ios - Xcode 11 模拟器 - 检查暗模式是否激活时的 SIGABRT

Question

我目前正在调整我的应用程序以与新的 iOS 13 功能兼容。我在 Firebase Remote Config 中存储了一些颜色值，用于浅色和深色模式，我想根据用户的设置使用它们，但是当我访问 traitCollection 的属性时，模拟器在禁用暗模式时崩溃。一旦启用暗模式，一切都很好。

我该如何解决这个问题？

根据我阅读 Apple 文档的理解，默认模式是浅色模式，因此我想我可以创建一个简单的 if 语句来请求启用暗模式。您可以在下面看到代码中的方法。它在我的 ViewController 的 viewDidLoad 中被调用:

    func renderCustomUI() {
        var primaryColor = UIColor()
        var secondaryColor = UIColor()
        if #available(iOS 13.0, *) {
            // crash !
            if traitCollection.userInterfaceStyle == .dark {
                primaryColor = UIFunctions.shared.getPrimaryColor(darkMode: true)
                secondaryColor = UIFunctions.shared.getSecondaryColor(darkMode: true)
            }
        } else {
            primaryColor = UIFunctions.shared.getPrimaryColor(darkMode: false)
            secondaryColor = UIFunctions.shared.getSecondaryColor(darkMode: false)
        }

        let navBar = navigationController?.navigationBar
        navBar?.barTintColor = primaryColor
        navBar?.tintColor = secondaryColor

        self.refreshControl.tintColor = primaryColor

        let homeButton = self.navigationItem.leftBarButtonItem!
        homeButton.setIcon(icon: .ionicons(.iosInformationOutline), iconSize: CGFloat(IconSizes.navBarIcon.rawValue)+3, color: secondaryColor)
        pastEventsSegment.tintColor = primaryColor
        // set border bottom of nav bar to color
        self.navigationController?.setNavigationBarBorderColor(primaryColor)

        setupFont(color: secondaryColor)
    }

public func getPrimaryColor(darkMode: Bool) -> UIColor {
    var color = UIColor()
    var primaryColorHex = ""
    if darkMode {
        primaryColorHex = RemoteConfig.remoteConfig()
        .configValue(forKey: "primaryColorDark")
        .stringValue ?? ""
    } else {
        // light mode and previous iOS versions
        primaryColorHex = RemoteConfig.remoteConfig()
            .configValue(forKey: "primaryColorDefault")
            .stringValue ?? ""
    }
    color = self.hexStringToUIColor(hex: primaryColorHex)
    return color
}

我希望我能以这种方式对暗模式使用react，任何其他情况都会使用我的应用程序的默认着色，这相当于亮模式。低于 iOS 13 的设备也将获得默认颜色。

2019-09-23 12:51:20.449882+0200 Kaerwaradar[6231:311159] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -isEqual: not defined for the UIColor <UIPlaceholderColor: 0x60000272f5a0>; need to first convert colorspace.'
*** First throw call stack:
(
    0   CoreFoundation                      0x00007fff23b98bde __exceptionPreprocess + 350
    1   libobjc.A.dylib                     0x00007fff503b5b20 objc_exception_throw + 48
    2   CoreFoundation                      0x00007fff23b98a1c +[NSException raise:format:] + 188
    3   UIKitCore                           0x00007fff46d5a397 raiseWithColorSpaceError + 96
    4   UIKitCore                           0x00007fff46d5a3f9 -[UIColor isEqual:] + 9
    5   UIKitCore                           0x00007fff467e09fc -[UINavigationBar setBarTintColor:] + 59
    6   Kaerwaradar                         0x0000000107e57a92 $s11Kaerwaradar18HomeViewControllerC14renderCustomUIyyF + 1266
    7   Kaerwaradar                         0x0000000107e52649 $s11Kaerwaradar18HomeViewControllerC11viewDidLoadyyF + 1033
    8   Kaerwaradar                         0x0000000107e5321b $s11Kaerwaradar18HomeViewControllerC11viewDidLoadyyFTo + 43
    9   UIKitCore                           0x00007fff46af87c2 -[UIViewController _sendViewDidLoadWithAppearanceProxyObjectTaggingEnabled] + 83
    10  UIKitCore                           0x00007fff46afd6d3 -[UIViewController loadViewIfRequired] + 1084
    11  UIKitCore                           0x00007fff46a6208c -[UINavigationController _updateScrollViewFromViewController:toViewController:] + 160
    12  UIKitCore                           0x00007fff46a6238c -[UINavigationController _startTransition:fromViewController:toViewController:] + 140
    13  UIKitCore                           0x00007fff46a63256 -[UINavigationController _startDeferredTransitionIfNeeded:] + 868
    14  UIKitCore                           0x00007fff46a645c1 -[UINavigationController __viewWillLayoutSubviews] + 150
    15  UIKitCore                           0x00007fff46a45ffb -[UILayoutContainerView layoutSubviews] + 217
    16  UIKitCore                           0x00007fff47636722 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2478
    17  QuartzCore                          0x00007fff2b030ef9 -[CALayer layoutSublayers] + 255
    18  QuartzCore                          0x00007fff2b0358ff _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 517
    19  QuartzCore                          0x00007fff2b041fe4 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 80
    20  QuartzCore                          0x00007fff2af8a4a8 _ZN2CA7Context18commit_transactionEPNS_11TransactionEd + 324
    21  QuartzCore                          0x00007fff2afbfab3 _ZN2CA11Transaction6commitEv + 643
    22  UIKitCore                           0x00007fff4717a1e1 __34-[UIApplication _firstCommitBlock]_block_invoke_2 + 81
    23  CoreFoundation                      0x00007fff23afb8ec __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12
    24  CoreFoundation                      0x00007fff23afb058 __CFRunLoopDoBlocks + 312
    25  CoreFoundation                      0x00007fff23af5ee4 __CFRunLoopRun + 1284
    26  CoreFoundation                      0x00007fff23af56b6 CFRunLoopRunSpecific + 438
    27  GraphicsServices                    0x00007fff3815cbb0 GSEventRunModal + 65
    28  UIKitCore                           0x00007fff47162a67 UIApplicationMain + 1621
    29  Kaerwaradar                         0x0000000107e14d1b main + 75
    30  libdyld.dylib                       0x00007fff5123bcf5 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

Answer 1

iOS 13 灯光模式下颜色设置不正确。

if #available(iOS 13.0, *) {
    let isDark = traitCollection.userInterfaceStyle == .dark
    primaryColor = UIFunctions.shared.getPrimaryColor(darkMode: isDark)
    secondaryColor = UIFunctions.shared.getSecondaryColor(darkMode: isDark)
} else {
    primaryColor = UIFunctions.shared.getPrimaryColor(darkMode: false)
    secondaryColor = UIFunctions.shared.getSecondaryColor(darkMode: false)
}