iOS Navigation自定义设置Item

1. 自定义NavigationController:

@interface CustomNavigationController : UINavigationController

2. 重写Push方法, 拦截Push进来的控制器:

- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
     // 判断Push进来的控制器是否根控制器
     if (self.childViewControllers.count > 0)
     {
          // Push时隐藏TabBarBottom(应用层级结构为TabBarController -> NavigationController时)
          viewController.hidesBottomBarWhenPushed = YES;
       
          // 添加左边Item到navigationItem
          viewController.navigationItem.leftBarButtonItem = [UIBarButtonItem itemWithTarget:self image:@“leftBarButtonImage" highlightedImage:@"leftBarButtonImage_highlighted" action:@selector(clickLeftItem)];             

          // 添加左边Item到navigationItem
          viewController.navigationItem.rightBarButtonItem = [UIBarButtonItem itemWithTarget:self image:@“rightBarButtonImage" highlightedImage:@“rightBarButtonImage_highlighted" action:@selector(clickRightItem)];             
     }
   
     [super pushViewController:viewController animated:YES];  
}

Item点击事件:

- (void)clickLeftItem
{
     // Method
     [self popViewControllerAnimated:YES];
}

- (void)clickLeftItem
{
     // Method
}

3. 通过Category，自定义BarButtonItem创建方法:

+ (UIBarButtonItem *)itemWithTarget:(id)target image:(NSString *)imageName highlightedImage:(NSString *)highlightedImageName action:(SEL)action
{
    // 创建按钮
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    // 设置按钮图片
    [button setImage:[UIImage imageNamed:imageName] forState:UIControlStateNormal];
    [button setImage:[UIImage imageNamed:highlightedImageName] forState:UIControlStateHighlighted];
    // 设置按钮尺寸
    button.size = button.currentImage.size; // 避免图片拉伸
    // 设置按钮监听事件
    [button addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
   
    // 返回Item
    return [[UIBarButtonItem alloc] initWithCustomView:button];
}