关于将自定义图片加入uinavigation

UIButton *ButtonS = [UIButton buttonWithType:UIButtonTypeCustom];

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

    [ButtonS setBackgroundImage:[UIImage imageNamed:@"share_@2x.png"] forState:UIControlStateNormal];

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

    

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

    self.navigationItem.rightBarButtonItem = newBackButton;

    [newBackButton release];