feat:avoid iOS dealloc JSValue in main thread,this may cause crash in JavaScriptCore

doric-iOS/Example/Example/ViewController.m

@@ -23,6 +23,7 @@ @implementation ViewController
 - (void)viewDidLoad {
     [super viewDidLoad];
     self.title = @"Doric Demo";
+    [self.navigationController.navigationBar setBackgroundImage:UIImageWithColor(UIColor.whiteColor) forBarMetrics:UIBarMetricsDefault];
     NSString *path = [[NSBundle mainBundle] bundlePath];
     NSString *demoPath = [path stringByAppendingPathComponent:@"src"];
     NSFileManager *mgr = [NSFileManager defaultManager];

doric-iOS/Pod/Classes/Shader/DoricFlowLayoutNode.m

@@ -237,8 +237,9 @@ - (NSDictionary *)itemModelAt:(NSUInteger)position {
         return [self subModelOf:viewId];
     } else {
         DoricAsyncResult *result = [self callJSResponse:@"renderBunchedItems", @(position), @(self.batchCount), nil];
-        JSValue *models = [result waitUntilResult];
+        NSArray *array = [result waitUntilResult:^(JSValue *models) {
-        NSArray *array = [models toArray];
+            return [models toArray];
+        }];
         [array enumerateObjectsUsingBlock:^(NSDictionary *obj, NSUInteger idx, BOOL *stop) {
             NSString *thisViewId = obj[@"id"];
             [self setSubModel:obj in:thisViewId];

doric-iOS/Pod/Classes/Shader/DoricListNode.m

@@ -178,8 +178,9 @@ - (NSDictionary *)itemModelAt:(NSUInteger)position {
             batchCount++;
         }
         DoricAsyncResult *result = [self callJSResponse:@"renderBunchedItems", @(start), @(batchCount), nil];
-        JSValue *models = [result waitUntilResult];
+        NSArray *array = [result waitUntilResult:^(JSValue *models) {
-        NSArray *array = [models toArray];
+            return [models toArray];
+        }];
         [array enumerateObjectsUsingBlock:^(NSDictionary *obj, NSUInteger idx, BOOL *stop) {
             NSString *thisViewId = obj[@"id"];
             [self setSubModel:obj in:thisViewId];

doric-iOS/Pod/Classes/Shader/DoricSliderNode.m

@@ -164,8 +164,9 @@ - (NSDictionary *)itemModelAt:(NSUInteger)position {
         return [self subModelOf:viewId];
     } else {
         DoricAsyncResult *result = [self callJSResponse:@"renderBunchedItems", @(index), @(self.batchCount), nil];
-        JSValue *models = [result waitUntilResult];
+        NSArray *array = [result waitUntilResult:^(JSValue *models) {
-        NSArray *array = [models toArray];
+            return [models toArray];
+        }];
         [array enumerateObjectsUsingBlock:^(NSDictionary *obj, NSUInteger idx, BOOL *stop) {
             NSString *thisViewId = obj[@"id"];
             [self setSubModel:obj in:thisViewId];

doric-iOS/Pod/Classes/Util/DoricAsyncResult.h

@@ -24,7 +24,6 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
-
 @interface DoricAsyncResult <R> : NSObject
 @property(nonatomic, strong) void (^resultCallback)(R result);
 @property(nonatomic, strong) void (^exceptionCallback)(NSException *e);
@@ -39,6 +38,9 @@ NS_ASSUME_NONNULL_BEGIN
 - (R)getResult;
 
 - (R)waitUntilResult;
+
+- (id)waitUntilResult:(id (^)(R result))transformer;
+
 @end
 
 NS_ASSUME_NONNULL_END

doric-iOS/Pod/Classes/Util/DoricAsyncResult.m

@@ -89,4 +89,19 @@ - (id)waitUntilResult {
     dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
     return self.result;
 }
+
+
+- (id)waitUntilResult:(id (^)(id result))transformer {
+    if (self.result) {
+        return transformer(self.result);
+    }
+    __block id ret = nil;
+    dispatch_semaphore_t semaphore = dispatch_semaphore_create(0);
+    self.resultCallback = ^(id r) {
+        ret = transformer(r);
+        dispatch_semaphore_signal(semaphore);
+    };
+    dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
+    return ret;
+}
 @end