Hide Button in another-view from Modal View - iphone

Question

In my iPhone app, I have two UIViewcontroler class firstView and secondView.
From the firstView, I am presenting secondView using presentModalViewController:animated: method.
Problem is that when I am dismissing secondView, I want to hide button in firstView.
Although It does execute the code in firstView [button setHidden:YES];, but still it does not hide the button.
What could be wrong?

Answer 1

Hope you have declared property and synthesized the IBOutlet button.
Make an object of FirstViewController in SecondViewController.h and property and synthesize it.
SecondViewController.h
#interface SecondViewController {
.
.
FirstViewController *firstView;
.
.
}
#property (nonatomic,strong) FirstViewController *firstView;
#end
SecondViewController.m
#implementation SecondViewController
.
.
#synthesize firstView;
.
.
#end
Now when you present a modal view from firstView
FirstViewController.m
-(IBAction)presentModalView {
SecondViewController *secondView = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
secondView.firstView = self;
[self presentModalViewController:secondView animated:YES];
}
Now in SecondViewController where you dismiss SecondViewController just add this code.
SecondViewController.m
-(IBAction)dismissModalView {
[self.firstView.button setHidden:YES];
[self dismissModalViewControllerAnimated:YES];
}
EDIT:
Refer to this link:
#protocol implementation in #interface in Objective-C
EDIT-2: With Protocol implementation
SecondViewController.h
#protocol SecondViewControllerDelegate <NSObject>
#required
- (void)hideButton;
#end
#interface SecondViewController {
.
.
id <SecondViewControllerDelegate> delegate;
.
.
}
#property (retain) id delegate;
#end
SecondViewController.m
#implementation SecondViewController
.
.
#synthesize delegate;
.
.
#end
Now when you present a modal view from firstView
FirstViewController.h
#import <UIKit/UIKit.h>
#interface FirstViewController : UIViewController<SecondViewControllerDelegate>
{
.
.
.
.
}
.
.
#end
FirstViewController.m
-(IBAction)presentModalView {
SecondViewController *secondView = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
secondView.delegate = self;
[self presentModalViewController:secondView animated:YES];
}
#pragma mark - SecondViewController Delegate
- (void)hideButton
{
[self.button setHidden:YES]; //Here button is UIButton you want to hide when second view is dismissed.
}
Now in SecondViewController where you dismiss SecondViewController just add this code.
SecondViewController.m
-(IBAction)dismissModalView {
[delegate hideButton];
[self dismissModalViewControllerAnimated:YES];
}
Let me know if you need more help on this.
Hope this helps.

Answer 2

I would hide the button on the viewDidDissapear method, so when users calls the model the button hides. But this will only work if you cannot show other viewControllers from your firstViewController.
I hope it helps!!

Answer 3

I created two controller, FirstViewController and SecondViewController.
And one button in each controller.
FirstViewController.h
#import <UIKit/UIKit.h>
#interface FirstViewController : UIViewController{
BOOL firstTime;// to hide button
}
#property (retain, nonatomic) IBOutlet UIButton *myButton;
- (IBAction)buttonClicked:(id)sender;
#end
FirstViewController.m
-(void)viewWillAppear:(BOOL)animated{
if (firstTime) {
[myButton setHidden:TRUE];
}
}
- (IBAction)buttonClicked:(id)sender {
firstTime = TRUE;
SecondViewController *secondController = [[SecondViewController alloc]init];
[self presentModalViewController:secondController animated:TRUE];
[secondController release];
}
SecondViewController.h
#interface SecondViewController : UIViewController
#property (retain, nonatomic) IBOutlet UIButton *secondButton;
- (IBAction)secondButtonClicked:(id)sender;
- (IBAction)secondButtonClicked:(id)sender;
#end
SecondViewController.m
- (IBAction)secondButtonClicked:(id)sender {
[self dismissModalViewControllerAnimated:TRUE];
}
This worked for me. Please try it out.