关于将自定义图片加入uinavigation

UIButton *ButtonS = [UIButtonbuttonWithType:UIButtonTypeCustom];

    ButtonS.frame =CGRectMake(0,0 ,36, 29);

    [ButtonS setBackgroundImage:[UIImageimageNamed:@"[e-mail]"]forState:UIControlStateNormal];

    [ButtonS addTarget:selfaction:@selector(selectRightBarbutton)forControlEvents:UIControlEventTouchUpInside];

    

    UIBarButtonItem *newBackButton = [[UIBarButtonItemalloc] initWithCustomView:ButtonS];

    self.navigationItem.rightBarButtonItem = newBackButton;

    [newBackButton release];