处理聊天UI细节问题

Visual_Novel_iOS/Assets.xcassets/Role/role_chat_bg_response.imageset/Contents.json

@@ -0,0 +1,22 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "role_chat_response@2x.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "role_chat_response@3x.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Visual_Novel_iOS/Assets.xcassets/Role/role_chat_bg_send.imageset/Contents.json

@@ -0,0 +1,22 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "role_chat_send@2x.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "role_chat_send@3x.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Visual_Novel_iOS/Src/Modules/Chat/Session/View/StreamChatBubbleCell.swift

@@ -7,6 +7,37 @@ final class StreamChatBubbleCell: UITableViewCell {
     private let bubbleView = UIView()
     private let messageLabel = UILabel()
     var onLongPress: (() -> Void)?
+    
+    lazy var sendBgImgView: UIImageView = {
+        guard let originalImage = UIImage(named: "role_chat_bg_send") else {
+            return UIImageView()
+        }
+        // 发送消息：尖尖在右上角，focus 点应该在右上角附近
+        // 假设图片尺寸，focus 点设置为右上角区域（距离右边和顶部一定距离）
+        let imageSize = originalImage.size
+        let focusX = imageSize.width - 20.0  // 距离右边 20pt
+        let focusY = 20.0  // 距离顶部 20pt
+        let stretchedImage = originalImage.makeStretchable(from: originalImage, focus: CGPoint(x: focusX, y: focusY))
+        let imgV = UIImageView(image: stretchedImage)
+        imgV.contentMode = .scaleToFill
+        return imgV
+    }()
+    
+    lazy var respBgImgView: UIImageView = {
+        guard let originalImage = UIImage(named: "role_chat_bg_response") else {
+            return UIImageView()
+        }
+        // 接收消息：尖尖在左上角，focus 点应该在左上角附近
+        // focus 点设置为左上角区域（距离左边和顶部一定距离）
+        let imageSize = originalImage.size
+        let focusX = 20.0  // 距离左边 20pt
+        let focusY = 20.0  // 距离顶部 20pt
+        let stretchedImage = originalImage.makeStretchable(from: originalImage, focus: CGPoint(x: focusX, y: focusY))
+        let imgV = UIImageView(image: stretchedImage)
+        imgV.contentMode = .scaleToFill
+        return imgV
+    }()
+    
     private lazy var longPressGesture: UILongPressGestureRecognizer = {
         let gesture = UILongPressGestureRecognizer(target: self, action: #selector(handleLongPress(_:)))
         gesture.minimumPressDuration = 0.4
@@ -34,8 +65,8 @@ final class StreamChatBubbleCell: UITableViewCell {
     
     private func setupViews() {
         contentView.addSubview(bubbleView)
-        bubbleView.layer.cornerRadius = 18
-        bubbleView.layer.masksToBounds = true
+        bubbleView.addSubview(sendBgImgView)
+        bubbleView.addSubview(respBgImgView)
         bubbleView.setContentHuggingPriority(.defaultLow, for: .horizontal)
         bubbleView.setContentCompressionResistancePriority(.defaultHigh, for: .horizontal)
         contentView.addGestureRecognizer(longPressGesture)
@@ -52,20 +83,30 @@ final class StreamChatBubbleCell: UITableViewCell {
     
     func configure(message: StreamChatMessageModel) {
         messageLabel.text = message.text
+        respBgImgView.isHidden = message.isSelf
+        sendBgImgView.isHidden = !message.isSelf
         
         if message.isSelf {
-            bubbleView.backgroundColor = UIColor.c.cpn
+            // 发送消息：深色背景，尖尖在右上角
             messageLabel.textColor = .white
+            bubbleView.backgroundColor = .clear
+            
             bubbleView.snp.remakeConstraints { make in
                 make.top.equalToSuperview().offset(6)
                 make.bottom.equalToSuperview().offset(-6)
                 make.width.lessThanOrEqualTo(UIScreen.width * 2.0 / 3.0)
-                make.width.greaterThanOrEqualTo(60)
+                make.width.greaterThanOrEqualTo(40)
                 make.trailing.equalToSuperview().offset(-16)
             }
+            
+            sendBgImgView.snp.remakeConstraints { make in
+                make.edges.equalToSuperview()
+            }
         } else {
-            bubbleView.backgroundColor = UIColor.white.withAlphaComponent(0.2)
-            messageLabel.textColor = .white
+            // 接收消息：浅色背景，尖尖在左上角
+            messageLabel.textColor = UIColor(hex: "#333333")
+            bubbleView.backgroundColor = .clear
+            
             bubbleView.snp.remakeConstraints { make in
                 make.top.equalToSuperview().offset(6)
                 make.bottom.equalToSuperview().offset(-6)
@@ -73,6 +114,10 @@ final class StreamChatBubbleCell: UITableViewCell {
                 make.width.greaterThanOrEqualTo(60)
                 make.leading.equalToSuperview().offset(16)
             }
+            
+            respBgImgView.snp.remakeConstraints { make in
+                make.edges.equalToSuperview()
+            }
         }
         
         messageLabel.snp.remakeConstraints { make in

Visual_Novel_iOS/Src/Utils/Extensions/UIImageExt.swift

@@ -460,6 +460,33 @@ public extension UIImage {
     func pngBase64String() -> String? {
         return pngData()?.base64EncodedString()
     }
+    
+    /// 根据“焦点”生成四周可拉伸、四角不变的 UIImage
+    /// 返回的图 *本身* 就是 resizable，尺寸由外部 Auto Layout 决定
+    func makeStretchable(from image: UIImage,
+                         focus: CGPoint) -> UIImage {
+        
+        let scale = image.scale
+        let w = image.size.width  * scale
+        let h = image.size.height * scale
+        let fx = focus.x * scale
+        let fy = focus.y * scale
+        
+        // 保护四角：以焦点为中心对称留 cap
+        let capLeft   = min(fx, w - fx) * 0.5
+        let capRight  = w - capLeft
+        let capTop    = min(fy, h - fy) * 0.5
+        let capBottom = h - capTop
+        
+        let insets = UIEdgeInsets(top: capTop,
+                                  left: capLeft,
+                                  bottom: capBottom,
+                                  right: capRight)
+        
+        // 只生成可拉伸图，不立即渲染固定尺寸
+        return image.resizableImage(withCapInsets: insets,
+                                    resizingMode: .stretch)
+    }
 
     /// Base 64 encoded JPEG data of the image.
     ///