button to restore the default values.
In the second view there is a pickerView and a "Done" button.
On the .m of the first view:
- (void)viewDidLoad {
[super viewDidLoad];
//
self.gameSettings = [[NSMutableDictionary alloc] initWithContentsOfFile:gameSettingsFilePath];
}
-(void)viewWillAppear:(BOOL)animated {
[self refreshView];
}
- (void)refreshView {
[self.frequenciesButton setTitle:[NSString stringWithFormat:#"%# hz and %# hz", [self.gameSettings objectForKey:#"freq-freq1"], [self.gameSettings objectForKey:#"freq-freq2"]] forState:UIControlStateNormal];
...
}
- (IBAction)setDefaultValues:(UIButton *)sender {
[self.gameSettings setValue:#880 forKey:#"freq-freq1"];
[self.gameSettings setValue:#1122 forKey:#"freq-freq2"];
...
[self.gameSettings writeToFile:gameSettingsFilePath atomically:YES];
[self refreshView];
}
When the first view is loaded, the button title is changed to the default values stored in the gameSettings dictionary. The method setTitle: works.
When I click on the frequenciesButton it opens the second view with the pickerView, I select the two new values for the freq-freq1 and freq-freq2 and it saves to the plist file on done button.
The problem is that the frequenciesButton title is not changed when the second view is dissmissed and the first view appears. The refreshView method is called but the button setTitle: does not work.
In this case, if I go back one screen, and return to this view, the button title is updated.
And when I click on defaultValuesButton, the frequenciesButton title changes. The method setTitle: also works.
Any ideas of what must be happening?

Answer 1

HaHA! I love that you added a link to your project.
SO!! The problem was that you have separate properties in each view to hold the data from the saved plist file, self.settings. This is fine, don't mesh them together. The requirement you had to do with this, when switching views, is to keep the ivar or properties updated as the data updates too :D
Here is how I fixed the problem:
- (void)viewWillAppear:(BOOL)animated {
self.settings = [NSMutableDictionary dictionaryWithContentsOfFile: filePath];
[self updateView];
}
I checked out the file and that was updated, but the dictionary in the TestViewController.h was not updated
I hope this was the problem :)

Answer 2

One problem there, not sure if it will fix it, is the fact that you have used ViewWillAppear incorrectly, you have this:
-(void)viewWillAppear:(BOOL)animated {
[self refreshView];
}
but it should be this:
-(void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[self refreshView];
}
You need to invoke "[super viewWillAppear:animated];" or you will have side effects, fix that first and see what happens.