ios - 从 UIButton 获取对 UIBarButtonItem 的引用？

Question

我创建了一个基于UIButton 的UIBarButtonItem。如何在事件处理程序中获取 UIBarButtonItem (!!!) 的引用？

UIButton *brigthnessButton = [[UIButton alloc]
                                        initWithFrame:CGRectMake(0, 0, 32, 32)];
[brigthnessButton setImage:newImage forState:UIControlStateNormal];
 forState:UIControlStateSelected];
[brigthnessButton addTarget:self action:@selector(createShortcut:)
                  forControlEvents:UIControlEventTouchUpInside];
shortCut = [[UIBarButtonItem alloc] initWithCustomView:brigthnessButton];

- (void)createShortcut:(UIButton *)button {
    UIBarButtonItem *b = ??? 
}

Answer 1

针对您的情况

shortCut = [[UIBarButtonItem alloc] initWithCustomView:brigthnessButton];
        [self.navigationItem setLeftBarButtonItem:shortCut];//if Left button

- (void)createShortcut:(UIButton *)button {

    UIBarbuttonItem *b = self.navigationItem.leftBarButtonItem;
}