提供获取页面栈页面个数的接口

ios/Classes/Boost/FLBFlutterApplicationInterface.h

@@ -45,6 +45,7 @@ NS_ASSUME_NONNULL_BEGIN
 - (void)addUniqueViewController:(id<FLBFlutterContainer>)vc;
 - (void)removeViewController:(id<FLBFlutterContainer>)vc;
 - (BOOL)isTop:(NSString *)pageId;
+- (NSInteger)pageCount;
 
 #pragma mark - App Control
 - (void)pause;

ios/Classes/Boost/FLBFlutterContainerManager.h

@@ -32,6 +32,7 @@ NS_ASSUME_NONNULL_BEGIN
 - (void)addUnique:(id<FLBFlutterContainer>)vc;
 - (void)remove:(id<FLBFlutterContainer>)vc;
 - (BOOL)contains:(id<FLBFlutterContainer>)vc;
+- (NSInteger)pageCount;
 
 @end
 NS_ASSUME_NONNULL_END

ios/Classes/Boost/FLBFlutterContainerManager.m

@@ -79,6 +79,10 @@
     return _idStk.lastObject;
 }
 
+- (NSInteger)pageCount{
+    return _idStk.count;
+}
+
 #if DEBUG
 - (void)dump:(NSString*)flag{
     NSMutableString *log = [[NSMutableString alloc]initWithFormat:@"[DEBUG]--%@--PageStack uid/name", flag];

ios/Classes/Boost/FlutterBoostPlugin.h

@@ -31,6 +31,12 @@ NS_ASSUME_NONNULL_BEGIN
 #pragma mark - Initializer
 + (instancetype)sharedInstance;
 
+/**
+ * 获取当前管理的页面栈中页面的个数
+ *
+ */
++ (NSInteger)pageCount;
+
 /**
  * 初始化FlutterBoost混合栈环境。应在程序使用混合栈之前调用。如在AppDelegate中
  *

ios/Classes/Boost/FlutterBoostPlugin.m

@@ -111,6 +111,11 @@
     return _instance;
 }
 
++ (NSInteger)pageCount{
+    id<FLBFlutterApplicationInterface> app = [[FlutterBoostPlugin sharedInstance] application];
+    return [app pageCount];
+}
+
 - (void)startFlutterWithPlatform:(id<FLBPlatform>)platform
                          onStart:(void (^)(FlutterEngine *engine))callback;
 {

ios/Classes/Engine/FLBFlutterApplication.m

@@ -116,6 +116,9 @@
     return [_manager remove:vc];
 }
 
+- (NSInteger)pageCount{
+    return [_manager pageCount];
+}
 
 - (BOOL)isTop:(NSString *)pageId
 {

ios/Classes/container/FLBFlutterViewContainer.h

@@ -31,6 +31,5 @@ NS_ASSUME_NONNULL_BEGIN
 @property (nonatomic,copy,readwrite) NSString *name;
 - (instancetype)init NS_DESIGNATED_INITIALIZER;
 - (void)surfaceUpdated:(BOOL)appeared;
-- (void)setEnableForRunnersBatch:(BOOL)enable;
 @end
 NS_ASSUME_NONNULL_END

ios/Classes/container/FLBFlutterViewContainer.m

@@ -158,11 +158,6 @@ static NSUInteger kInstanceCounter = 0;
     [FLUTTER_APP.flutterProvider detach];
 }
 
-- (void)setEnableForRunnersBatch:(BOOL)enable{
-    //dummy function
-    NSLog(@"[DEBUG]- I did nothing, I am innocent");
-}
-
 #pragma mark - Life circle methods
 
 - (void)viewDidLayoutSubviews