如何复制后退按钮？

发布于 2024-11-05 07:19:10 字数 194 浏览 8 评论 0原文

我知道更改后退按钮文本颜色的唯一方法是制作自己的自定义按钮：

self.navigationItem.backBarButtonItem = yourCustomBackButton;

我的问题是：如何创建一个后退按钮，该按钮考虑色调颜色并且看起来与默认值完全相同后退按钮除了文本的颜色（除非它是白色的）？

原文

I understand that the only way to change the color of the text of the back button is to make your own custom button:

self.navigationItem.backBarButtonItem = yourCustomBackButton;

My question is: How do I create a back button that takes tint color into account and looks exactly the same as the default back button except for the color of the text (unless it's white)?

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要走就滚别墨迹 2024-11-12 07:19:10

将类别添加到 UINavigationBar 并在那里设置其背景颜色。此代码还展示了如何使用图像。

@implementation UINavigationBar (UINavigationBarCategory)
- (void)drawRect:(CGRect)rect {

/***
 // use a custom color
 UIColor *color = [UIColor colorWithRed:.455 green:.365 blue:0 alpha:.9];
 3    CGContextRef context = UIGraphicsGetCurrentContext();
 4    CGContextSetFillColor(context, CGColorGetComponents( [color CGColor]));
 5    CGContextFillRect(context, rect);
 6    self.tintColor = color;
 ***/

// use a custom background image
UIImage *img  = [UIImage imageNamed: [PlistVariables sharedInstance].navbarBackgroundImageName ];
[img drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
self.tintColor = [PlistVariables sharedInstance].navbarTintColor;
 }

以下是使用 RGB 192,93,0 作为背景棕色的一些示例输出：

在此处输入图像描述

Add a category to the UINavigationBar and set it's background color there. This code also shows how to use an image.

@implementation UINavigationBar (UINavigationBarCategory)
- (void)drawRect:(CGRect)rect {

/***
 // use a custom color
 UIColor *color = [UIColor colorWithRed:.455 green:.365 blue:0 alpha:.9];
 3    CGContextRef context = UIGraphicsGetCurrentContext();
 4    CGContextSetFillColor(context, CGColorGetComponents( [color CGColor]));
 5    CGContextFillRect(context, rect);
 6    self.tintColor = color;
 ***/

// use a custom background image
UIImage *img  = [UIImage imageNamed: [PlistVariables sharedInstance].navbarBackgroundImageName ];
[img drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
self.tintColor = [PlistVariables sharedInstance].navbarTintColor;
 }

Here's some sample output using RGB 192,93,0 for background brown:

enter image description here

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