fix: demo crash

Author: yulingtianxia

dart_native/example/lib/ios/ios_main.dart

@@ -23,7 +23,6 @@ class _IOSAppState extends State<IOSApp> {
   Future<void> initPlatformState() async {
     RuntimeSon stub = RuntimeSon();
     DelegateStub delegate = DelegateStub();
-    testIOS(stub, delegate);
     // Benchmark
     String testString =
         'This is a long string: sdlfdksjflksndhiofuu2893873(*（%￥#@）*&……￥撒肥料开发时傅雷家书那份会计师东方丽景三等奖';
@@ -41,6 +40,7 @@ class _IOSAppState extends State<IOSApp> {
     }
 
     print("DartNative Cost: ${DateTime.now().millisecondsSinceEpoch - time}");
+    testIOS(stub, delegate);
   }
 
   @override

dart_native/example/lib/ios/unit_test.dart

@@ -154,24 +154,15 @@ testIOS(RuntimeStub stub, DelegateStub delegate) {
   NSNotificationCenter.defaultCenter.addObserver(
       delegate, delegate.handleNotification, 'SampleDartNotification', nil);
 
-  Isolate.spawn(_checkTimer, stub.pointer.address);
-  Isolate.spawn(_checkTimer1, stub.pointer.address);
+  Isolate.spawn(_checkTimer, 'isolate0');
+  Isolate.spawn(_checkTimer, 'isolate1');
 }
 
-void _checkTimer(int addr) async {
-  RuntimeStub stub = RuntimeStub.fromPointer(Pointer.fromAddress(addr));
+void _checkTimer(String isolateID) async {
+  RuntimeStub stub = RuntimeStub();
   Timer.periodic(new Duration(seconds: 1), (Timer t) {
     stub.fooCompletion(() {
-      print('hello completion block on another isolate!');
-    });
-  });
-}
-
-void _checkTimer1(int addr) async {
-  RuntimeStub stub = RuntimeStub.fromPointer(Pointer.fromAddress(addr));
-  Timer.periodic(new Duration(seconds: 1), (Timer t) {
-    stub.fooCompletion(() {
-      print('hello completion block on third isolate!');
+      print('hello completion block on $isolateID!');
     });
   });
 }

dart_native/ios/Classes/DNObjectDealloc.m

@@ -62,19 +62,13 @@ - (instancetype)initWithHost:(NSObject *)host
     if (self) {
         _host = host;
         _hostAddress = (int64_t)host;
-//        if ([host isKindOfClass:NSClassFromString(@"Fuck")]) {
-//            fuxk = _hostAddress;
-//        }
         _dartPort = dartPort;
         objc_setAssociatedObject(host, _cmd, self, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
     }
     return self;
 }
 
 - (void)dealloc {
-//    if (_hostAddress == fuxk) {
-//        
-//    }
     NotifyDeallocToDart(_hostAddress, _dartPort);
 }
 

dart_native/ios/DartNative.framework/DartNative

@@ -2,11 +2,9 @@ import 'dart:ffi';
 
 import 'package:dart_native/src/ios/common/callback_manager.dart';
 import 'package:dart_native/src/ios/common/library.dart';
-import 'package:dart_native/src/ios/runtime/class.dart';
 import 'package:dart_native/src/ios/runtime/internal/block_lifecycle.dart';
 import 'package:dart_native/src/ios/runtime/internal/native_runtime.dart';
 import 'package:dart_native/src/ios/runtime/nsobject.dart';
-import 'package:ffi/ffi.dart';
 
 void passObjectToNative(NSObject obj) {
   // Ignore null and nil
@@ -31,9 +29,6 @@ void _dealloc(Pointer<Void> ptr) {
     });
     _finalizerMap.remove(ptr);
   }
-  if (isolateDeadObject.finalizer == null) {
-    isolateDeadObject.finalizer = () {};
-  }
 }
 
 Map<Pointer<Void>, List<Finalizer>> _finalizerMap = {};
@@ -57,11 +52,3 @@ removeFinalizerForObject(NSObject obj) {
 
 Pointer<NativeFunction<Void Function(Pointer<Void>)>> nativeObjectDeallocPtr =
     Pointer.fromFunction(_dealloc);
-
-final Fuck isolateDeadObject = Fuck();
-
-class Fuck extends NSObject {
-  Fuck([Class isa]) : super(isa ?? Class('Fuck', Class('NSObject')));
-
-  Fuck.fromPointer(Pointer<Void> ptr) : super.fromPointer(ptr);
-}

dart_native/lib/src/ios/runtime/internal/nsobject_lifecycle.dart

@@ -26,6 +26,8 @@ class NSObject extends id {
     passObjectToNative(this);
   }
 
+  /// Before call [fromPointer], MAKE SURE the [ptr] for object exists.
+  /// If [ptr] was already freed, you would get a crash!
   NSObject.fromPointer(Pointer<Void> ptr) : super(ptr) {
     if (ptr == null || object_isClass(ptr) != 0) {
       throw 'Pointer $ptr is not for NSObject!';