ios – 只要激活带有链接的文本视图,应用程序就会崩溃

概述堆栈跟踪： * thread #1: tid = 0x1ee50f, 0x00000001096f5d05 libswiftFoundation.dylib`static Foundation.DateComponents._unconditionallyBridgeFromObjectiveC (Swift.Optional<__ObjC.NSDateComponents>) -> Founda 堆栈跟踪：

* thread #1: tID = 0x1ee50f,0x00000001096f5d05 libswiftFoundation.dylib`static Foundation.DateComponents._unconditionallyBrIDgeFromObjectiveC (Swift.Optional<__ObjC.NSDateComponents>) -> Foundation.DateComponents with unmangled suffix "_merged" + 85,queue = 'com.apple.main-thread',stop reason = EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP,subcode=0x0)frame #0: 0x00000001096f5d05 libswiftFoundation.dylib`static Foundation.DateComponents._unconditionallyBrIDgeFromObjectiveC (Swift.Optional<__ObjC.NSDateComponents>) -> Foundation.DateComponents with unmangled suffix "_merged" + 85frame #1: 0x000000010558e36f Invest`@objc InvestDashboard.textVIEw(UITextVIEw,shouldInteractWith : URL,in : _NSRange) -> Bool + 79 at InvestDashboard.swift:0frame #2: 0x000000011fd478fc UIKit`-[UITextVIEwAccessibility accessibilityActivate] + 838frame #3: 0x000000011fed29d2 UIAccessibility`-[NSObject(UIStorage) accessibilityPerformAction:withValue:fencePort:] + 1448frame #4: 0x000000011feaa63d UIAccessibility`_performActionCallback + 163frame #5: 0x000000011fc0cec4 AXRuntime`_AXXMIgperformAction + 107frame #6: 0x000000011fc06f06 AXRuntime`_XPerformAction + 216frame #7: 0x000000011fc16541 AXRuntime`mshMIgperform + 266frame #8: 0x0000000106d1ff89 CoreFoundation`__CFRUNLOOP_IS_CALliNG_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 41frame #9: 0x0000000106d1ff01 CoreFoundation`__CFRunLoopDoSource1 + 465frame #10: 0x0000000106d18045 CoreFoundation`__CFRunLoopRun + 2389frame #11: 0x0000000106d17494 CoreFoundation`CFRunLoopRunspecific + 420frame #12: 0x000000010cc38a6f GraphiCSServices`GSEventRunModal + 161frame #13: 0x00000001078c2964 UIKit`UIApplicationMain + 159frame #14: 0x000000010467e99f InvestDemo`main + 111 at AppDelegate.swift:29frame #15: 0x000000010b88268d libdyld.dylib`start + 1frame #16: 0x000000010b88268d libdyld.dylib`start + 1

每当我在TextVIEw上使用activate时会发生这种情况.我尝试了很多不同的东西,比如覆盖accessibilityActivate() – > Bool但应用程序在此方法被调用之前崩溃了.有什么建议？

解决方法 我解决了这个问题并希望分享,以便其他具有同样令人困惑的问题的人可以解决它.

首先要做的是继承UITextVIEw,并在该子类中覆盖func accessibilityActivate() – >布尔.然后创建一个委托来处理激活TextVIEw时发生的事情并通过重写方法调用它.

然后根据UIAccessibilityIsVoiceOverRunning()设置TextVIEw的委托,因此如果正在运行语音,则将UITextVIEwDelegate设置为nil,以防止崩溃发生,然后激活 *** 作由您在上面的子类中覆盖的方法处理.最后,为UIAccessibilityVoiceOverStatusChanged设置一个监听器,并在从off到on时将UITextVIEwDelegate设置为nil,并将其设置为相反方案的原始委托类.

一些代码：

//: Playground - noun: a place where people can playimport UIKitclass Test : UITabbarController,UITextVIEwDelegate,ActivationDelegate {    var voiceOverRunning : Bool {        get {            return UIAccessibilityIsVoiceOverRunning()        }    }    var testVIEw = AccessibilityVIEw()    overrIDe func vIEwDIDLoad() {        if !voiceOverRunning {            testVIEw.delegate = self        } else {            testVIEw.activationDelegate = self        }        NotificationCenter.default.addobserver(            self,selector: #selector(self.dIDChangeVoiceOver),name: NSNotification.name(rawValue: UIAccessibilityVoiceOverStatusChanged),object: nil)    }    func doStuff() {        /*         Do what you want to happen here on activation         */    }    @objc    func dIDChangeVoiceOver(){        testVIEw.delegate              = voiceOverRunning ? nil : self        testVIEw.activationDelegate    = voiceOverRunning ? self : nil    }}protocol ActivationDelegate : class {    func doStuff()}class AccessibilityVIEw : UITextVIEw {    var activationDelegate : ActivationDelegate!    overrIDe func accessibilityActivate() -> Bool {        activationDelegate.doStuff()        return true    }}

总结

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