Question

在X条码中,当UIToolBar(例如Black Translucent)的《国际会计和报告准则》确定“国际会计和报告准则”时,UITool BarItem与它的背景图像相匹配。 UITool BarItem如何知道应当使用什么样的风格?

我试图在经常的背景功能(按部就地将某个特定形象与背景形象混为一谈)。我想该法典要足够笼统,以便它能够处理所有商品清单。这就是说,我想知道UITool BarItem何时决定使用和拦截它的背景,这样我就可以在飞机上形成纽芬兰的形象。

Answer 1

Without being able to see apple s implementation of UIBarbuttonItem, I posit that they do not, in fact, know what the style of their UIToolbar is. If you look closely, they have the same alpha as their toolbar, and the same overlay (indicative of a subview). Therefore, any image that is below this highlighted layer, added as a subview, should conform to the UIToolbar s style. If you want to use multiple images though (one for each barStyle), you can determine it with self.myToolbar.barStyle and plan appropriately at -viewDidLoad time. As for true image drawing, subclass UIToolbar and override -drawRect: and use [UIImage drawInRect:rect];

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