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fix(ios): resolve occasional index OOB when no items in ViewPager (#4208)

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This commit is contained in:
wwwcg
2025-03-05 20:02:29 +08:00
committed by GitHub
parent 26f645da79
commit aa45fc9159
1 changed files with 16 additions and 15 deletions
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renderer/native/ios/renderer/component/viewPager/HippyViewPager.mm
+16 -15
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@@ -430,23 +430,24 @@ static NSString *const HippyPageScrollStateDragging = @"dragging";
- (NSUInteger)targetPageIndexFromTargetContentOffsetX:(CGFloat)targetContentOffsetX {
NSInteger thePage = -1;
if (fabs(targetContentOffsetX) < FLT_EPSILON) {
thePage = 0;
} else {
for (int i = 0; i < self.viewPagerItems.count; i++) {
UIView *pageItem = self.viewPagerItems[i];
CGPoint point = [self middlePointOfView:pageItem];
if (point.x > targetContentOffsetX) {
thePage = i;
break;
}
NSUInteger count = self.viewPagerItems.count;
if (count == 0) {
return 0;
}
for (int i = 0; i < count; i++) {
UIView *pageItem = self.viewPagerItems[i];
CGPoint point = [self middlePointOfView:pageItem];
if (point.x > targetContentOffsetX) {
thePage = i;
break;
}
}
if (thePage == -1) {
thePage = 0;
} else if (thePage >= self.viewPagerItems.count) {
thePage = self.viewPagerItems.count - 1;
}
// Make sure the index is within legal limits
thePage = MIN(MAX(thePage, 0), count - 1);
// Update cache and return result
if (_lastPageIndex != thePage) {
_lastPageIndex = thePage;
_lastSelectedPageItem = self.viewPagerItems[thePage];