role聊天快捷滚动到底部

Visual_Novel_iOS/Src/Modules/Chat/Session/SessionController+Adapter.swift

@@ -88,6 +88,7 @@ extension SessionController {
         
         DispatchQueue.main.async {[weak self] in
             self?.scrollToBottom(self?.tableView)
+            self?.updateScrToBottomButtonVisibility()
         }
     }
     
@@ -99,7 +100,7 @@ extension SessionController {
         let delaySeconds = delay ?? 0
 //        let y = max(table.contentSize.height - table.bounds.size.height, 0)
 //        table.setContentOffset(CGPoint(x: 0, y: y), animated: animated)
-        DispatchQueue.main.asyncAfter(deadline: .now() + delaySeconds) {[weak self] in
+            DispatchQueue.main.asyncAfter(deadline: .now() + delaySeconds) {[weak self] in
             if self?.isStreamChatMode == true {
                 let count = self?.streamMessages.count ?? 0
                 if count > 0 {
@@ -111,6 +112,10 @@ extension SessionController {
                     table.scrollToRow(at: IndexPath(row: count - 1, section: 1), at: .bottom, animated: animated)
                 }
             }
+            // 滚动完成后更新按钮状态
+            DispatchQueue.main.asyncAfter(deadline: .now() + (animated ? 0.3 : 0.1)) {
+                self?.updateScrToBottomButtonVisibility()
+            }
             // Initial state
             DispatchQueue.main.asyncAfter(deadline: .now() + 0.25) {
                 if table.alpha == 0{
@@ -295,7 +300,7 @@ extension SessionController: UITableViewDelegate {
     func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {}
     
     func scrollViewDidScroll(_ scrollView: UIScrollView) {
-        //...
+        updateScrToBottomButtonVisibility()
     }
     
     func scrollViewDidEndDragging(_ scrollView: UIScrollView, willDecelerate decelerate: Bool) {
@@ -350,6 +355,48 @@ extension SessionController: UITableViewDelegate {
         UIPasteboard.general.string = text
         Hud.toast(str: "复制成功")
     }
+    
+    /// 更新滚动到底部按钮的显示/隐藏状态
+    func updateScrToBottomButtonVisibility() {
+        guard let tableView = tableView, let scrToBottomBtn = scrToBottomBtn else { return }
+        
+        // 判断是否有内容
+        let hasContent: Bool
+        if isStreamChatMode {
+            hasContent = streamMessages.count > 0
+        } else {
+            hasContent = util.cellModels.count > 0
+        }
+        
+        guard hasContent else {
+            scrToBottomBtn.isHidden = true
+            return
+        }
+        
+        // 判断是否可以往下滑动
+        let contentHeight = tableView.contentSize.height
+        let tableViewHeight = tableView.bounds.height
+        let offsetY = tableView.contentOffset.y
+        let contentInsetTop = tableView.contentInset.top
+        let contentInsetBottom = tableView.contentInset.bottom
+        
+        // 计算实际内容高度（减去 inset）
+        let actualContentHeight = contentHeight - contentInsetTop - contentInsetBottom
+        let actualTableViewHeight = tableViewHeight - contentInsetTop - contentInsetBottom
+        
+        // 如果内容高度小于等于 tableView 高度，说明不能滚动，隐藏按钮
+        guard actualContentHeight > actualTableViewHeight else {
+            scrToBottomBtn.isHidden = true
+            return
+        }
+        
+        // 计算距离底部的距离
+        let distanceFromBottom = actualContentHeight - (offsetY - contentInsetTop) - actualTableViewHeight
+        
+        // 如果距离底部小于等于 50pt，说明已经接近底部，隐藏按钮
+        // 否则显示按钮
+        scrToBottomBtn.isHidden = distanceFromBottom <= 50
+    }
 }
 
 

Visual_Novel_iOS/Src/Modules/Chat/Session/SessionController+Input.swift

@@ -51,6 +51,10 @@ extension SessionController {
             let scrToBottomBtn = UIButton(type: .custom)
             scrToBottomBtn.setImage(UIImage(named: "chat_scr_bottom"), for: .normal)
             scrToBottomBtn.addTarget(self, action: #selector(scrToBottomBtnTap), for: .touchUpInside)
+            scrToBottomBtn.isHidden = true // 默认隐藏
+            
+            // 保存按钮引用
+            self.scrToBottomBtn = scrToBottomBtn
             
             let stackView = UIStackView(arrangedSubviews: [scrToBottomBtn, exchangeBtn])
             stackView.spacing = 10.0

Visual_Novel_iOS/Src/Modules/Chat/Session/SessionController.swift

@@ -31,6 +31,7 @@ class SessionController: CLBaseViewController {
     // MARK: BottomViews
     var bottomViewsStackV : InputStackView!
     var toolView: UIView!
+    var scrToBottomBtn: UIButton!
     var inputEntrance: SessionInputOperateView!
     var inputBar: SessionInputView!
     var moreView: IMMoreItemView!
@@ -251,7 +252,7 @@ extension SessionController {
             }
             return v
         }()
-        // bgImageView.image = UIImage(named: "egpic")?.cropImageTop(with: 1 / UIScreen.aspectRatio)
+         bgImageView.image = UIImage(named: "egpic")?.cropImageTop(with: 1 / UIScreen.aspectRatio)
 
         overlay = {
             let v = GradientView(colors: [UIColor.c.cbn.withAlphaComponent(1), UIColor.c.cbn.withAlphaComponent(0), UIColor.c.cbn.withAlphaComponent(0), UIColor.c.cbn.withAlphaComponent(1)], gradientType: .topToBottom)
@@ -274,7 +275,8 @@ extension SessionController {
         swipeBgView = {
             let bgView = UIView()
             bgView.alpha = 0.0
-            bgView.backgroundColor = UIColor.init(white: 0.0, alpha: 0.8)
+//            bgView.backgroundColor = UIColor.init(white: 0.0, alpha: 0.8)
+            bgView.backgroundColor = .clear
             view.addSubview(bgView)
             bgView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(bgViewTap)))
             bgView.snp.makeConstraints { make in
@@ -655,6 +657,7 @@ extension SessionController {
             
             self.startDisplayLinkIfNeeded()
             self.smoothScrollToLatest()
+            self.updateScrToBottomButtonVisibility()
         }
     }
     
@@ -672,6 +675,7 @@ extension SessionController {
             tableView.endUpdates()
         }
         smoothScrollToLatest()
+        updateScrToBottomButtonVisibility()
     }
     
     private func finalizeStreamingMessage() {
@@ -695,6 +699,7 @@ extension SessionController {
                 self.startDisplayLinkIfNeeded()
             }
             
+            self.updateScrToBottomButtonVisibility()
             IMSSEManager.shared.disconnect()
         }
     }
@@ -835,6 +840,7 @@ extension SessionController {
                 tableView.endUpdates()
             }
             smoothScrollToLatest()
+            updateScrToBottomButtonVisibility()
         }
         cleanupTypingState()
     }

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

@@ -174,7 +174,7 @@ class SessionNavigationView: UIView {
             make.leading.equalToSuperview()
             make.trailing.equalToSuperview()
             make.height.equalTo(UIWindow.navBarTotalHeight)
-            make.bottom.equalToSuperview().offset(-40)
+            make.bottom.equalToSuperview().offset(0)
         }
     }