fix(ios): ViewPager onPageScrollStateChange missing

settling/dragging status

examples/hippy-react-demo/src/components/ViewPager/index.jsx

@@ -64,6 +64,7 @@ export default class PagerExample extends React.Component {
     constructor(props) {
       super(props);
       this.onPageSelected = this.onPageSelected.bind(this);
+      this.onPageScrollStateChanged = this.onPageScrollStateChanged.bind(this);
     }
 
     onPageSelected(pageData) {
@@ -106,6 +107,7 @@ export default class PagerExample extends React.Component {
             keyboardDismissMode="none"
             scrollEnabled
             onPageSelected={this.onPageSelected}
+            onPageScrollStateChanged={this.onPageScrollStateChanged}
             onPageScroll={this.onPageScroll}
           >
             {

ios/sdk/component/viewPager/HippyViewPager.m

@@ -163,10 +163,6 @@
 
 #pragma mark scrollview delegate methods
 - (void)scrollViewDidScroll:(UIScrollView *)scrollView {
-    if (self.onPageScrollStateChanged) {
-        NSString *state = scrollView.isDragging ? @"dragging" : @"settling";
-        self.onPageScrollStateChanged(@{ @"pageScrollState": state });
-    }
 
     CGFloat currentContentOffset = self.contentOffset.x;
     CGFloat offset = currentContentOffset - self.previousStopOffset;
@@ -211,6 +207,9 @@
             [scrollViewListener scrollViewWillBeginDragging:scrollView];
         }
     }
+    if (self.onPageScrollStateChanged) {
+        self.onPageScrollStateChanged(@{ @"pageScrollState": @"dragging" });
+    }
 }
 
 - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset {
@@ -233,6 +232,10 @@
     if (!decelerate) {
         self.isScrolling = NO;
     }
+    if (self.onPageScrollStateChanged) {
+        NSString *state = decelerate ? @"settling" : @"idle";
+        self.onPageScrollStateChanged(@{ @"pageScrollState": state });
+    }
 }
 
 - (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView {