fix(ios): Changing swipe direction flickers (#330) (#356)

Author: DanijelBojcic

example/ios/Podfile.lock

@@ -185,7 +185,7 @@ PODS:
     - React-cxxreact (= 0.63.4)
     - React-jsi (= 0.63.4)
   - React-jsinspector (0.63.4)
-  - react-native-pager-view (5.1.7):
+  - react-native-pager-view (5.1.8):
     - React-Core
   - react-native-safe-area-context (3.2.0):
     - React-Core
@@ -382,7 +382,7 @@ SPEC CHECKSUMS:
   React-jsi: a0418934cf48f25b485631deb27c64dc40fb4c31
   React-jsiexecutor: 93bd528844ad21dc07aab1c67cb10abae6df6949
   React-jsinspector: 58aef7155bc9a9683f5b60b35eccea8722a4f53a
-  react-native-pager-view: c60a26be051a4b88427f2475e173b5c112e98d17
+  react-native-pager-view: a0b86051cb34c1868601ba65a8133e3b7a2830b5
   react-native-safe-area-context: f0906bf8bc9835ac9a9d3f97e8bde2a997d8da79
   React-RCTActionSheet: 89a0ca9f4a06c1f93c26067af074ccdce0f40336
   React-RCTAnimation: 1bde3ecc0c104c55df246eda516e0deb03c4e49b
@@ -402,4 +402,4 @@ SPEC CHECKSUMS:
 
 PODFILE CHECKSUM: ff595481d97548cf6367f753d945ef2a7fc1f818
 
-COCOAPODS: 1.10.0
+COCOAPODS: 1.10.1

ios/ReactNativePageView.m

@@ -382,19 +382,13 @@ - (void)scrollViewDidScroll:(UIScrollView *)scrollView {
     }
 
     float absoluteOffset = fabs(offset);
-    if(absoluteOffset > 1) {
-        absoluteOffset = 1.0;
-    }
 
-    NSString *scrollDirection = [self determineScrollDirection:scrollView];
-    NSString *oppositeDirection = self.isHorizontal ? @"left" : @"up";
     NSInteger position = self.currentIndex;
-
-    if(absoluteOffset > 0) {
-        position = [scrollDirection  isEqual: oppositeDirection] ? self.currentIndex - 1 : self.currentIndex;
-        absoluteOffset =  [scrollDirection  isEqual: oppositeDirection] ? 1 - absoluteOffset : absoluteOffset;
+    
+    if(offset<0 && position>0){
+        position =  self.currentIndex - 1;
+        absoluteOffset =  1 - absoluteOffset;
     }
-   
 
     self.lastContentOffset = scrollView.contentOffset;
     [self.eventDispatcher sendEvent:[[RCTOnPageScrollEvent alloc] initWithReactTag:self.reactTag position:@(position) offset:@(absoluteOffset)]];