如何隐藏默认导航栏按钮并在其中添加自定义按钮？

发布于 2024-10-23 13:42:42 字数 1068 浏览 1 评论 0原文

我有一个基于导航的应用程序，我想在其中隐藏默认导航它显示在左侧，我想添加自己的自定义按钮。我编写了以下 2 段代码。

代码示例 1：

- (void)viewDidLoad {
    appDelegate=[(FoodAppDelegate *)[UIApplication sharedApplication]delegate];
UIButton *button =  [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:[UIImage imageNamed:@"Volunteers_back.png"] forState:UIControlStateNormal];
[button addTarget:self action:@selector(back:) forControlEvents:UIControlEventTouchUpInside];
[button setFrame:CGRectMake(0, 0, 86, 30)];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];

但这会显示默认导航按钮。

第二个代码示例：

self.navigationItem.hidesBackButton=YES;
    UIBarButtonItem *barButton = [[UIBarButtonItem alloc] initWithTitle:@"DontWorryAboutThis" style:UIBarButtonItemStylePlain target:self action:@selector(back:)];
    [barButton setImage:[UIImage imageNamed:@"Volunteers_back.png"]];
    [self.navigationItem setLeftBarButtonItem:barButton];

此代码示例显示按钮默认值和自定义值彼此重叠。有谁知道这里有什么问题？或者有任何示例代码可以实现此目的吗？

原文

I have one navigation based application in which i want to hide the default navigation
which is display at left side and i want to add my own custom button.I have written following 2 code.

code sample 1:

- (void)viewDidLoad {
    appDelegate=[(FoodAppDelegate *)[UIApplication sharedApplication]delegate];
UIButton *button =  [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:[UIImage imageNamed:@"Volunteers_back.png"] forState:UIControlStateNormal];
[button addTarget:self action:@selector(back:) forControlEvents:UIControlEventTouchUpInside];
[button setFrame:CGRectMake(0, 0, 86, 30)];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];

But this displays default navigation button.

second code sample:

self.navigationItem.hidesBackButton=YES;
    UIBarButtonItem *barButton = [[UIBarButtonItem alloc] initWithTitle:@"DontWorryAboutThis" style:UIBarButtonItemStylePlain target:self action:@selector(back:)];
    [barButton setImage:[UIImage imageNamed:@"Volunteers_back.png"]];
    [self.navigationItem setLeftBarButtonItem:barButton];

This one displays both button default and custom overlapping each other.
Does anyone have any idea what is the problem here?or any sample code to achieve this?

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我很坚强 2024-10-30 13:42:42

您不应该隐藏后退按钮。如果替换 leftBarButtonItem，它应该覆盖那里的任何按钮。我使用这段代码，并且只有这段代码才能在我的几个应用程序中完成此任务。

UIBarButtonItem *btnCancel =
[[UIBarButtonItem alloc] initWithTitle: @"Cancel"
                                 style: UIBarButtonItemStylePlain
                                target: self
                                action: @selector(actionButtonCancel)];
self.navigationItem.leftBarButtonItem = btnCancel;
[btnCancel release];

You shouldn't have to hide the back button. If you replace the leftBarButtonItem, it should overwrite whatever button is there. I use this code, and ONLY this code to accomplish this in several of my apps.

UIBarButtonItem *btnCancel =
[[UIBarButtonItem alloc] initWithTitle: @"Cancel"
                                 style: UIBarButtonItemStylePlain
                                target: self
                                action: @selector(actionButtonCancel)];
self.navigationItem.leftBarButtonItem = btnCancel;
[btnCancel release];

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