Question

我尝试以编程方式添加UINavigationBar并设置条形按钮项。我试过了：

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，只显示左边的按钮，右边的一个是隐藏的。我错过了什么吗？

Answer 1

声明

@property (nonatomic, strong) UINavigationItem *navItem;

在此类的.h文件中，您已编写了所有这些内容，然后使用以下代码替换您的代码。

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]

并确保导航栏非原子且强大。

右栏按钮不会出现

1 个答案: