Question

i am creating a toolbar application, in that application all toolbar icons and actions done successfully.But when i used the icon for next view calling and from that view i am calling a back button then it will crashed..here i am adding my code

/////In View Did load

    objectLabel = [[UILabel alloc]init];
   objectLabel.frame = CGRectMake(10, 10, 300, 40);
   objectLabel.text = @"Press Button";
   [self.view addSubview:objectLabel];
   NSLog(@"label");
   objectToolbar=[UIToolbar new];
    objectToolbar.barStyle = UIBarStyleBlackTranslucent;
   [objectToolbar sizeToFit];
   objectToolbar.frame = CGRectMake(0, 410, 320, 50);
   NSLog(@"toolbar");

   UIBarButtonItem *systemItem1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd
                                                                             target:self
                                                                             action:@selector(pressButton1:)];

   UIBarButtonItem *systemItem2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction
                                                                             target:self
                                                                             action:@selector(pressButton2:)];

   UIBarButtonItem *systemItem3 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera
                                                                             target:self
                                                                             action:@selector(pressButton3:)];
   UIBarButtonItem *flexItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
                                                                          target:nil
                                                                          action:nil];
   NSArray *items = [NSArray arrayWithObjects: systemItem1, flexItem, systemItem2, flexItem, systemItem3, nil];
   [objectToolbar setItems:items animated:NO];
   [self.view addSubview:objectToolbar];

///after that

 -(void) pressButton1:(id)sender{
   // objectLabel.text = @"Add";
       FirstViewController *objectFirstViewController=[[FirstViewController alloc]initWithNibName:@"FirstViewController" bundle:nil];
       [self.view addSubview:objectFirstViewController.view];

   }

 -(void) pressButton2:(id)sender{
objectLabel.text = @"Take Action";
 }  

-(void) pressButton3:(id)sender{
objectLabel.text = @"Camera";
}

///in FirstViewController.m

   -(IBAction)back:(id)sender
    {
      ViewController *objectViewController=[[ViewController  alloc]initWithNibName:@"ViewController" bundle:nil];
      [self.view addSubview:objectViewController.view];
   }

When i clicked the back button it will crashed..please give me the solution

Answer 1

just remove from superview of the current view for ex..

   [self.view removeFromSuperview]; 

 // or  if you want to call the method from your MainViewController use this line [objectFirstViewController removeFromSuperview];