粘贴操作上的 UITextView stange 动画故障(iOS11) [英] UITextView stange animation glitch on paste action (iOS11)

问题描述

我正面临一个非常奇怪的错误.当我在 UITextView 中粘贴任何内容时，我收到了一个令人惊讶的动画故障.

为了重现它，我刚刚创建了一个黑色的 .xcodeproj，通过故事板将 UITextView 添加到 ViewController 并运行应用程序.>

我发现的唯一类似问题是 https://twitter.com/twostraws/status/972914692195790849它说这是iOS11中UIKit的一个错误.但是我的 iPhone 上有很多带有 UITextview 的应用程序可以在 iOS11 上正常运行.您可以在此处查看视频中的错误 – https://twitter.com/twostraws/status/972914692195790849

任何建议或帮助将不胜感激.我尝试了什么?- 以最少的更改尝试了新的清晰项目；- 禁用所有自动更正类型；- 删除了限制；- 在多款不同版本的 iPhone 上尝试过 – 11.2.5 和 11.4.2.

附上原项目.它是在 Swift 4.1 和 Xcode 9.4(9F1027a) 上制作的https://ufile.io/fzyj8

解决方案

我在我的 iPhone 上检查了一些其他应用程序，比如 Todoist 并在那里发现了同样的错误.但我也找到了解决方案.我希望 Apple 会尽快修复这个错误.

所以你可以实现 UITextPasteDelegate 并禁用粘贴动作的动画.这个API只有iOS11+才有，不过貌似这个bug也只在iOS11上重现.

class ViewController: UIViewController {@IBOutlet 弱变量 textView:UITextView！覆盖 func viewDidLoad() {super.viewDidLoad()textView.pasteDelegate = self}}扩展视图控制器:UITextPasteDelegate {func textPasteConfigurationSupporting(_ textPasteConfigurationSupporting: UITextPasteConfigurationSupporting, shouldAnimatePasteOf attributesString: NSAttributedString, to textRange: UITextRange) ->布尔{返回假}}

I'm facing a very strange bug. When I paste anything inside UITextView, I receive a surprising glitch of animation.

To reproduce it I've just created a black .xcodeproj, added UITextView to ViewController via storyboard and ran the application.

The only similiar problem I've found is https://twitter.com/twostraws/status/972914692195790849 And it says that it's a bug of UIKit in iOS11. But there lot of applications on my iPhone with UITextview that works correctly on iOS11. You can see the bug in the video here – https://twitter.com/twostraws/status/972914692195790849

Any suggestions or help would be appreciated. What I tried? - Tried the new clear project with minimal changes; - Disabled all the autocorrection types; - Removed constraints; - Tried on several iPhones with different version – 11.2.5 and 11.4.2.

The original project is attached. It's made on Swift 4.1 with Xcode 9.4(9F1027a) https://ufile.io/fzyj8

解决方案

I checked some other applications on my iPhone like Todoist and found the same bug there. But also I've found the solution. I hope Apple will urgently fix this bug.

So you may implement the UITextPasteDelegate and disabled the animation on paste action. This API is available only iOS11+, but it seems that the bug is also reproduced only on iOS11.

class ViewController: UIViewController {

    @IBOutlet weak var textView: UITextView!

    override func viewDidLoad() {
        super.viewDidLoad()
        textView.pasteDelegate = self
    }
}

extension ViewController: UITextPasteDelegate {
    func textPasteConfigurationSupporting(_ textPasteConfigurationSupporting: UITextPasteConfigurationSupporting, shouldAnimatePasteOf attributedString: NSAttributedString, to textRange: UITextRange) -> Bool {
        return false
    }
}

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