uni-app SDK升级后 isExistsApp 方法崩溃

uni-app SDK升级后 isExistsApp 方法崩溃

开发环境 版本号 项目创建方式
Mac 10.15.7 HBuilderX

示例代码：

// 运行目录中是否已经存在 App  
// @param appid appid  
- (BOOL)isExistsApp:(NSString *)appid {  
    return [DCUniMPSDKEngine isExistsApp:appid];  
}

操作步骤：

直接调用方法

预期结果：

正常运行

实际结果：

崩溃

bug描述：

把SDK封成Flutter插件，升级SDK后，用9月份的版本还是可以的，在Flutter插件里调用 isExistsApp 时报错并崩溃，崩溃信息如下：

2021-10-26 10:24:02.148637+0800 Runner[52946:440226] -[__NSDictionaryM length]: unrecognized selector sent to instance 0x600001abc0a0
2021-10-26 10:24:02.171834+0800 Runner[52946:440226] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSDictionaryM length]: unrecognized selector sent to instance 0x600001abc0a0'
First throw call stack:
(
0   CoreFoundation                      0x00007fff2041daf2 exceptionPreprocess + 242
1   libobjc.A.dylib                     0x00007fff20177e78 objc_exception_throw + 48
2   CoreFoundation                      0x00007fff2042c6f7 +[NSObject(NSObject) instanceMethodSignatureForSelector:] + 0
3   CoreFoundation                      0x00007fff20422032 __forwarding + 1489
4   CoreFoundation                      0x00007fff20424068 _CF_forwarding_prep_0 + 120
5   Foundation                          0x00007fff207f99ec -[NSPathStore2 stringByAppendingPathComponent:] + 121
6   Runner                              0x000000010f9c512e +[PTPathUtil appRootPathWithAppidL:] + 89
7   Runner                              0x000000010f9e55a2 +[DCUniMPSDKEngine isExistsApp:] + 86
8   Runner                              0x000000010fc45ab2 -[YingziFlutterAppletPlugin isExistsApp:] + 66
9   Runner                              0x000000010fc448ba -[YingziFlutterAppletPlugin handleMethodCall:result:] + 2346
10  Flutter                             0x0000000110ed5fca 45-[FlutterMethodChannel setMethodCallHandler:]_block_invoke + 104
11  Flutter                             0x000000011068e1fa _ZNK7flutter21PlatformMessageRouter21HandlePlatformMessageEN3fml6RefPtrINS_15PlatformMessageEEE + 166
12  Flutter                             0x000000011069340a _ZN7flutter15PlatformViewIOS21HandlePlatformMessageEN3fml6RefPtrINS_15PlatformMessageEEE + 38
13  Flutter                             0x0000000110a20ab9 _ZNSt3110function6__funcIZN7flutter5Shell29OnEngineHandlePlatformMessageEN3fml6RefPtrINS2_15PlatformMessageEEEE4$_36NS_9allocatorIS8_EEFvvEEclEv + 83
14  Flutter                             0x00000001109a469a _ZN3fml15MessageLoopImpl10FlushTasksENS_9FlushTypeE + 160
15  Flutter                             0x00000001109a90e6 _ZN3fml17MessageLoopDarwin11OnTimerFireEP16CFRunLoopTimerPS0_ + 26
16  CoreFoundation                      0x00007fff2038cc47 CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION + 20
17  CoreFoundation                      0x00007fff2038c71a CFRunLoopDoTimer + 926
18  CoreFoundation                      0x00007fff2038bccd CFRunLoopDoTimers + 265
19  CoreFoundation                      0x00007fff2038634e __CFRunLoopRun + 1949
20  CoreFoundation                      0x00007fff203856c6 CFRunLoopRunSpecific + 567
21  GraphicsServices                    0x00007fff2b76adb3 GSEventRunModal + 139
22  UIKitCore                           0x00007fff24675187 -[UIApplication _run] + 912
23  UIKitCore                           0x00007fff2467a038 UIApplicationMain + 101
24  Runner                              0x000000010f862580 main + 112
25  libdyld.dylib                       0x00007fff20256409 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSDictionaryM length]: unrecognized selector sent to instance 0x600001abc0a0'
terminating with uncaught exception of type NSException
CoreSimulator 732.18.0.2 - Device: iPhone 12 (3DF07B45-73D7-4880-BEBD-4EC582929534) - Runtime: iOS 14.2 (18B79) - DeviceType: iPhone 12
(Recorded stack frame)


更多关于uni-app SDK升级后 isExistsApp 方法崩溃的实战教程也可以访问 https://www.itying.com/category-93-b0.html

1 回复

更多关于uni-app SDK升级后 isExistsApp 方法崩溃的实战教程也可以访问 https://www.itying.com/category-93-b0.html


根据崩溃信息 -[__NSDictionaryM length]: unrecognized selector sent to instance，问题出在 isExistsApp: 方法内部调用 stringByAppendingPathComponent: 时，参数类型错误。从堆栈看，PTPathUtil appRootPathWithAppidL: 期望传入一个 NSString 类型的 appid，但实际传入了一个 NSDictionary 对象。

原因分析：

  1. 参数类型不匹配：Flutter 插件调用原生方法时，传入的 appid 参数可能被错误地包装成了字典（NSDictionary），而不是字符串（NSString）。
  2. SDK 升级兼容性问题：升级 uni-app SDK 后，DCUniMPSDKEngine 内部对参数类型的校验或处理可能发生变化，导致传入错误类型时崩溃。

解决方案：

  1. 检查 Flutter 插件传参：确保调用 isExistsApp: 时，appid 参数是字符串类型，而非 Map/Dictionary。检查 Flutter 侧代码，确认 MethodChannel 调用时参数类型正确。
  2. 验证参数类型：在原生 iOS 代码中，对传入的 appid 进行类型校验，例如：
    - (BOOL)isExistsApp:(id)appid {
    if (![appid isKindOfClass:[NSString class]]) {
        // 处理类型错误，如返回 NO 或抛出异常
        return NO;
    }
    return [DCUniMPSDKEngine isExistsApp:appid];
}
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