debug: Negative sizes are not supported in the flow layout

Author: linhay

SectionKit2.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
     s.name             = 'SectionKit2'
-    s.version          = '2.0.17'
+    s.version          = '2.0.18'
     s.summary          = '动态表单框架'
     s.homepage         = "https://github.com/linhay/SectionKit"
     s.license          = { :type => 'Apache', :file => 'LICENSE' }

SectionUI.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
     s.name             = 'SectionUI'
-    s.version          = '2.0.17'
+    s.version          = '2.0.18'
     s.summary          = '动态表单框架'
     s.homepage         = "https://github.com/linhay/SectionKit"
     s.license          = { :type => 'Apache', :file => 'LICENSE' }
@@ -11,7 +11,7 @@ Pod::Spec.new do |s|
 
     s.platform = :ios
     s.ios.deployment_target = "13.0"
-    s.dependency 'SectionKit2', '>= 2.0.17'
+    s.dependency 'SectionKit2', '>= 2.0.18'
 
     s.source_files = ["Sources/SectionUI/**/*.{swift,h}"]
 end  

Sources/SectionKit/CollectionBaseProtocol/SKCViewDelegateFlowLayout.swift

@@ -28,12 +28,21 @@ class SKCViewDelegateFlowLayout: SKCDelegate, UICollectionViewDelegateFlowLayout
         guard let section = self.section(indexPath) else {
             return .zero
         }
-        let size = section.itemSize(at: indexPath.item)
-        if indexPath.section == 0, indexPath.row == 0, size == .zero {
-            return .init(width: 0.01, height: 0.01)
-        } else {
-            return size
+        
+        var size = section.itemSize(at: indexPath.item)
+        
+        if size.width < 0 || size.height < 0 {
+            assertionFailure("Negative sizes are not supported in the flow layout, \(section)")
+            size = .init(width: max(size.width, 0), height: max(size.height, 0))
         }
+        
+        if indexPath.section == 0,
+           indexPath.row == 0,
+           size == .zero {
+            size = .init(width: 0.01, height: 0.01)
+        }
+        
+        return size
     }
 
     func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {