// 计算collecitonView高度

galaxy/galaxy/Classes/Modules/Community(社区)/V/YHInterestTopicLayout.swift

@@ -13,6 +13,7 @@ class YHInterestTopicLayout: UICollectionViewFlowLayout {
     var dataSource:[String] = []
     weak var layoutDelegate: UICollectionViewDelegateFlowLayout? = nil
     var interItemSpacing: CGFloat = 12.0 // 相邻单元格之间的水平间距
+    let collectionViewWidth = KScreenWidth-16.0*4
     override func prepare() {
         super.prepare()
         self.minimumInteritemSpacing = 12
@@ -35,7 +36,7 @@ class YHInterestTopicLayout: UICollectionViewFlowLayout {
                 let originX = prevLayout.frame.maxX
                 //如果当 （上一个cell的最右边X + 我们想要的间距 + 当前cell的宽度 + 区边距） 依然在contentSize中 (小于屏幕宽度)，我们改变当前cell的原点位置
                 //判断 当前cell的 maxX 是否超出屏幕
-                if((CGFloat(originX) + CGFloat(maximumSpacing) + currentLayout.frame.size.width) + self.sectionInset.right < self.collectionViewContentSize.width)  {
+                if((CGFloat(originX) + CGFloat(maximumSpacing) + currentLayout.frame.size.width) + self.sectionInset.right < self.collectionViewWidth)  {
                     var frame = currentLayout.frame
                     frame.origin.x = CGFloat(originX) + CGFloat(maximumSpacing)
                     currentLayout.frame = frame
@@ -53,9 +54,8 @@ class YHInterestTopicLayout: UICollectionViewFlowLayout {
     
     override var collectionViewContentSize: CGSize {
         get {
-            let width = self.collectionView?.width ?? 0.0
             let height = self.calculateHeight()
-            return CGSize(width: width, height: height)
+            return CGSize(width: self.collectionViewWidth, height: height)
         }
     }
     
@@ -79,13 +79,14 @@ class YHInterestTopicLayout: UICollectionViewFlowLayout {
                     height = itemHeight
                 } else {
                     let targetX = currentX + self.minimumInteritemSpacing + size.width
-                    if targetX <= self.collectionView!.width {
+                    if targetX <= self.collectionViewWidth {
                         currentX = targetX
                     } else {
-                        currentX = 0
+                        currentX = size.width
                         height += self.minimumLineSpacing + itemHeight
                     }
                 }
+                printLog("calcaulte: \(height)")
             }
         }
         return height

galaxy/galaxy/Classes/Modules/Community(社区)/V/YHMyInterestTopicCell.swift

@@ -64,26 +64,34 @@ class YHMyInterestTopicCell: UITableViewCell {
             self.collectionView.isHidden = !isShowList
             self.detailLabel.isHidden = isShowList
             
+            self.topicArr.removeAll()
+            if self.userModel.topics.count > 0 {
+                self.topicArr.append(contentsOf: self.userModel.topics)
+            }
+            self.layout.dataSource = self.topicArr
+            self.layout.invalidateLayout()
+            self.collectionView.reloadData()
+
+            let height = self.layout.collectionViewContentSize.height
+            printLog("ABC: \(height)")
+            
             if isShowList {
                 
-                self.topicArr.removeAll()
-                if self.userModel.topics.count > 0 {
-                    self.topicArr.append(contentsOf: self.userModel.topics)
+                self.collectionView.snp.remakeConstraints { make in
+                    make.height.equalTo(height)
+                    make.left.equalTo(16)
+                    make.right.equalTo(-16)
+                    make.bottom.equalTo(-16)
+                    make.top.equalTo(self.titleLabel.snp.bottom).offset(12)
                 }
-                self.layout.dataSource = self.topicArr
-                self.collectionView.reloadData {
-                    let height = self.layout.collectionViewContentSize.height
-                    printLog("ABC: \(height)")
-                    self.collectionView.snp.remakeConstraints { make in
-                        make.height.equalTo(height)
-                        make.left.equalTo(16)
-                        make.right.equalTo(-16)
-                        make.bottom.equalTo(-16)
-                        make.top.equalTo(self.titleLabel.snp.bottom).offset(12)
-                    }
+                self.detailLabel.snp.remakeConstraints { make in
+                    make.left.equalTo(16)
+                    make.right.equalTo(-16)
+                    make.top.equalTo(titleLabel.snp.bottom).offset(12)
                 }
+                self.setNeedsLayout()
+                self.layoutIfNeeded()
                 
-                self.detailLabel.snp.removeConstraints()
                 
             } else {
                 
@@ -93,7 +101,12 @@ class YHMyInterestTopicCell: UITableViewCell {
                     make.bottom.equalTo(-16)
                     make.top.equalTo(titleLabel.snp.bottom).offset(12)
                 }
-                self.collectionView.snp.removeConstraints()
+                self.collectionView.snp.remakeConstraints { make in
+                    make.height.equalTo(height)
+                    make.left.equalTo(16)
+                    make.right.equalTo(-16)
+                    make.top.equalTo(self.titleLabel.snp.bottom).offset(12)
+                }
             }
             self.setNeedsLayout()
             self.layoutIfNeeded()