xcode 为什么 UIBarButtonItem 图像总是模糊/模糊/像素化
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Why is UIBarButtonItem image always fuzzy/blurry/pixelated
提问by Mate Hegedus
Here is my current code:
这是我当前的代码：
var reply = UIBarButtonItem(image: UIImage(named: "reply"), style: UIBarButtonItemStyle.Plain, target: self, action: Selector("reply:"))
self.navigationItem.rightBarButtonItem = reply
The button in the top right corner is always fuzzy. This is a screenshot from an iPhone4s device so it is not a retina-related issue.
右上角的按钮总是模糊的。这是 iPhone4s 设备的屏幕截图，因此它不是与视网膜相关的问题。
I have tried different image sizes ranging from 30x30 to 512x512 and adding the image using customView. These methods have not fixed the issue.
我尝试了从 30x30 到 512x512 的不同图像大小，并使用 customView 添加图像。这些方法都没有解决问题。
Thanks in advance.
提前致谢。
回答by Mate Hegedus
I have solved it using this method:
我已经使用这种方法解决了它：
var replyBtn = UIButton(frame: CGRect(x: 0, y: 0, width: 30, height: 30))
replyBtn.setImage(UIImage(named: "reply"), forState: UIControlState.Normal)
replyBtn.addTarget(self.navigationController, action: Selector("reply:"), forControlEvents: UIControlEvents.TouchUpInside)
var item = UIBarButtonItem(customView: replyBtn)
self.navigationItem.rightBarButtonItem = item
It displays a very crisp button using the exact same image.
它使用完全相同的图像显示一个非常清晰的按钮。
回答by LS_
From IOS human interface guide the icon should be 22x22 Take a look at the documentation here: https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/MobileHIG/BarIcons.html
从 IOS 人机界面指南中，图标应该是 22x22 看看这里的文档：https: //developer.apple.com/library/ios/documentation/UserExperience/Conceptual/MobileHIG/BarIcons.html
