UIBarButtonItem 自定义 RightBarButtonItem

- (void)setRightBarButtonItemImage:(UIImage *)image sel:(SEL)sel

{

    UIButton *button = [[UIButtonalloc] initWithFrame:CGRectMake(0,0, image.size.width/2, image.size.height/2)];

    [button setImage:imageforState:UIControlStateNormal];

    [button addTarget:selfaction:sel forControlEvents:UIControlEventTouchUpInside];

    UIBarButtonItem *item = [[UIBarButtonItemalloc] initWithCustomView:button];

    self.navigationItem.rightBarButtonItem = item;

}