导航栏背景没有改变

发布于 2024-10-06 04:40:19 字数 245 浏览 3 评论 0原文

我有一个导航栏，我想使用图像更改它，我正在实现此代码

self.navBar.layer.contents = (id)[UIImage imageNamed:@"flower.png"].CGImage;

，但背景仍然没有改变。导航栏的层次结构是： - UI导航栏 - UI导航项 - UISegementControl

我已经在该层次结构中的每个部分设置了一个出口。有什么问题吗？？？

原文

i have a navigation bar, i want to change it using image, i was implement this code

self.navBar.layer.contents = (id)[UIImage imageNamed:@"flower.png"].CGImage;

but the background is still didn't change. the hierarchy of navigation bar are :
- UINavigationBar
- UINavigationItem
- UISegementControl

i already set an outlet in every part in that hierarchy..
is there something wrong???

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め可乐爱微笑 2024-10-13 04:40:19

这是我非常成功地使用的：

CALayer *backgroundImageLayer;
backgroundImageLayer = [CALayer layer];
backgroundImageLayer.frame = CGRectMake(0, 0, 300, 44);
backgroundImageLayer.backgroundColor = [UIColor redColor].CGColor;
backgroundImageLayer.contents = (id)[[UIImage imageNamed:@"barImage.png"] CGImage];
backgroundImageLayer.zPosition = -5.0;
[myNavigationConroller.navigationBar.layer addSublayer:test];

关键是将 zPosition 设置为 -5.0，尽管任何负值都应该有效。它导致backgroundImageLayer不干扰UINavigationBar的按钮和标签。

Here's what I've used quite succesfully:

CALayer *backgroundImageLayer;
backgroundImageLayer = [CALayer layer];
backgroundImageLayer.frame = CGRectMake(0, 0, 300, 44);
backgroundImageLayer.backgroundColor = [UIColor redColor].CGColor;
backgroundImageLayer.contents = (id)[[UIImage imageNamed:@"barImage.png"] CGImage];
backgroundImageLayer.zPosition = -5.0;
[myNavigationConroller.navigationBar.layer addSublayer:test];

The key was setting the zPosition to -5.0, although any negative value should work. It causes the backgroundImageLayer not to interfere with UINavigationBar's buttons and label.

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