iOS NSUserDefaults Question?

[jessejohnson147]

Right now I have a button that turns a view's alpha on and off with a if then statement. I have been trying to get the view to stay on or off with the NSUserDefaults with no luck. I think I have seen every tutorial out there for NSUserDefaults can anyone help?

 

[csnplt]

Right now I have a button that turns a view's alpha on and off with a if then statement. I have been trying to get the view to stay on or off with the NSUserDefaults with no luck. I think I have seen every tutorial out there for NSUserDefaults can anyone help?

What's your code look like? Here's what I'd do:

In IB, connect your button to this action method:

-(IBAction)hideView
{
	BOOL isCurrentlyHidden = [[NSUserDefaults standardUserDefaults] boolForKey:@"viewHidden"];
	
	[[NSUserDefaults standardUserDefaults] setBool:(!isCurrentlyHidden) forKey:@"viewHidden"];
	
	if([[NSUserDefaults standardUserDefaults] boolForKey:@"viewHidden"] == YES)
		myView.hidden = YES;
	else myView.hidden = NO;
	
	
}

Now, in ViewDidLoad, set the view up, assuming it was set up in IB:

-(void)viewDidLoad 
{
      if([[NSUserDefaults standardUserDefaults] boolForKey:@"viewHidden"] == YES)
		myView.hidden = YES;
	else myView.hidden = NO;
}

If the app has not been run before, there will be no bool set for the key "viewHidden." NSUserDefaults will return NO for the value, so by default, the view will be shown.

Tell me how this works.

 

[Darkroom]

registering notifications with your objects can make dealing with what's on and what's off a lot more simple when dealing with reading and writing userdefaults.