这个错误的困扰了我半天，具体错误如下：
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[meetingbot4ios.AppDelegate window]: unrecognized selector sent to instance 0x60000370c0c0'
*** First throw call stack:
(
0 CoreFoundation 0x00000001804ae0f8 __exceptionPreprocess + 172
1 libobjc.A.dylib 0x0000000180087db4 objc_exception_throw + 56
2 CoreFoundation 0x00000001804c2f48 +[NSObject(NSObject) instanceMethodSignatureForSelector:] + 0
3 CoreFoundation 0x00000001804b2024 forwarding + 732
4 CoreFoundation 0x00000001804b456c _CF_forwarding_prep_0 + 92
5 MobileRTC 0x00000001125bed2c MobileRTC + 16624940
6 CoreFoundation 0x00000001803de7a8 CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER + 140
7 CoreFoundation 0x00000001803de6cc ___CFXRegistrationPost_block_invoke + 84
8 CoreFoundation 0x00000001803ddbbc _CFXRegistrationPost + 404
9 CoreFoundation 0x00000001803dd598 _CFXNotificationPost + 688
10 MobileRTC 0x0000000112792840 MobileRTC + 18540608
11 MobileRTC 0x0000000113b82624 MobileRTC + 39446052
12 MobileRTC 0x0000000113b7f7a8 MobileRTC + 39434152
13 MobileRTC 0x0000000113d0f0b0 MobileRTC + 41070768
14 MobileRTC 0x0000000113cfc4b0 MobileRTC + 40993968
15 MobileRTC 0x0000000113cfe520 MobileRTC + 41002272
16 MobileRTC 0x0000000111675520 MobileRTC + 595232
17 MobileRTC 0x0000000113cfde1c MobileRTC + 41000476
18 MobileRTC 0x0000000113b83188 MobileRTC + 39448968
19 MobileRTC 0x0000000113516a04 MobileRTC + 32713220
20 MobileRTC 0x00000001116540bc MobileRTC + 458940
21 meetingbot4ios 0x0000000102d00fe8 $s14meetingbot4ios11AppDelegateC11joinMeeting33_AF24E5846D9D1EA8BDA822FD40DAC3E8LLyyF + 700
22 meetingbot4ios 0x0000000102d00858 $s14meetingbot4ios11AppDelegateC21onMobileRTCAuthReturnyySo0eF5ErrorVF + 308
23 meetingbot4ios 0x0000000102d00b28 $s14meetingbot4ios11AppDelegateC21onMobileRTCAuthReturnyySo0eF5ErrorVFTo + 44
24 libdispatch.dylib 0x00000001030a7ec4 _dispatch_call_block_and_release + 24
25 libdispatch.dylib 0x00000001030a973c _dispatch_client_callout + 16
26 libdispatch.dylib 0x00000001030b93f8 _dispatch_main_queue_drain + 1228
27 libdispatch.dylib 0x00000001030b8f1c _dispatch_main_queue_callback_4CF + 40
28 CoreFoundation 0x000000018040e960 CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE + 12
29 CoreFoundation 0x0000000180409078 __CFRunLoopRun + 1936
30 CoreFoundation 0x00000001804084d4 CFRunLoopRunSpecific + 572
31 GraphicsServices 0x000000018ef2aae4 GSEventRunModal + 160
32 UIKitCore 0x00000001853d0a28 -[UIApplication _run] + 868
33 UIKitCore 0x00000001853d46b0 UIApplicationMain + 124
34 SwiftUI 0x00000001ccf100e4 OUTLINED_FUNCTION_65 + 492
35 SwiftUI 0x00000001ccf0ff8c OUTLINED_FUNCTION_65 + 148
36 SwiftUI 0x00000001ccbcd6d8 OUTLINED_FUNCTION_0 + 92
37 meetingbot4ios 0x0000000102cf7618 s14meetingbot4ios10MeetingBotV5mainyyFZ + 40
38 meetingbot4ios 0x0000000102d07e10 main + 12
39 dyld 0x0000000103635544 start_sim + 20
40 ??? 0x000000010314a154 0x0 + 4346650964
41 ??? 0x8e7d000000000000 0x0 + 10267362725474598912
)
libc++abi: terminating due to uncaught exception of type NSException
下面是我的解决办法。
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
// 其他代码...
}
只需要在其中增加var window: UIWindow?这行代码就可以了。