ios - 右栏按钮不出现

Question

我尝试以编程方式添加 UINavigationBar 并设置栏按钮项目。 我试过:

self.artificialNavBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 44)];
    self.artificialNavBar.backgroundColor = [UIColor whiteColor];
    UIBarButtonItem *bbiDone = [[UIBarButtonItem alloc] initWithTitle:@"Готово" style:UIBarButtonItemStyleDone target:nil action:nil];
    UIBarButtonItem *bbiTry = [[UIBarButtonItem alloc] initWithTitle:@"Cancel" style:UIBarButtonItemStyleDone target:nil action:nil];
UINavigationItem *navItem = [[UINavigationItem alloc] init];

    navItem.leftBarButtonItem = bbiDone;
    navItem.rightBarButtonItem = bbiTry;

    self.artificialNavBar.items = @[ navItem ];
    [self.view addSubview:self.artificialNavBar];

但是，仅出现左侧栏按钮，右侧栏按钮被隐藏。我错过了什么吗？

Answer 1

声明

@property (nonatomic, strong) UINavigationItem *navItem;

在此类的 .h 文件中，您已经编写了所有这些内容，然后将您的代码替换为以下代码。

self.artificialNavBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 44)];
self.artificialNavBar.backgroundColor = [UIColor whiteColor];
[self.view addSubview:self.artificialNavBar];

UIBarButtonItem *bbiDone = [[UIBarButtonItem alloc] initWithTitle:@"Готово" style:UIBarButtonItemStyleDone target:nil action:nil];
UIBarButtonItem *bbiTry = [[UIBarButtonItem alloc] initWithTitle:@"Cancel" style:UIBarButtonItemStyleDone target:nil action:nil];

self.navItem = [[UINavigationItem alloc] init];
[self.navItem setLeftBarButtonItem:bbiDone animated:NO]
[self.navItem setRightBarButtonItem:bbiTry animated:NO]

[self.artificialNavBar setItems:@[self.navItem] animated:NO]

并确保导航栏是非原子的和强大的。