StageView 逻辑调整：兼容最小化进房或者房间模式切换

xplan-ios/Main/RTC/RtcManager.m

@@ -16,6 +16,11 @@
 @property (nonatomic, strong) id<RtcInterface> engine;
 @property (nonatomic, weak) id<RtcDelegate> engineDelegate;
 @property (nonatomic, assign) RtcEngineType engineType;
+/**
+ * 当前 Rtc 所在的房间 roomUid 。
+ */
+@property(nonatomic, strong) NSString * enterdRoomUid;
+
 @end
 
 @implementation RtcManager
@@ -47,16 +52,24 @@
 }
 
 - (BOOL)enterRoom:(NSString *)roomUid {
+    if (self.enterdRoomUid && [self.enterdRoomUid isEqualToString:roomUid]) {
+        return YES;
+    }
     return [self.engine joinChannel:roomUid completion:^{
         [self muteRemote:NO];
         [self muteLocal:NO];
+        self.enterdRoomUid = roomUid;
     }];
 }
 
 - (BOOL)enterRoom:(NSString *)roomUid trtcSign:(nonnull NSString *)sign {
+    if (self.enterdRoomUid && [self.enterdRoomUid isEqualToString:roomUid]) {
+        return YES;
+    }
     return [self.engine joinChannel:roomUid sign:sign completion:^{
         [self muteRemote:NO];
         [self muteLocal:NO];
+        self.enterdRoomUid = roomUid;
     }];
 }
 
@@ -79,6 +92,7 @@
     [self.engine exitChannel:^{
         [self muteRemote:NO];
         [self muteLocal:NO];
+        self.enterdRoomUid = nil;
     }];
 }
 
@@ -109,6 +123,7 @@
         [_engine exitChannel:nil];
         [_engine destory];
         _engine = nil;
+        _enterdRoomUid = nil;
     }
     _engineType = type;
 }