Hi all, Wondering if this is even possible: A UISwitch in the navbar (I know that is possible) that 'pops up' another UIwidget (in this case a UITextField) on the same screen, then makes it disappear again when the UISwitch is toggled off again. I can get a button to go to another screen, but I haven't yet been able to have a button do something on its 'own' screen. I imagine that the UISwitch would call a method that would already be sitting within the viewDidLoad method of BT_viewController, but the 'pop-up' method would need to be initially "hidden", then magically appear and disappear depending on what the UISwitch is doing. So it seems that I'm looking to somehow call a method within the viewDidLoad method but have it controlled by a customised button in the navbar. Eek. If anyone has any experience with this I would really appreciate any guidance (or even "no way you're crazy" if I'm entering la la land...) Cheers Paddy

Easy. Create the textfiled in the ViewDidLoad method and set it to hidden. In the method for the switch, set the hidden property to true or false.

Thanks Chris, I'm very encouraged! However the method to connect the switch has me beat. Here's what I've tried: 1. In my ViewDidLoad method I create the switch like this: UISwitch *citySearchSwitch = [[UISwitch alloc] initWithFrame:(CGRectZero)]; [citySearchSwitch addTarget: self action: @selector(magicSwitch:) forControlEvents:UIControlEventValueChanged]; UIBarButtonItem *citySearch = [[UIBarButtonItem alloc] initWithCustomView:(citySearchSwitch)]; //Load the switch button... NSArray *actionButtonItems = @[citySearch]; self.navigationItem.LeftBarButtonItems = actionButtonItems; (the array holds two buttons, I'm just de-cluttering for this post) Cool, I have an animated switch (that does nothing yet). 2. Then I create the text field widget that I want to be controlled by the switch and set it to be hidden by default: UITextField *tf = [[UITextField alloc] initWithFrame:CGRectMake(16, 9, 250, 30)]; //other properties etc etc etc ending with... tf.hidden = YES; [self.view addSubview:tf]; And that works because I can show/hide it by changing tf.hidden=YES to tf.hidden=NO and it works fine. 3. ...and now I create a method to change the hidden status of my UITextField, using the magicSwitch selector I specified in Step 1 above. Something like this: - (void) magicSwitch { tf.hidden=FALSE; } And this is where I come unstuck, Xcode tells me that tf is an undeclared identifier - but I thought that I had defined it earlier. There's clearly a connecting step that I'm missing. What am I not doing? Any pointers gratefully accepted! Thanks, Paddy.

You need to declare the textfield as a property in the .h file and synthesize it.

Of course, thank you. [Bangs head on table] That got rid of the error. And I think my magicSwitch method is 'more correct' now too: -(void) magicSwitch { [tf setHidden:FALSE]; } But the switch still isn't connecting with the UITextField. my .h file now has @property (nonatomic, strong) IBOutlet UITextField *tf; and tf is synthesized in .m I know it's something small but it's escaping me...

verify that your magicSwitch method is being called. Add in a debug statement like so: [BT_debugger showIt:self theMessage:@"magicSwitch"]; If it is being called, then "tf" still isn't connected up right. Make sure when you declare the textField, you're not overwriting the property. For instance, if you still have this: UITextField *tf = [[UITextField alloc] initWithFrame:CGRectMake(16, 9, 250, 30)]; then you'll be overwriting the property. Instead, do this; tf = [[UITextField alloc] initWithFrame:CGRectMake(16, 9, 250, 30)]; (notice the slight difference - in the second one, we dropped the UITextField* reference. That's because it's already defined when you setup the property in the .h file.

Thanks Chris... must head off to Easter celebrations but will get back on this tonight. Thank you!! Cheers Paddy

With a fair bit more fiddling, I have it working! Thanks Chris, much appreciated. I'll post the final code in a separate post that will have a more informative topic title. EDIT: Here - https://www.buzztouch.com/forum/thread.php?fid=74A8A995DC1F0A22B2D0D03&tid=74A8A995DC1F0A22B2D0D03 Cheers Paddy.