iOS: fix multi context,share same zone storage

doric-iOS/Pod/Classes/DoricSingleton.h

@@ -34,6 +34,7 @@
 @property(nonatomic, strong) DoricJSLoaderManager *jsLoaderManager;
 @property(nonatomic, strong) DoricNativeDriver *nativeDriver;
 @property(nonatomic, strong) DoricContextManager *contextManager;
+@property(nonatomic, strong) NSMapTable<NSString *, id> *storageCaches;
 
 + (instancetype)instance;
 

doric-iOS/Pod/Classes/DoricSingleton.m

@@ -34,6 +34,9 @@ - (instancetype)init {
         _enableRecordSnapshot = NO;
         _jsLoaderManager = [DoricJSLoaderManager new];
         _contextManager = [DoricContextManager new];
+        _storageCaches = [[NSMapTable alloc] initWithKeyOptions:NSPointerFunctionsCopyIn
+                                                   valueOptions:NSPointerFunctionsWeakMemory
+                                                       capacity:0];
     }
     return self;
 }

doric-iOS/Pod/Classes/Plugin/DoricStoragePlugin.m

@@ -19,6 +19,7 @@
 
 #import "DoricStoragePlugin.h"
 #import "DoricExtensions.h"
+#import "DoricSingleton.h"
 
 #if __has_include(<PINCache/PINCache.h>)
 
@@ -183,9 +184,13 @@ - (DoricCache *)getDiskCache:(NSString *)zone {
     DoricCache *diskCache;
     if (zone) {
         diskCache = self.cachedMap[zone];
+        if (!diskCache) {
+            diskCache = [DoricSingleton.instance.storageCaches objectForKey:zone];
             if (!diskCache) {
                 diskCache = [[DoricCache alloc] initWithName:[NSString stringWithFormat:@"%@_%@", doric_prefix, zone]
                                                     rootPath:self.basePath];
+                [DoricSingleton.instance.storageCaches setObject:diskCache forKey:zone];
+            }
             self.cachedMap[zone] = diskCache;
         }
     } else {