Transparent UIView like photo gallery app in iphone

The default camera app has a photo gallery which has glossy and transparent look, especially the toolbar. One can see the image partially behind开发者_C百科 the toolbar. How is this achieved? Is it just by altering the opaque property of UIView? Any pointers are much appreciated.

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Just change the style of the status bar and the navigation bar.

-(void)viewWillAppear:(BOOL)animated_
{
   [super viewWillAppear:animated_];
   [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackTranslucent];
   [[[self navigationController] navigationBar] setBarStyle:UIBarStyleBlackTranslucent];
   [self setWantsFullScreenLayout:YES];
}

-(void)viewWillDisappear:(BOOL)animated_
{
   [super viewWillDisappear:animated_];
   [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackOpaque];
   [[[self navigationController] navigationBar] setBarStyle:UIBarStyleDefault];
}