我收到粘贴板内容更改通知后收到很多崩溃

Posted 2023-02-14

我收到粘贴板内容更改通知后收到许多崩溃。我只是监视剪贴板的更改，并尝试识别文本内容。

这是我的代码：

        class PasteboardMonitor 

            init() 
                addPasteboardMonitor()
            

            func addPasteboardMonitor() 

                handleContentFromPasteBoard(conent: UIPasteboard.general.string, identifier: "\(UIPasteboard.general.changeCount)")

                NotificationCenter.default.addObserver(self, selector: #selector(didReceivedPasteboardNotification(noti:)), name: UIPasteboard.changedNotification, object: nil)
                NotificationCenter.default.addObserver(self, selector: #selector(didReceivedPasteboardNotification(noti:)), name: UIApplication.willEnterForegroundNotification, object: nil)
                NotificationCenter.default.addObserver(self, selector: #selector(didReceivedApplicationNotification), name: UIApplication.willResignActiveNotification, object: nil)
            

           func handleContentFromPasteBoard(conent: String?, identifier: String? = nil) 
                //handle content
                ...
           

           @objc func didReceivedPasteboardNotification(noti: Notification) 
                handleContentFromPasteBoard(conent: UIPasteboard.general.string, identifier: "\(UIPasteboard.general.changeCount)")
            

