从Xcode 11.1升级到Xcode 11.2后,我的应用崩溃了:

***由于未捕获异常'NSInvalidUnarchiveOperationException'而终止应用程序,原因:'无法实例化名为_UITextLayoutView的类,因为没有找到名为_UITextLayoutView的类;类需要在源代码中定义或从库中链接(确保类是正确目标的一部分)'

为什么会这样?我怎样才能防止这种崩溃?


当前回答

我使用了一个成功的变通方法,但很痛苦。以下是我遵循的流程:

在文本编辑器中打开XIB 找到违规的TextView。在我的例子中:

<textView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" textAlignment="natural" translatesAutoresizingMaskIntoConstraints="NO" id="782-j1-88c" customClass="LCAnsiConsoleTextView">
  <rect key="frame" x="16" y="20" width="343" height="589"/>
  <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
  <fontDescription key="fontDescription" name="Menlo-Regular" family="Menlo" pointSize="12"/>
  <textInputTraits key="textInputTraits" autocapitalizationType="sentences"/>
</textView>

注意它的id(在我的例子中:id="782-j1-88c") 如上面的答案所述,重写类并重新创建选项(我的是Objective-C,抱歉):

@implementation FixedTextView

- (id) initWithCoder:(NSCoder*)coder
{
    if ([[NSProcessInfo processInfo] isOperatingSystemAtLeastVersion:(NSOperatingSystemVersion){13,2,0}])
        self = [super initWithCoder:coder];
    else {
        self = [super initWithFrame:CGRectMake(16, 3, 343, 605)];
        self.editable = YES;
        self.selectable = YES;
        self.insetsLayoutMarginsFromSafeArea = YES;
        self.clipsToBounds = YES;
        self.clearsContextBeforeDrawing = YES;
        self.autoresizesSubviews = YES;
        self.contentMode = UIViewContentModeScaleToFill;
        self.scrollEnabled = YES;
        self.userInteractionEnabled = YES;
        self.multipleTouchEnabled = YES;
        self.translatesAutoresizingMaskIntoConstraints = NO;
        self.font = [UIFont fontWithName:@"Menlo-Regular" size:12.0];
    }
    return self;
}

注意包含文本视图id的约束,并根据视图或视图控制器中的其他元素id重新创建这些约束。在我的例子中:

- (id) initWithCoder:(NSCoder *)aDecoder
{
    self = [super initWithCoder:aDecoder];
    if (self) {
        [self xibSetup];
        [self initView];
/*
        <constraint firstItem="75C-lt-YtE" firstAttribute="top" secondItem="782-j1-88c" secondAttribute="bottom" constant="8" symbolic="YES" id="8SH-5l-FAs"/>
        <constraint firstItem="782-j1-88c" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leadingMargin" id="Mve-aZ-HCe"/>
        <constraint firstItem="782-j1-88c" firstAttribute="leading" secondItem="75C-lt-YtE" secondAttribute="leading" id="dPG-u3-cCi"/>
        <constraint firstItem="782-j1-88c" firstAttribute="trailing" secondItem="iN0-l3-epB" secondAttribute="trailingMargin" id="sjT-0Q-hNj"/>
        <constraint firstItem="782-j1-88c" firstAttribute="top" secondItem="vUN-kp-3ea" secondAttribute="top" id="vic-vZ-osR"/>
*/
        [self.command.topAnchor constraintEqualToAnchor:self.console.bottomAnchor constant:8].active = YES;
        [self.console.leadingAnchor constraintEqualToAnchor:self.layoutMarginsGuide.leadingAnchor].active = YES;
        [self.console.leadingAnchor constraintEqualToAnchor:self.command.leadingAnchor].active = YES;
        [self.console.trailingAnchor constraintEqualToAnchor:self.trailingAnchor].active = YES;
        [self.console.topAnchor constraintEqualToAnchor:self.safeAreaLayoutGuide.topAnchor].active = YES;

    }
    return self;
}

这样做解决了我的问题,而没有损失所需的功能。幸运的是,我只有一个UITextView要替换。否则,这就站不住脚了。

其他回答

我已经将khan的Obj-C解决方案改编为Swift:

import UIKit

@objc
class UITextViewWorkaround : NSObject {

    static func executeWorkaround() {
        if #available(iOS 13.2, *) {
        } else {
            let className = "_UITextLayoutView"
            let theClass = objc_getClass(className)
            if theClass == nil {
                let classPair: AnyClass? = objc_allocateClassPair(UIView.self, className, 0)
                objc_registerClassPair(classPair!)
            }
        }
    }

}

在AppDelegate中的didFinishLaunchingWithOptions末尾调用它。

谢谢@Aftab !

一个更快的解决方法:

///Substitute class for _UITextLayoutView bug
class FixedTextView: UITextView {
    required init?(coder: NSCoder) {
        if #available(iOS 13.2, *) {
            super.init(coder: coder)
        }
        else {
            let rect = CGRect(origin: .zero, size: CGSize(width: 100, height: 44*3))
            super.init(frame: rect, textContainer: nil)
        }
    }
}

将此代码添加到某个地方,然后将所有故事板实例替换为FixedTextView。

注意:你将失去在故事板中创建的所有属性。这可能会产生严重的影响(例如委托设置、大小等)。

我也有同样的问题,我只是把我的Xcode 11.2升级到11.2.1,它工作得很好。

升级后,我在iOs 13和iOs 12上测试了同样的功能,效果很好。

该问题已在Xcode 11.2.1中修复。

编辑:由于修复现在已经发布,你应该切换到Xcode版本并注释掉这个解决方案。Mojtaba Hosseini在他的答复中提到:

... 这最后两个灵活的变通方法使用了苹果私有API,将被苹果审查拒绝!

