自定义 UINavigationItem 上的标题未显示

发布于 2024-12-12 10:05:53 字数 904 浏览 2 评论 0原文

我正在使用自定义背景图像和标题创建自定义 UINavigationItem。显示了图像，但没有显示标题。可能出什么问题了？我这样做：

UIButton *button =  [UIButton buttonWithType:UIButtonTypeCustom]; 
[button setImage:[UIImage imageNamed:@"bar_button.png"] forState:UIControlStateNormal]; 
[button setBackgroundImage:[UIImage imageNamed:@"bar_button_black.png"] forState:UIControlStateSelected];
[button setBackgroundImage:[UIImage imageNamed:@"bar_button_black.png"] forState:UIControlStateHighlighted];
[button setTitle:@"Cancel" forState:UIControlStateNormal];
[button setTitle:@"Cancel" forState:UIControlStateSelected];
[button setTitle:@"Cancel" forState:UIControlStateHighlighted];
[button addTarget:self action:@selector(closeButtonClicked) forControlEvents:UIControlEventTouchUpInside]; 

[button setFrame:CGRectMake(0, 0, 49, 30)]; 
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];

原文

I'm creating custom UINavigationItem with custom background image and title. The image is shown but the title doesn't. What could be wrong?
I'm doing it this way:

UIButton *button =  [UIButton buttonWithType:UIButtonTypeCustom]; 
[button setImage:[UIImage imageNamed:@"bar_button.png"] forState:UIControlStateNormal]; 
[button setBackgroundImage:[UIImage imageNamed:@"bar_button_black.png"] forState:UIControlStateSelected];
[button setBackgroundImage:[UIImage imageNamed:@"bar_button_black.png"] forState:UIControlStateHighlighted];
[button setTitle:@"Cancel" forState:UIControlStateNormal];
[button setTitle:@"Cancel" forState:UIControlStateSelected];
[button setTitle:@"Cancel" forState:UIControlStateHighlighted];
[button addTarget:self action:@selector(closeButtonClicked) forControlEvents:UIControlEventTouchUpInside]; 

[button setFrame:CGRectMake(0, 0, 49, 30)]; 
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];

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慕烟庭风 2024-12-19 10:05:53

您需要将图像设置为backgroundImage，而不是直接设置。如果你这样设置图像，

[button setImage:[UIImage imageNamed:@"bar_button.png"] forState:UIControlStateNormal];

标题将不会显示

这样设置

[button setBackgroundImage:[UIImage imageNamed:@"bar_button.png"] forState:UIControlStateNormal];

You need to set image as backgroundImage not direct. If you set image like this

[button setImage:[UIImage imageNamed:@"bar_button.png"] forState:UIControlStateNormal];

the title will not be displayed

set like this

[button setBackgroundImage:[UIImage imageNamed:@"bar_button.png"] forState:UIControlStateNormal];

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仙女 2024-12-19 10:05:53

我认为你必须删除：

[button setImage:[UIImage imageNamed:@"bar_button.png"] forState:UIControlStateNormal];

之后，标题就会出现

I think you must remove:

[button setImage:[UIImage imageNamed:@"bar_button.png"] forState:UIControlStateNormal];

After that, the title will appear

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年华零落成诗 2024-12-19 10:05:53

删除此行

[button setImage:[UIImage imageNamed:@"bar_button.png"] forState:UIControlStateNormal];

或者您可以将标题颜色更改为其他颜色。我希望它能解决您的问题。

将其设置为 DrakgrayColor 或其他可以克服图像颜色的颜色。

Either remove this line

[button setImage:[UIImage imageNamed:@"bar_button.png"] forState:UIControlStateNormal];

or you can change the Title color to some other color.i hope it will solve your problem.

make it to DrakgrayColor or some other color which can overcome your image color.

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你げ笑在眉眼 2024-12-19 10:05:53

好的。找到了解决方法，但我不确定是否允许：

UIBarButtonItem *closeButton = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Close",@"Close") style:UIBarButtonItemStylePlain target:self action:@selector(closeButtonClicked)];
[self.navigationItem setLeftBarButtonItem:closeButton];

for (UIView *view in self.navigationController.navigationBar.subviews) {        
    if ([[[view class] description] isEqualToString:@"UINavigationButton"]) {
        UINavigationButton *button = {(UINavigationButton *)view};
        [button setBackgroundImage:[UIImage imageNamed:@"bar_button.png"] forState:UIControlStateNormal];
        [button setBackgroundImage:[UIImage imageNamed:@"bar_button_black.png"] forState:UIControlStateSelected];
        [button setBackgroundImage:[UIImage imageNamed:@"bar_button_black.png"] forState:UIControlStateHighlighted];

    }
}

OK. Found a workaround, however I'm not sure whether it is allowed:

UIBarButtonItem *closeButton = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Close",@"Close") style:UIBarButtonItemStylePlain target:self action:@selector(closeButtonClicked)];
[self.navigationItem setLeftBarButtonItem:closeButton];

for (UIView *view in self.navigationController.navigationBar.subviews) {        
    if ([[[view class] description] isEqualToString:@"UINavigationButton"]) {
        UINavigationButton *button = {(UINavigationButton *)view};
        [button setBackgroundImage:[UIImage imageNamed:@"bar_button.png"] forState:UIControlStateNormal];
        [button setBackgroundImage:[UIImage imageNamed:@"bar_button_black.png"] forState:UIControlStateSelected];
        [button setBackgroundImage:[UIImage imageNamed:@"bar_button_black.png"] forState:UIControlStateHighlighted];

    }
}

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