Transparent UIToolBar

最新推荐文章于 2025-08-04 15:58:52 发布

转载最新推荐文章于 2025-08-04 15:58:52 发布 · 864 阅读

文章标签：

#properties #interface #iphone

Iphone&Mac 专栏收录该内容

79 篇文章

订阅专栏

本文介绍了如何在iOS应用中实现透明的UI工具栏，并通过自定义子类的方法解决背景覆盖问题，适用于需要在黑色不透明导航栏上使用工具栏的情况。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

Sometimes it is really necessary to have a transparent UIToolBar within you iPhone app. Especially if you want to add a UIToolBar to your UINavigationBar you get some problems with overlaying backgrounds (UIBarStyleBlackOpaque did not work for a toolbar on a black opaque navigation bar).

A quick and pragmatic solution is to subclass UIToolBar and do some modifications. The following code is everything you need to get a really transparent tool bar:

@interface TransparentToolbar : UIToolbar
@end
 
@implementation TransparentToolbar
 
// Override draw rect to avoid
// background coloring
- (void)drawRect:(CGRect)rect {
    // do nothing in here
}
 
// Set properties to make background
// translucent.
- (void) applyTranslucentBackground
{
	self.backgroundColor = [UIColor clearColor];
	self.opaque = NO;
	self.translucent = YES;
}
 
// Override init.
- (id) init
{
	self = [super init];
	[self applyTranslucentBackground];
	return self;
}
 
// Override initWithFrame.
- (id) initWithFrame:(CGRect) frame
{
	self = [super initWithFrame:frame];
	[self applyTranslucentBackground];
	return self;
}
 
@end

To apply a color to the including UIBarButtonItems you can set the bar style as usual.

That’s all for today,
Andreas