From 4f23118ec05ee424ed529be7210d035a155d451a Mon Sep 17 00:00:00 2001
From: CodeST <694468528@qq.com>
Date: Thu, 30 Oct 2025 18:28:36 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=94=B9=E9=80=BB=E8=BE=91?=
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---
 CustomKeyboard/View/KBFunctionView.m | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/CustomKeyboard/View/KBFunctionView.m b/CustomKeyboard/View/KBFunctionView.m
index 3faa074..c961b80 100644
--- a/CustomKeyboard/View/KBFunctionView.m
+++ b/CustomKeyboard/View/KBFunctionView.m
@@ -234,29 +234,26 @@ static NSString * const kKBFunctionTagCellId = @"KBFunctionTagCellId";
 }
 - (void)onTapDelete {
     NSLog(@"点击：删除");
-    // 单次删除一个字符（从宿主 App 的文本框光标前）
     UIInputViewController *ivc = [self findInputViewController];
     id<UITextDocumentProxy> proxy = ivc.textDocumentProxy;
     [proxy deleteBackward];
 }
 - (void)onTapClear {
     NSLog(@"点击：清空");
-    // 连续删除，直到当前输入位置之前无文本
+    // 连续删除：仅清空光标之前的输入（不改动 pasteView 的内容）
     UIInputViewController *ivc = [self findInputViewController];
     id<UITextDocumentProxy> proxy = ivc.textDocumentProxy;
-    // 为避免极端情况下的长时间阻塞，按块删除
-    NSInteger guard = 0;
-    while (proxy.hasText && guard < 10000) { // 合理的上限保护
+    // 逐批读取 documentContextBeforeInput 并删除，避免 50 字符窗口限制带来的残留
+    NSInteger guard = 0; // 上限保护，避免极端情况下长时间阻塞
+    while (guard < 10000) {
         NSString *before = proxy.documentContextBeforeInput ?: @"";
-        // 优先批量删除当前可见的 before 字符数
-        NSInteger count = before.length > 0 ? before.length : 1;
+        NSInteger count = before.length;
+        if (count <= 0) { break; } // 光标前已无内容
         for (NSInteger i = 0; i < count; i++) {
             [proxy deleteBackward];
         }
         guard += count;
     }
-    // 同步重置功能区里的占位文案
-    self.pasteView.placeholderLabel.text = @"点击粘贴TA的话";
 }
 - (void)onTapSend {
     NSLog(@"点击：发送");