* [ios] moduleEvent support variable value

Author: acton393

ios/sdk/WeexSDK/Sources/Bridge/WXModuleMethod.m

@@ -48,15 +48,15 @@ - (NSInvocation *)invoke
     }
     if (![moduleInstance respondsToSelector:selector] && [self.methodName isEqualToString:@"addEventListener"]) {
         if([self.arguments[0] isKindOfClass:[NSString class]] && [self.arguments count] == 3) {
-            [self.instance addModuleEventObservers:self.arguments[0] callback:self.arguments[1] option:self.arguments[2] moduleClassName:NSStringFromClass(moduleClass)];
-            return nil;
+            [self.instance _addModuleEventObserversWithArguments:self.arguments moduleClassName:NSStringFromClass(moduleClass)];
         }
+        return nil;
     }
     if (![moduleInstance respondsToSelector:selector] && [self.methodName isEqualToString:@"removeAllEventListeners"]) {
         if ([self.arguments count] &&[self.arguments[0] isKindOfClass:[NSString class]]) {
             [self.instance removeModuleEventObserver:self.arguments[0] moduleClassName:_moduleName];
-            return nil;
         }
+        return nil;
     }
 
     NSInvocation *invocation = [self invocationWithTarget:moduleInstance selector:selector];

ios/sdk/WeexSDK/Sources/Model/WXSDKInstance.m

@@ -395,6 +395,19 @@ - (BOOL)checkModuleEventRegistered:(NSString*)event moduleClassName:(NSString*)m
 
 #pragma mark Private Methods
 
+- (void)_addModuleEventObserversWithArguments:(NSArray*)arguments moduleClassName:(NSString*)moduleClassName
+{
+    if ([arguments count] < 2) {
+        WXLogError(@"please check your method parameter!!");
+        return;
+    }
+    NSMutableArray * methodArguments = [arguments mutableCopy];
+    if ([arguments count] == 2) {
+        [methodArguments addObject:@{@"once": @false}];
+    }
+    [self addModuleEventObservers:methodArguments[0] callback:methodArguments[1] option:methodArguments[2] moduleClassName:moduleClassName];
+}
+
 - (void)addModuleEventObservers:(NSString*)event callback:(NSString*)callbackId option:(NSDictionary *)option moduleClassName:(NSString*)moduleClassName
 {
     BOOL once = [[option objectForKey:@"once"] boolValue];

ios/sdk/WeexSDK/Sources/Model/WXSDKInstance_private.h

@@ -22,6 +22,7 @@
 @property (nonatomic, readonly, strong) WXComponentManager *componentManager;
 
 - (void)addModuleEventObservers:(NSString*)event callback:(NSString*)callbackId option:(NSDictionary*)option moduleClassName:(NSString*)moduleClassName;
+- (void)_addModuleEventObserversWithArguments:(NSArray*)arguments moduleClassName:(NSString*)moduleClassName;
 - (void)removeModuleEventObserver:(NSString*)event moduleClassName:(NSString*)moduleClassName;
 
 @end