问题描述
我正在开发使用 Geofencing 插件的 Flutter 应用程序。当我在 iOS 模拟器中运行该应用程序时，它运行良好，但是当我尝试在我的手机上运行它时，该应用程序在启动时崩溃：
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000000000000
VM Region Info: 0 is not in any region. Bytes before following region: 4300980224
REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL
UNUSED SPACE AT START
--->
__TEXT 1005bc000-100a88000 [ 4912K] r-x/r-x SM=COW ...er.app/Runner
Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL,Code 0xb
Terminating Process: exc handler [27910]
Triggered by Thread: 0
Thread 0 name: dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libswiftCore.dylib 0x000000019ca7e6e4 swift_getobjectType + 40
1 Runner 0x00000001005c3630 @objc AppDelegate.registerPlugins(inRegistry:) + 30256 (<compiler-generated>:38)
2 Runner 0x00000001005c3630 @objc AppDelegate.registerPlugins(inRegistry:) + 30256 (<compiler-generated>:38)
3 geofencing 0x0000000100ff9a14 -[GeofencingPlugin startGeofencingService:] + 23060 (GeofencingPlugin.m:178)
4 geofencing 0x0000000100ff8dec -[GeofencingPlugin handleMethodCall:result:] + 19948 (GeofencingPlugin.m:49)
5 Flutter 0x0000000101912804 0x101380000 + 5842948
6 Flutter 0x00000001013b330c 0x101380000 + 209676
7 Flutter 0x00000001016ab908 0x101380000 + 3324168
8 Flutter 0x000000010164ca10 0x101380000 + 2935312
9 Flutter 0x000000010164e870 0x101380000 + 2943088
10 CoreFoundation 0x0000000198a45fa0 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 32
11 CoreFoundation 0x0000000198a45ba0 __CFRunLoopDoTimer + 1064
12 CoreFoundation 0x0000000198a44ffc __CFRunLoopDoTimers + 328
13 CoreFoundation 0x0000000198a3eee4 __CFRunLoopRun + 1936
14 CoreFoundation 0x0000000198a3e21c CFRunLoopRunSpecific + 600
15 GraphicsServices 0x00000001b0bf0784 GSEventRunModal + 164
16 UIKitCore 0x000000019b47ff58 -[UIApplication _run] + 1072
17 UIKitCore 0x000000019b4857cc UIApplicationMain + 168
18 Runner 0x00000001005c3718 main + 30488 (AppDelegate.swift:9)
19 libdyld.dylib 0x00000001986fe6b0 start + 4
我的 AppDelegate.swift 文件如下所示：
@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
override func application(_ application: UIApplication,didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
) -> Bool {
// Register plugins which talk to Dart and Flutter.
registerPlugins(inRegistry: self)
// 2020-11 DC - My understanding here is that we need to pass the geofencing plugin a method call so that when it's called in the background,// it can initialize all the plugins which will not have been regsitered because the app has not been started.
// The intent is to ensure that other plugins get initialized so the geofencing plugin can send messages through to the Flutter app.
// However because this version of the plugin was written in Objective-C it expects a C convention callback which Swift does not handle directly.
// Hence we have to use this code which takes a swift selector and converts it to a C functioon pointer which we can give the the plugin.
let selector = #selector(registerPlugins(inRegistry:))
let signature = (@convention(c) (FlutterPluginRegistry) -> Void).self
let method = unsafeBitCast(self.method(for: selector),to: signature)
GeofencingPlugin.setPluginRegistrantCallback(method)
return super.application(application,didFinishLaunchingWithOptions: launchOptions)
}
@objc
func registerPlugins(inRegistry registry: FlutterPluginRegistry) {
os_log("? AppDelegate: Registering plugins ...",type: .debug)
GeneratedpluginRegistrant.register(with: registry)
}
}
我不知道问题出在哪里。堆栈跟踪似乎表明正在调用回调，因此我认为它必须已正确注册。
有什么想法可能出问题了吗？
解决方法
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