iOS: How to hide a UITextField on settings change? - iphone

Question

I have a settings screen in which I set the units for the app. The user can go from the main screen to the settings screen and after selecting the desired unit, the settings screen is dismissed.
When the user returns to the main screen, I want to hide and show two UITextField.
I tried the following code in viewDidLoad and viewDidAppear but doesn't work:
textBox1.hidden = YES;
textBox2.hidden = NO;
This may be trivial but any help is appreciated. Thanks.
UPDATE:
I have connected the 'Settings' screen with Sugue using push and dismiss the settings screen using [self.navigationController popViewControllerAnimated:YES]; which leads the user back to main screen. Now, I need to refresh the screen controls based on the settings and it's not working

Answer 1

first:
shouldn't it be
self.textBox1 = YES; // or [self.textBox1 setHidden:YES];
self.textBox2 = NO; // or [self.textBox2 setHidden:NO];
Second:
make sure that outlets are not null
NSLog("textBox1 = %#" , self.textBox1);
Third:
Try some code like this
int64_t delayInSeconds = 15.0;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
self.textBox1.hidden = YES;
self.textBox2.hidden = NO ;
});
Do this in your viewWillAppear or DidAppear. Then in 15 seconds you will see the changes if everything is wired correctly.

Answer 2

Set the following bools to yes or no (in the settings screen).
BOOL hideTextBox1;
BOOL hideTextBox2;
Save the variable (in the settings screen):
NSString *hideTextBox1String;
NSString *hideTextBox2String;
if(hideTextBox1 == YES){
hideTextBox1String = #"YES"
}else{
hideTextBox1String = nil
}
if(hideTextBox2 == YES){
hideTextBox2String = #"YES"
}else{
hideTextBox2String = nil
}
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:hideTextBox2String forKey:#"hideTextBox2"];
[defaults setObject:hideTextBox1String forKey:#"hideTextBox1"];
[defaults synchronize];
Retrieve it in the first viewcontroller:
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSString *hideBox1 = [defaults objectForKey:#"hideTextBox1"];
NSString *hideBox2 = [defaults objectForKey:#"hideTextBox2"];
if(hideBox1 != nil){
textBox1.hidden = YES;
}else{
textBox1.hidden = NO;
}
if(hideBox2 != nil){
textBox2.hidden = YES;
}else{
textBox2.hidden = NO;
}
This will make the change permanent untill you change back. Guess that's what youre looking for.

Answer 3

Since setting the text does not work either I am guessing your IBOutlets may be messed up. To re-do them do the following:
First go into your Storyboard & zoom into the view controller that your working on
Control + Click your UITextView or UITextField, you will see a similar menu:
You can see that I have an IBOutlet set named txtCaseID
If you see an outlet set like I do, go ahead and click the X to remove it
To re-add this outlet, open up the Assistance Editor to view the Storyboard & your .h
Control + Click & Drag from your textBox in your Storyboard to the IBOutlet you made previously in your .h like so:
Make sure to do this for both textBoxes.
Let me know if you need any other help--

Answer 4

thank you for taking time.. I just realized the my code for reading the value for the boolean key from NSUserDefaults was in viewDidLoad which only gets called once :)
I moved that line of code to viewWillAppear and everything works as expected!