Question

我需要将导航控制器中后退按钮的默认标题值更改为其他内容。

我正在尝试使用以下代码：

UIBarButtonItem *newBackButton = [[UIBarButtonItem alloc] initWithTitle: @"Terug" style:    UIBarButtonItemStyleBordered target:nil action:nil];
self.navigationItem.backBarButtonItem = newBackButton;
[newBackButton release];

我也试过了：

UIBarButtonItem *newBackButton = [[UIBarButtonItem alloc] initWithTitle: @"Terug" style:    UIBarButtonItemStylePlain target:nil action:nil];
self.navigationItem.backBarButtonItem = newBackButton;
[newBackButton release];

我在viewDidLoad的末尾使用此代码。

我可以使用以下代码创建一个普通按钮（方形）：

UIBarButtonItem *newBackButton = [[UIBarButtonItem alloc] initWithTitle: @"Terug" style:    UIBarButtonItemStyleBordered target:nil action:nil];
self.navigationItem.leftBarButtonItem = newBackButton;
[newBackButton release];

这个解决方案的问题是我需要创建一个弹出视图控制器的单独方法。另一个问题是按钮的形状，我需要一个箭头形按钮。

你知道吗？

Answer 1

如果您想要一个自定义后退按钮，您需要创建一个新按钮并为其指定一个新的选择器。 backBarButtonItem不可编辑，因此您需要设置leftBarButtonItem。

这是您创建自定义后退按钮的方法

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setTitle:NSLocalizedString(@"Back", nil) forState:UIControlStateNormal];
[button setBackgroundImage:[UIImage imageNamed:@"back.png"] forState:UIControlStateNormal];

[button addTarget:navigationController action:@selector(backAction:)forControlEvents:UIControlEventTouchUpInside];

UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithCustomView:button];
navigationController.navigationItem.leftBarButtonItem = backButton;
[backButton release];

这是模拟后退按钮的选择器

- (IBAction)backAction:(id)sender
{
    [self.navigationController popViewControllerAnimated:YES];
}

Answer 2

有一个简单的解决方案

假设您正在从viewA移动到viewB 在从viewA移动到viewB之前，更改viewA的标题

例如：

-(void)moveToViewB
{

    // Add this line
    self.title = @"Terug"; 
    // and push the new view as normal 
    [self.navigationController pushViewController:viewB animated:NO];
}

Answer 3

从您的＆＃39; viewDidLoad＆＃39;中调用此按钮方法

- (void)addCustomBackButton {

    /*  enter your image name and size here  */
    UIImage  *backImage = [UIImage imageNamed:@"back_btn.png"];
    CGRect buttonRect = CGRectMake(5.0f, 0.0f, 12.0f, 20.0f);
    /*  enter your image name and size here  */

    UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [backButton addTarget:self action:@selector(backAction) forControlEvents:UIControlEventTouchUpInside];  // implemeent 'backAction' method in each VC
    [backButton setFrame:buttonRect];

    UIImageView *imageView = [[UIImageView alloc] initWithImage:backImage];
    [imageView setFrame:buttonRect];
    [backButton addSubview:imageView];

    UIBarButtonItem *homeButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
    self.navigationItem.leftBarButtonItem = homeButtonItem;
}

[或者，让它成为一个＆＃39; Utitlity＆＃39; class并在每个viewContorller中将其称为类方法。它是必需的。]

另外，不要忘记实施＆＃39; backAction＆＃39;，如下所示：

- (void)backAction
{
    [self.navigationController popViewControllerAnimated:YES];
}

快乐的编码！

更改后退按钮的标题

3 个答案: