xcode UITabBar 完全透明
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UITabBar fully transparent
提问by Matthijn
In XCode I am using the interface builder (StoryBoard) to lay out most of my layout. However I want some custom drawing on this. This works quite well.
在 XCode 中，我使用界面构建器 (StoryBoard) 来布置我的大部分布局。但是我想要一些自定义绘图。这很有效。
There is however a problem what I am facing. I have a "bite" out of the active tab. (see http://cl.ly/Efno) I want this bite fully transparent. (I have set an pink background color to see what part I want transparent which is not transparent.)
然而，我面临着一个问题。我从活动标签中“咬了一口”。（见http://cl.ly/Efno）我想要这口完全透明。（我已经设置了一个粉红色的背景颜色，看看我想要透明的部分是不透明的。）
How I have changed the look and feel is the following.
我如何改变外观和感觉如下。
- Set the UITabBar class to my own class in the interface builder for the corresponding tabbar.
In the awakeFromNib of that class I have set the label position and image and selected image of each tabbar item. Like so
[tabBarItem setFinishedSelectedImage:selectedImage withFinishedUnselectedImage:image];
- 在相应标签栏的界面构建器中将 UITabBar 类设置为我自己的类。
在该类的awakeFromNib 中，我设置了每个标签栏项目的标签位置和图像以及选定的图像。像这样
[tabBarItem setFinishedSelectedImage:selectedImage withFinishedUnselectedImage:image];
Each image fully covers the entire tabbar in height and has the width of the tab item itself.
每个图像在高度上完全覆盖整个标签栏，并具有标签项本身的宽度。
- Set the background image of the tabbar to none (a fully transparent image)
- Set the background color of the tabbar to a fully transparent color (now I have a pink color set to see where it goes wrong)
- In the interface builder uncheck "opaque" for the tabbar.
- 将标签栏的背景图像设置为无（完全透明的图像）
- 将标签栏的背景颜色设置为完全透明的颜色（现在我设置了粉红色以查看哪里出错了）
- 在界面构建器中，取消选中标签栏的“不透明”。
However, it is not transparent, the pink part is black. How can I make this transparent?
但是，它不是透明的，粉红色的部分是黑色的。我怎样才能使这个透明？
Thanks
谢谢
采纳答案by Wilmar
Have a look at the appearance proxy for UITabBar, you might be able to do what you want there without having to use a custom subclass. There are tons of properties you can access and change. You could set the relevant properties in the app delegate. It is iOS5 only though, but I gather that you are using that already, since you mentioned storyboards.
看看 UITabBar 的外观代理，您也许可以在那里做您想做的事，而不必使用自定义子类。您可以访问和更改大量属性。您可以在应用程序委托中设置相关属性。虽然它只是 iOS5，但我认为你已经在使用它了，因为你提到了故事板。
E.g.
例如
UIImage *tabBarBackground = [UIImage imageNamed:@"tabBarBackground.png"];
[[UITabBar appearance] setBackgroundImage:tabBarBackground];
[[UITabBar appearance] setSelectedImageTintColor:[UIColor colorWithRed:127.0/255.0 green:186.0/255.0 blue:235.0/255.0 alpha:1.0]];
[[UITabBar appearance] setSelectionIndicatorImage:[UIImage imageNamed:@"tabBarItemSelected.png"]];