在苹果发布修复之前,这是一个继续开发和测试的好办法。


对于Xcode 11.2,基于Aftab Muhammed Khan的想法,在John Nimis的帮助下,我测试了以下代码。

无需更改故事板文件!

编辑我的AppDelegate.swift文件并添加了这个类

//******************************************************************
// MARK: - Workaround for the Xcode 11.2 bug
//******************************************************************
class UITextViewWorkaround: NSObject {

    // --------------------------------------------------------------------
    // MARK: Singleton
    // --------------------------------------------------------------------
    // make it a singleton
    static let unique = UITextViewWorkaround()

    // --------------------------------------------------------------------
    // MARK: executeWorkaround()
    // --------------------------------------------------------------------
    func executeWorkaround() {

        if #available(iOS 13.2, *) {

            NSLog("UITextViewWorkaround.unique.executeWorkaround(): we are on iOS 13.2+ no need for a workaround")

        } else {

            // name of the missing class stub
            let className = "_UITextLayoutView"

            // try to get the class
            var cls = objc_getClass(className)

            // check if class is available
            if cls == nil {

                // it's not available, so create a replacement and register it
                cls = objc_allocateClassPair(UIView.self, className, 0)
                objc_registerClassPair(cls as! AnyClass)

                #if DEBUG
                NSLog("UITextViewWorkaround.unique.executeWorkaround(): added \(className) dynamically")
               #endif
           }
        }
    }
}

并在委托中调用“didFinishLaunchingWithOptions”调用解决方案

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

    // Override point for customization after application launch.

    // This is the workaround for Xcode 11.2
    UITextViewWorkaround.unique.executeWorkaround()
}

我使用了一个成功的变通方法,但很痛苦。以下是我遵循的流程:

在文本编辑器中打开XIB 找到违规的TextView。在我的例子中:

<textView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" textAlignment="natural" translatesAutoresizingMaskIntoConstraints="NO" id="782-j1-88c" customClass="LCAnsiConsoleTextView">
  <rect key="frame" x="16" y="20" width="343" height="589"/>
  <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
  <fontDescription key="fontDescription" name="Menlo-Regular" family="Menlo" pointSize="12"/>
  <textInputTraits key="textInputTraits" autocapitalizationType="sentences"/>
</textView>

注意它的id(在我的例子中:id="782-j1-88c") 如上面的答案所述,重写类并重新创建选项(我的是Objective-C,抱歉):

@implementation FixedTextView

- (id) initWithCoder:(NSCoder*)coder
{
    if ([[NSProcessInfo processInfo] isOperatingSystemAtLeastVersion:(NSOperatingSystemVersion){13,2,0}])
        self = [super initWithCoder:coder];
    else {
        self = [super initWithFrame:CGRectMake(16, 3, 343, 605)];
        self.editable = YES;
        self.selectable = YES;
        self.insetsLayoutMarginsFromSafeArea = YES;
        self.clipsToBounds = YES;
        self.clearsContextBeforeDrawing = YES;
        self.autoresizesSubviews = YES;
        self.contentMode = UIViewContentModeScaleToFill;
        self.scrollEnabled = YES;
        self.userInteractionEnabled = YES;
        self.multipleTouchEnabled = YES;
        self.translatesAutoresizingMaskIntoConstraints = NO;
        self.font = [UIFont fontWithName:@"Menlo-Regular" size:12.0];
    }
    return self;
}

注意包含文本视图id的约束,并根据视图或视图控制器中的其他元素id重新创建这些约束。在我的例子中:

- (id) initWithCoder:(NSCoder *)aDecoder
{
    self = [super initWithCoder:aDecoder];
    if (self) {
        [self xibSetup];
        [self initView];
/*
        <constraint firstItem="75C-lt-YtE" firstAttribute="top" secondItem="782-j1-88c" secondAttribute="bottom" constant="8" symbolic="YES" id="8SH-5l-FAs"/>
        <constraint firstItem="782-j1-88c" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leadingMargin" id="Mve-aZ-HCe"/>
        <constraint firstItem="782-j1-88c" firstAttribute="leading" secondItem="75C-lt-YtE" secondAttribute="leading" id="dPG-u3-cCi"/>
        <constraint firstItem="782-j1-88c" firstAttribute="trailing" secondItem="iN0-l3-epB" secondAttribute="trailingMargin" id="sjT-0Q-hNj"/>
        <constraint firstItem="782-j1-88c" firstAttribute="top" secondItem="vUN-kp-3ea" secondAttribute="top" id="vic-vZ-osR"/>
*/
        [self.command.topAnchor constraintEqualToAnchor:self.console.bottomAnchor constant:8].active = YES;
        [self.console.leadingAnchor constraintEqualToAnchor:self.layoutMarginsGuide.leadingAnchor].active = YES;
        [self.console.leadingAnchor constraintEqualToAnchor:self.command.leadingAnchor].active = YES;
        [self.console.trailingAnchor constraintEqualToAnchor:self.trailingAnchor].active = YES;
        [self.console.topAnchor constraintEqualToAnchor:self.safeAreaLayoutGuide.topAnchor].active = YES;

    }
    return self;
}

这样做解决了我的问题,而没有损失所需的功能。幸运的是,我只有一个UITextView要替换。否则,这就站不住脚了。