自定义UIBarButtonItem“完成”风格和“平原”风格分别使用UIAppearance [英] Customizing UIBarButtonItem "Done" style and "Plain" style separately using UIAppearance

问题描述

我知道如何使用 -setBackgroundImage：forState：barMetrics：自定义 UIBarButtonItem ，但我想使用 UIBarButtonItemStyleDone 和 UIBarButtonItemStylePlain 的不同图片。

I know how to customize UIBarButtonItem using -setBackgroundImage: forState: barMetrics:, but I would like to use different images for UIBarButtonItemStyleDone and UIBarButtonItemStylePlain.

是否有使用 UIAppearance 协议实现此目的的方法？或者每次我想要一个完成样式按钮时我是否必须设置图像？

Is there a way to accomplish this using the UIAppearance protocol? Or do I have to set the image each time I want a "Done" style button?

（我试着搞乱如下代码：

(I tried messing around with code like the following:

[[UIBarButtonItem外观] setBackgroundImage：image forState：UIControlStateNormal barMetrics：UIBarButtonItemStyleDone];

但是只需用完成图像设置每个条形按钮。）

But that just sets every bar button with the "Done" image.)

谢谢！

推荐答案

在 iOS 6 中，您可以使用UIBarButtonItem类的新方法：

In iOS 6 you can use the new method of UIBarButtonItem class:

- (void)setBackgroundImage:(UIImage *)backgroundImage
                  forState:(UIControlState)state
                     style:(UIBarButtonItemStyle)style
                barMetrics:(UIBarMetrics)barMetrics

它设置指定状态，样式和指标的背景图像。
更多详细信息

It sets the background image for the specified state, style, and metrics. More details are available in the Apple docs

所以要更改所有可以使用的UIBarButtonItem的外观类似于：

So to change the appearance of all UIBarButtonItems you can use something like:

UIImage *doneBackgroundImage = [[UIImage imageNamed:@"button_done.png"]
   resizableImageWithCapInsets:UIEdgeInsetsMake(0, 4, 0, 4)];

[[UIBarButtonItem appearance] setBackgroundImage:doneBackgroundImage
                                            forState:UIControlStateNormal
                                               style:UIBarButtonItemStyleDone
                                          barMetrics:UIBarMetricsDefault];

这篇关于自定义UIBarButtonItem“完成”风格和“平原”风格分别使用UIAppearance的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！