崩溃日志是：

• 崩溃：com.apple.UIKit.pasteboard.cache-queue
• 0 libsystem_pthread.dylib 0x1963b5a38 ___chkstk_darwin + 64
• 1 libdispatch.dylib 0x19635f49c _dispatch_mach_send_and_wait_for_reply + 440
• 2 libdispatch.dylib 0x19635f904 dispatch_mach_send_with_result_and_wait_for_reply + 56
• 3 libxpc.dylib 0x19629f594 xpc_connection_send_message_with_reply_sync + 240
• 4 Foundation 0x196ba51fc NSXPCCONNECTION_IS_WAITING_FOR_A_SYNCHRONOUS_REPLY + 16
• 5 Foundation 0x19696b090-[NSXPCConnection _sendInvocation：orArguments：count：methodSignature：selector：withProxy：] + 2704
• 6 Foundation 0x19696a40c-[NSXPCConnection _sendSelector：withProxy：arg1：] + 128
• 7基础0x196bac2ac _NSXPCDistantObjectSimpleMessageSend1 + 40
• 8粘贴板0x1ac476aac-[PBServerConnection localGeneralPasteboard：]
• 9 UIKitCore 0x19a6c3428 _getTemporaryLocalGeneralPasteboard + 64
• 10 UIKitCore 0x19a6c2444 _pasteboardCacheQueue_existingItemCollectionWithName + 152
• 11 UIKitCore 0x19a6c2160 __59 + [_ UIConcretePasteboard _pasteboardNamed：createIfNotFound：] _ block_invoke + 236
• 12 libdispatch.dylib 0x196349fd8 _dispatch_client_callout + 20
• 13 libdispatch.dylib 0x1963567f4 _dispatch_lane_barrier_sync_invoke_and_complete + 60...
• 218 UIKitCore 0x19a6c1fcc + [_ UIConcretePasteboard _pasteboardNamed：createIfNotFound：] + 396
• 219 TovApp 0x1014e4a54 PasteboardMonitor.didReceivedPasteboardNotification（noti :) + 123（PasteboardMonitor.swift：123）
• 220 TovApp 0x1014e4c4c @objc PasteboardMonitor.didReceivedPasteboardNotification（noti :) + 4351249484（：4351249484）
• 221 Foundation 0x196a6effc __57- [NSNotificationCenter addObserver：selector：name：object：] _ block_invoke_2 + 28
• 222 CoreFoundation 0x1965fc99c CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER + 28
• 223 CoreFoundation 0x1965fc9ec ___CFXRegistrationPost1_block_invoke + 68
• 224 CoreFoundation 0x1965fbce4 _CFXRegistrationPost1 + 396
• 225 CoreFoundation 0x1965fb97c ___CFXNotificationPost_block_invoke + 108
• 226 CoreFoundation 0x196574910-[_ CFXNotificationRegistrar找到：对象：观察者：枚举器：] + 1424
• 227 CoreFoundation 0x1965fb2ac _CFXNotificationPost + 1268
• 228 Foundation 0x19695db8c-[NSNotificationCenter postNotificationName：object：userInfo：] + 64
• 229 UIKitCore 0x19a6c1cd4 _sendPasteboardChangedNotification + 96
• 230 UIKitCore 0x19a6c1fcc + [_ UIConcretePasteboard _pasteboardNamed：createIfNotFound：] + 396
• 231 TovApp 0x1014e4a54 PasteboardMonitor.didReceivedPasteboardNotification（noti :) + 123（PasteboardMonitor.swift：123）
• 232 TovApp 0x1014e4c4c @objc PasteboardMonitor.didReceivedPasteboardNotification（noti :) + 4351249484（：4351249484）
• 233 Foundation 0x196a6effc __57- [NSNotificationCenter addObserver：selector：name：object：] _ block_invoke_2 + 28
• 234 CoreFoundation 0x1965fc99c CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER + 28
• 235 CoreFoundation 0x1965fc9ec ___CFXRegistrationPost1_block_invoke + 68
• 236 CoreFoundation 0x1965fbce4 _CFXRegistrationPost1 + 396
• 237 CoreFoundation 0x1965fb97c ___CFXNotificationPost_block_invoke + 108
• 238 CoreFoundation 0x196574910-[_ CFXNotificationRegistrar找到：对象：观察者：枚举器：] + 1424
• 239 CoreFoundation 0x1965fb2ac _CFXNotificationPost + 1268
• 240 Foundation 0x19695db8c-[NSNotificationCenter postNotificationName：object：userInfo：] + 64
• 241 UIKitCore 0x19a6c1cd4 _sendPasteboardChangedNotification + 96
• 242 UIKitCore 0x19a6c1fcc + [_ UIConcretePasteboard _pasteboardNamed：createIfNotFound：] + 396
• 243 TovApp 0x1014e4a54 PasteboardMonitor.didReceivedPasteboardNotification（noti :) + 123（PasteboardMonitor.swift：123）
• 244 TovApp 0x1014e4c4c @objc PasteboardMonitor.didReceivedPasteboardNotification（noti :) + 4351249484（：4351249484）
• 245 Foundation 0x196a6effc __57- [NSNotificationCenter addObserver：selector：name：object：] _ block_invoke_2 + 28
• 246 CoreFoundation 0x1965fc99c CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER + 28
• 247 CoreFoundation 0x1965fc9ec ___CFXRegistrationPost1_block_invoke + 68
• 248 CoreFoundation 0x1965fbce4 _CFXRegistrationPost1 + 396
• 249 CoreFoundation 0x1965fb97c ___CFXNotificationPost_block_invoke + 108
• 250 CoreFoundation 0x196574910-[_ CFXNotificationRegistrar查找：对象：观察者：枚举器：] + 1424
• 251 CoreFoundation 0x1965fb2ac _CFXNotificationPost + 1268
• 252 Foundation 0x19695db8c-[NSNotificationCenter postNotificationName：object：userInfo：] + 64
• 253 UIKitCore 0x19a6c1cd4 _sendPasteboardChangedNotification + 96
• 254 UIKitCore 0x19a6c1fcc + [_ UIConcretePasteboard _pasteboardNamed：createIfNotFound：] + 396
• 255 TovApp 0x1014e4a54 PasteboardMonitor.didReceivedPasteboardNotification（noti :) + 123（PasteboardMonitor.swift：123）

有人知道为什么会这样吗？以及如何解决？谢谢。

答案

您与NotificationCenter相关的代码似乎有风险。

尝试：

1. 确保仅添加一次观察者：

var observersAdded: Bool = false

func addPasteboardMonitor() 
    ...
    if !observersAdded 
        NotificationCenter.default.addObserver(self ....
        observersAdded = true
    
    ...

2. 删除PasteboardMonitor的析构函数中的观察者：NotificationCenter.default.removeObserver