how to get application frame

gistfile1.txt

- (IBAction)loadDataButtonClicked:(id)sender {
    if (_scaledDown) {
        [self _beginReleaseAnimation];
    }
    [_delegate draggableViewTouched:self];
    self.hideBtn.hidden = YES;
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    if (_scaledDown) {
        [self _beginReleaseAnimation];
    }
    if (!_moved) {
        [_delegate draggableViewTouched:self];
        UIButton *hideBtn = [UIButton buttonWithType:UIButtonTypeCustom];
        
        //there is destination code
        hideBtn.frame = [self.window.screen applicationFrame];
        
        hideBtn.titleLabel.textColor = [UIColor clearColor];
        self.hideBtn = hideBtn;
        self.hideBtn.hidden = NO;
        [self.hideBtn addTarget:self action:@selector(loadDataButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
        [self.window insertSubview:self.hideBtn aboveSubview:self];
//        [hideBtn release];
    } else {
        [_delegate draggableViewReleased:self];
    }
    
    _moved = NO;
}