Question

我有一个带有NavigationController的故事板，它实现了我自己的NavigationViewController。

这是我在NavigationViewController中使用的设置代码：

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self setNavigationStyle];
}

- (void) setNavigationStyle
{
    self.navigationBar.backgroundColor = [[UIColor alloc]initWithRed:245 green:246 blue:247 alpha:1];
    self.navigationBar.hidden = NO;
    self.title = @"test";
    UIBarButtonItem *shareItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:nil];
    UIBarButtonItem *cameraItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:nil];

    NSArray *actionButtonItems = @[shareItem, cameraItem];
    self.navigationItem.rightBarButtonItems = actionButtonItems;
}

backgroundColor设置有效，导航控制器背景颜色也会更改。但是在尝试添加按钮或标题时，它不会影响导航栏。

我做错了什么？

更新：我已经实现了UiNavigtaionControlerDelegate：

- (void) setNavigationStyle: (UINavigationController *)navigationController
{
    navigationController.navigationBar.backgroundColor = [[UIColor alloc]initWithRed:245 green:246 blue:247 alpha:1];
    navigationController.navigationBar.hidden = NO;
    UIBarButtonItem *shareItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:nil];
    UIBarButtonItem *cameraItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:nil];

    NSArray *actionButtonItems = @[shareItem, cameraItem];
    navigationController.navigationItem.rightBarButtonItems = actionButtonItems;
}

- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    [self setNavigationStyle:navigationController];
}

仍然无效

Answer 1

根据类似问题的答案（Similar question）

虽然导航控制器有一个navigationItem，但实际上并非如此用过的。您应该重写导航控制器方法以推送视图控制器（或使用委托方法）来修改每个新视图控制器的navigationItem被推送。

实现UINavigationControllerDelegate和navigationController：willShowViewController：动画方法，然后更改navigationItem属性。

Answer 2

试试这个，创建导航栏和导航项目的插座，然后删除标题，按钮，颜色等。在IB

 - (void) setNavigationStyle
{
    self.navigationBar.backgroundColor = [[UIColor alloc]initWithRed:245 green:246 blue:247 alpha:1];
    self.navigationBar.hidden = NO;
    self.navigationItem.title = @"test";
    UIBarButtonItem *shareItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:nil];
    UIBarButtonItem *cameraItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:nil];

    NSArray *actionButtonItems = @[shareItem, cameraItem];
    self.navigationItem.rightBarButtonItems = actionButtonItems;
}

xcode自定义导航控制器不响应更改

2 个答案: