Question

我是IOS开发的新手，我已经为IOS开发并构建了一个应用程序。 React Native中的Android应用程序在Android中完全正常运行。我还在iPhone模拟器上安装了应用程序进行测试，在应用程序打开后成功构建，然后崩溃，Xcode显示错误堆栈。

堆栈跟踪

2018-03-26 17:18:59.537548+0530 VwWoocommerceAppMain[57934:681649] -[__NSDictionaryM length]: unrecognized selector sent to instance 0x60000023abc0
2018-03-26 17:18:59.555 [fatal][tid:com.facebook.react.AsyncLocalStorageQueue] Exception '-[__NSDictionaryM length]: unrecognized selector sent to instance 0x60000023abc0' was thrown while invoking multiSet on target AsyncLocalStorage with params (
        (
                (
            cart,
                        {
            }
        )
    ),
    5873
)
callstack: (
	0   CoreFoundation                      0x0000000103f8212b __exceptionPreprocess + 171
	1   libobjc.A.dylib                     0x0000000102874f41 objc_exception_throw + 48
	2   CoreFoundation                      0x0000000104003024 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
	3   CoreFoundation                      0x0000000103f04f78 ___forwarding___ + 1432
	4   CoreFoundation                      0x0000000103f04958 _CF_forwarding_prep_0 + 120
	5   VwWoocommerceAppMain                0x0000000101956824 -[RCTAsyncLocalStorage _writeEntry:changedManifest:] + 258
	6   VwWoocommerceAppMain                0x0000000101957104 -[RCTAsyncLocalStorage multiSet:callback:] + 436
	7   CoreFoundation                      0x0000000103f0636c __invoking___ + 140
	8   CoreFoundation                      0x0000000103f06240 -[NSInvocation invoke] + 320
	9   CoreFoundation                      0x0000000103f1ec26 -[NSInvocation invokeWithTarget:] + 54
	10  VwWoocommerceAppMain                0x0000000101966929 -[RCTModuleMethod invokeWithBridge:module:arguments:] + 602
	11  VwWoocommerceAppMain                0x00000001019ac7a8 _ZN8facebook5reactL11invokeInnerEP9RCTBridgeP13RCTModuleDatajRKN5folly7dynamicE + 266
	12  VwWoocommerceAppMain                0x00000001019ac522 ___ZN8facebook5react15RCTNativeModule6invokeEjON5folly7dynamicEi_block_invoke + 78
	13  libdispatch.dylib                   0x0000000108bf32f7 _dispatch_call_block_and_release + 12
	14  libdispatch.dylib                   0x0000000108bf433d _dispatch_client_callout + 8
	15  libdispatch.dylib                   0x0000000108bfc855 _dispatch_queue_serial_drain + 1162
	16  libdispatch.dylib                   0x0000000108bfd1ea _dispatch_queue_invoke + 336
	17  libdispatch.dylib                   0x0000000108bf8f7c _dispatch_queue_override_invoke + 733
	18  libdispatch.dylib                   0x0000000108c00102 _dispatch_root_queue_drain + 772
	19  libdispatch.dylib                   0x0000000108bffda0 _dispatch_worker_thread3 + 132
	20  libsystem_pthread.dylib             0x00000001091465a2 _pthread_wqthread + 1299
	21  libsystem_pthread.dylib             0x000000010914607d start_wqthread + 13
)
2018-03-26 17:18:59.558030+0530 VwWoocommerceAppMain[57934:681649] Exception '-[__NSDictionaryM length]: unrecognized selector sent to instance 0x60000023abc0' was thrown while invoking multiSet on target AsyncLocalStorage with params (
        (
                (
            cart,
                        {
            }
        )
    ),
    5873
)
callstack: (
	0   CoreFoundation                      0x0000000103f8212b __exceptionPreprocess + 171
	1   libobjc.A.dylib                     0x0000000102874f41 objc_exception_throw + 48
	2   CoreFoundation                      0x0000000104003024 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
	3   CoreFoundation                      0x0000000103f04f78 ___forwarding___ + 1432
	4   CoreFoundation                      0x0000000103f04958 _CF_forwarding_prep_0 + 120
	5   VwWoocommerceAppMain                0x0000000101956824 -[RCTAsyncLocalStorage _writeEntry:changedManifest:] + 258
	6   VwWoocommerceAppMain                0x0000000101957104 -[RCTAsyncLocalStorage multiSet:callback:] + 436
	7   CoreFoundation                      0x0000000103f0636c __invoking___ + 140
	8   CoreFoundation                      0x0000000103f06240 -[NSInvocation invoke] + 320
	9   CoreFoundation                      0x0000000103f1ec26 -[NSInvocation invokeWithTarget:] + 54
	10  VwWoocommerceAppMain                0x0000000101966929 -[RCTModuleMethod invokeWithBridge:module:arguments:] + 602
	11  VwWoocommerceAppMain                0x00000001019ac7a8 _ZN8facebook5reactL11invokeInnerEP9RCTBridgeP13RCTModuleDatajRKN5folly7dynamicE + 266
	12  VwWoocommerceAppMain                0x00000001019ac522 ___ZN8facebook5react15RCTNativeModule6invokeEjON5folly7dynamicEi_block_invoke + 78
	13  libdispatch.dylib                   0x0000000108bf32f7 _dispatch_call_block_and_release + 12
	14  libdispatch.dylib                   0x0000000108bf433d _dispatch_client_callout + 8
	15  libdispatch.dylib                   0x0000000108bfc855 _dispatch_queue_serial_drain + 1162
	16  libdispatch.dylib                   0x0000000108bfd1ea _dispatch_queue_invoke + 336
	17  libdispatch.dylib                   0x0000000108bf8f7c _dispatch_queue_override_invoke + 733
	18  libdispatch.dylib                   0x0000000108c00102 _dispatch_root_queue_drain + 772
	19  libdispatch.dylib                   0x0000000108bffda0 _dispatch_worker_thread3 + 132
	20  libsystem_pthread.dylib             0x00000001091465a2 _pthread_wqthread + 1299
	21  libsystem_pthread.dylib             0x000000010914607d start_wqthread + 13
)
2018-03-26 17:18:59.561965+0530 VwWoocommerceAppMain[57934:681649] *** Terminating app due to uncaught exception 'RCTFatalException: Exception '-[__NSDictionaryM length]: unrecognized selector sent to instance 0x60000023abc0' was thrown while invoking multiSet on target AsyncLocalStorage with params (
        (
                (
            cart,
                        {
            }
        )
    ),
    5873
)
callstack: (
	0   CoreFoundation                      0x0000000103f8212b __exceptionPreprocess + 171
	1   libobjc.A.dylib                     0x0000000102874f41 objc_exception_throw + 48
	2   CoreFoundation                      0x0000000104003024 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
	3   CoreFoundation                      0x0000000103f04f78 ___forwarding___ + 1432
	4   CoreFoundation                      0x0000000103f04958 _CF_forwarding_prep_0 + 120
	5   VwWoocommerceAppMain                0x0000000101956824 -[RCTAsyncLocalStorage _writeEntry:changedManifest:] + 258
	6   VwWoocommerceAppMain                0x0000000101957104 -[RCTAsyncLocalStorage multiSet:callback:] + 436
	7   CoreFoundation                      0x0000000103f0636c __invoking___ + 140
	8   CoreFoundation                      0x0000000103f06240 -[NSInvocation invoke] + 320
	9   CoreFoundation                      0x0000000103f1ec26 -[NSInvocation invokeWithTarget:] + 54
	10  VwWoocommerceAppMain                0x0000000101966929 -[RCTModuleMethod invokeWithBridge:module:arguments:] + 602
	11  VwWoocommerceAppMain                0x00000001019ac7a8 _ZN8facebook5reactL11invokeInnerEP9RCTBridgeP13RCTModuleDatajRKN5folly7dynamicE + 266
	12  VwWoocommerceAppMain                0x00000001019ac522 ___ZN8facebook5react15RCTNativeModule6invokeEjON5folly7dynamicEi_block_invoke + 78
	13  libdispatch.dylib                   0x0000000108bf32f7 _dispatch_call_block_and_release + 12
	14  libdispatch.dylib                   0x0000000108bf433d _dispatch_client_callout + 8
	15  libdispatch.dylib                   0x0000000108bfc855 _dispatch_queue_serial_drain + 1162
	16  libdispatch.dylib                   0x0000000108bfd1ea _dispatch_queue_invoke + 336
	17  libdispatch.dylib                   0x0000000108bf8f7c _dispatch_queue_override_invoke + 733
	18  libdispatch.dylib                   0x0000000108c00102 _dispatch_root_queue_drain + 772
	19  libdispatch.dylib                   0x0000000108bffda0 _dispatch_worker_thread3 + 132
	20  libsystem_pthread.dylib             0x00000001091465a2 _pthread_wqthread + 1299
	21  libsystem_pthread.dylib             0x000000010914607d start_wqthread + 13
)', reason: 'Exception '-[__NSDictionaryM length]: unrecognized selector sent to instanc...'
*** First throw call stack:
(
	0   CoreFoundation                      0x0000000103f8212b __exceptionPreprocess + 171
	1   libobjc.A.dylib                     0x0000000102874f41 objc_exception_throw + 48
	2   VwWoocommerceAppMain                0x0000000101953a22 RCTFormatError + 0
	3   VwWoocommerceAppMain                0x00000001019ac9bc _ZN8facebook5reactL11invokeInnerEP9RCTBridgeP13RCTModuleDatajRKN5folly7dynamicE + 798
	4   VwWoocommerceAppMain                0x00000001019ac522 ___ZN8facebook5react15RCTNativeModule6invokeEjON5folly7dynamicEi_block_invoke + 78
	5   libdispatch.dylib                   0x0000000108bf32f7 _dispatch_call_block_and_release + 12
	6   libdispatch.dylib                   0x0000000108bf433d _dispatch_client_callout + 8
	7   libdispatch.dylib                   0x0000000108bfc855 _dispatch_queue_serial_drain + 1162
	8   libdispatch.dylib                   0x0000000108bfd1ea _dispatch_queue_invoke + 336
	9   libdispatch.dylib                   0x0000000108bf8f7c _dispatch_queue_override_invoke + 733
	10  libdispatch.dylib                   0x0000000108c00102 _dispatch_root_queue_drain + 772
	11  libdispatch.dylib                   0x0000000108bffda0 _dispatch_worker_thread3 + 132
	12  libsystem_pthread.dylib             0x00000001091465a2 _pthread_wqthread + 1299
	13  libsystem_pthread.dylib             0x000000010914607d start_wqthread + 13
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)

如果有人知道请帮助。

Answer 1

对于IOS，您需要在inittailize上输入一个空对象。

可以使用下面的代码来解决：

AsyncStorage.setItem('@key', JSON.stringify({}))

Answer 2

请避免在ios的异步存储中出现空对象，这将解决您的问题

Answer 3

在AsyncStorage中保存数据时，无论您使用什么数据，始终使用JSON.stringify：

AsyncStorage.setItem('@key', 'will work on Android'))
AsyncStorage.setItem('@key', JSON.stringify('will work on both iOS and Android'))

Answer 4

我遇到了同样的问题。问题是iOS在可变字典上寻找名为length（）的函数，但NSDictionaryM使用count（）。解决方法是对对象进行字符串化，使其不使用可变字典。

Android代码工作正常，对象存储并且没有指向错误函数的函数指针。

在我的项目中，我试图使用asyncstorage持久保存会话密钥。我有一个叫做存储的包装器。我也是新人，所以我可能不会在这里做最好的做法。

import {storage, keys} from './storage';

storage.store(keys.session, res.data).then(()=>{}).catch(()=>{}); //Will crash in iOS, but work fine in Android
storage.store(keys.session, JSON.stringify(res.data)).then(()=>{}).catch(()=>{}); //Will work fine on both.

以下是完整的方法：

getSession(email, password){
    Network.login(email, password)
    .then((res) => {
        if(res.code == 1){
            storage.store(keys.session, JSON.stringify(res.data)).then(()=>{
                //Hurray
            }).catch((error)=>{
                throw new Error(error);
            });
            store.dispatch({
                type: actions.SESSION, 
                session: res.data
            });
            return res.data;
        }else{
            throw new Error(res.data);
        }
    })
    .catch((err) => {
        this.setState({error: err.message});
    });
}

Answer 5

我的问题是 MapboxGL tileUrlTemplates 是一个内部为 false 的数组。在 Android 上运行时错误消息要好得多，只是一个提示。

错误React Native IOS Exception' - [__ NSDictionaryM length]：无法识别的选择器发送到

5 个答案: