- (void) viewDidAppear:(BOOL)animated{
UIView *view=(UIView *)[[AppDelegate appDelegate].window viewWithTag:800];
[view removeFromSuperview];
UIImageView *bgImage = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0,320,480)];
bgImage.tag = 800;
[bgImage setImage:[UIImage imageNamed:@"testSubject.png"]];
[bgImage setAlpha:0.4];
[[AppDelegate appDelegate].window addSubview:bgImage];
}