motionBegan: Not Working

I am running into a bit of a problem when I attempt to use (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event in order to capture a shake event. The problem is that the function isn't even running, even when I override canBecomeFirstResponder and set it to return YES. I have seen some other people's posts with this problem, but I have not found an answer.

Thanks for any help!

First Example .h (class inherited from UIView - Is "called" from the app delegate class) {

@class TestApplicationView;

@interface TestApplicationView : UIView {

    IBOutlet UIView *view;
}

}

First Example .m {

- (id)initWithCoder:(NSCoder *)coder
{
    [self setUpView];
    return self;
}

- (id)initWithFrame:(CGRect)frame
{
    [self setUpView];
    return self;
}

- (void)setUpView
{
    [self becomeFirstResponder];
    NSLog(@"First Responder - %d", [self isFirstResponder]);
}

}

Second Example .h (class inherited from UIApplicationDelegate and UIScrollViewDelegate) {

#import <UIKit/UIKit.h>

@class TestApplicationViewController;

@interface TestApplicationAppDelegate : NSObject <UIApplicationDelegate, UIScrollViewDelegate> {

IBOutlet UIWindow *window;
IBOutlet UIScrollView *scrollView;
}

}

Second Example .m {

- (void)applicationDidFinishLaunching:(UIApplication *)application
{
    [self becomeFirstResponder];
}

}

-- The second example returns the following warning: 'TestApplicationAppDelegate' may not respond to '-becomeFirstResponder'