swipe to only one item

WenchaoD · Apr 30, 2018 · e4f57fd · e4f57fd
1 parent f9c1774
commit e4f57fd
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/Sources/FSPageViewLayout.swift b/Sources/FSPageViewLayout.swift
@@ -168,6 +168,14 @@ class FSPagerViewLayout: UICollectionViewLayout {
                     offset += self.itemSpacing * (velocity.x)/abs(velocity.x)
                 }
             }
+
+            let targetIndex = Int(offset/self.itemSpacing)
+            let originalIndex = Int(round(originalContentOffsetX/self.itemSpacing))
+            if targetIndex < originalIndex - 1 {
+                offset = CGFloat(originalIndex - 1)*self.itemSpacing
+            } else if targetIndex > originalIndex + 1 {
+                offset = CGFloat(originalIndex + 1)*self.itemSpacing
+            }
             return offset
         }()
         let proposedContentOffsetY: CGFloat = {