修复瀑布流卡顿问题

yanglingyu
1 parent efe59af2
Showing 1 changed file with 14 additions and 14 deletions
CNLiveVideoClassifyKit/Classes/SearchView/View/CNCollectionViewLayout.m
@@ -10,6 +10,7 @@
 @interface CNCollectionViewLayout ()
  
 @property (nonatomic, strong)NSMutableDictionary *maxDic;//储存列的长度
+@property (nonatomic, strong)NSMutableArray *attArray;
  
 @end
  
@@ -23,6 +24,18 @@
 }
 - (void)prepareLayout{
     [super prepareLayout];
+    for (int i = 0; i < self.colCount; i ++) {
+        NSString *key = [NSString stringWithFormat:@"%d",i];
+        self.maxDic[key] = @0;
+    }
+    self.attArray = [[NSMutableArray alloc] init];
+    int count = (int)[self.collectionView numberOfItemsInSection:0];
+    
+    for (int i = 0 ; i < count ; i ++) {
+        UICollectionViewLayoutAttributes *att = [self layoutAttributesForItemAtIndexPath:[NSIndexPath indexPathForItem:i inSection:0]];
+        [self.attArray addObject:att];
+    }
+    
 }
 /**
  * 决定collectionview能滑动的范围
@@ -42,20 +55,7 @@
  *  布局layout
  */
 - (nullable NSArray<__kindof UICollectionViewLayoutAttributes *> *)layoutAttributesForElementsInRect:(CGRect)rect{
-    for (int i = 0; i < self.colCount; i ++) {
-        NSString *key = [NSString stringWithFormat:@"%d",i];
-        self.maxDic[key] = @0;
-    }
-    
-    NSMutableArray *arr = [NSMutableArray array];
-    int count = (int)[self.collectionView numberOfItemsInSection:0];
-    
-    for (int i = 0 ; i < count ; i ++) {
-        UICollectionViewLayoutAttributes *att = [self layoutAttributesForItemAtIndexPath:[NSIndexPath indexPathForItem:i inSection:0]];
-        [arr addObject:att];
-    }
-    
-    return arr;
+    return self.attArray;
 }
 /**
     决定了每个item的位置，大小