增加换肤功能

QXLive/Third/ZLCollectionViewFlowLayout/ZLCollectionViewLayoutAttributes.m

@@ -0,0 +1,30 @@
+//
+//  ZLCollectionViewLayoutAttributes.m
+//  ZLCollectionView
+//
+//  Created by zhaoliang chen on 2018/7/9.
+//  Copyright © 2018年 zhaoliang chen. All rights reserved.
+//
+
+#import "ZLCollectionViewLayoutAttributes.h"
+#import "ZLCollectionReusableView.h"
+
+@implementation ZLCollectionViewLayoutAttributes
+@synthesize orginalFrame = _orginalFrame;
+
++ (instancetype)layoutAttributesForDecorationViewOfKind:(NSString *)decorationViewKind withIndexPath:(NSIndexPath *)indexPath orginalFrmae:(CGRect)orginalFrame{
+    ZLCollectionViewLayoutAttributes *layoutAttributes = [super layoutAttributesForDecorationViewOfKind:decorationViewKind withIndexPath:indexPath];
+    [layoutAttributes setValue:[NSValue valueWithCGRect:orginalFrame] forKey:@"orginalFrame"];
+    layoutAttributes.frame = orginalFrame;
+    return layoutAttributes;
+}
+
+-(CGRect)orginalFrame {
+    if ([self.representedElementKind isEqualToString:UICollectionElementKindSectionHeader]) {
+        return _orginalFrame;
+    } else {
+        return self.frame;
+    }
+}
+
+@end