Problem in Shake Event when using Flip View (IPhone)

I have a problem in reacting to a shake event. First problem is that if I place the shake view on root then it works fine, but when i flip to other views and come back it doesn't work at all. Second problem is that if I use shake and then flip to a view which has a UITextField in it then UITextField does not respond and no keyboard appears. I can provide my code if any body wants. Needing to resolve this issue badly.

Regards.

Edit:

Following is the code of root view (where i am using shake event):

enter -(BOOL) canBecomeFirstResponder{
return YES;} 

-(void) viewDidAppear:(BOOL)animated{

[super viewDidAppear:animated];
[self becomeFirstResponder];}

-(void) viewDidDisappear:(BOOL)animated{
[self resignFirstResponder];

[super viewDidDisappear:ani开发者_如何学Gomated];}
-(void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event{

    if(event.subtype == UIEventSubtypeMotionShake)
    {

        iv.transform = CGAffineTransformMakeScale(1.0, 1.0);
        txtviewFortune.text = nil;

        [UIView beginAnimations:nil context:NULL];
        [UIView setAnimationDuration:1.0];


        [UIView setAnimationDelegate:self];
        [UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];


        iv.transform = CGAffineTransformMakeScale(2.0, 2.0);


        [UIView commitAnimations];


    }
}

Just use viewWillDissappear method not viewDidDissappear.