Question

它适用于没有标签栏但没有标签栏的ViewController。此外，这是故事板中的第一个视图控制器。

UIImage *bookmarkImage = [UIImage imageNamed:@"bookmark"];

//create the button and assign the image
UIButton *bookmarkButton = [UIButton buttonWithType:UIButtonTypeCustom];

 //set the frame of the button to the size of the image (see note below)
bookmarkButton.frame = CGRectMake(100, 0, bookmarkImage.size.width,      bookmarkImage.size.height);
        [bookmarkButton setImage:bookmarkImage forState:UIControlStateNormal];

bookmarkButton addTarget:self action:@selector(addFavorite:) forControlEvents:UIControlEventTouchUpInside];
bookmarkButton.imageView.contentMode=UIViewContentModeScaleAspectFit;

//create a UIBarButtonItem with the button as a custom view
UIBarButtonItem *customBarItem2 = [[UIBarButtonItem alloc] initWithCustomView:bookmarkButton];
self.navigationItem.rightBarButtonItem = customBarItem2;

Answer 1

我在理解你的问题时遇到了一些问题，但是从我可以收集的情况来看，似乎你试图添加按钮的课程并不是UINavigationController。

我不确定你如何实例化这个类（ClassX），但应该这样做：

ClassX *temp = [[ClassX alloc] init....];

UINavigationController *control = [[UINavigationController alloc] initWithRootViewController:temp];

然后显示控件视图。

Answer 2

第一印象，我认为问题是由UIButton *bookmarkButton = [UIButton buttonWithType:UIButtonTypeCustom];造成的，但我不太确定。如果你愿意，你可以像这样修改。它确实有用。

- (void)viewDidLoad
{
    [super viewDidLoad];
    navigationBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
    UINavigationItem *navigationItem = [[[UINavigationItem alloc] initWithTitle:@"My NavigationBar"] autorelease];

    UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(100, 0, 70, 30)];

    [button setImage:[UIImage imageNamed:@"bookmark.png"] forState:UIControlStateNormal];
    [button addTarget:self action:@selector(buttonClicked)
     forControlEvents:UIControlEventTouchUpInside];

    UIBarButtonItem *buttonItem = [[UIBarButtonItem alloc]
                                   initWithCustomView:button];

    navigationItem.rightBarButtonItem = buttonItem;
    [navigationBar pushNavigationItem:navigationItem animated:NO];
    [self.view addSubview:navigationBar];

    [buttonItem release];
    [button release];
}

IOS添加右键导航栏不起作用

2 个答案: