4

CustomKeyboard/View/KBKeyButton.m

@@ -26,11 +26,31 @@
     self.layer.shadowOpacity = 1.0;
     self.layer.shadowOffset = CGSizeMake(0, 1);
     self.layer.shadowRadius = 1.5;
+    [self refreshStateAppearance];
 }
 
 - (void)setHighlighted:(BOOL)highlighted {
     [super setHighlighted:highlighted];
-    self.alpha = highlighted ? 0.7 : 1.0; // 简单按压反馈
+    // 简单按压反馈：选中态不改变透明度，避免和高亮态冲突
+    if (self.isSelected) {
+        self.alpha = 1.0;
+    } else {
+        self.alpha = highlighted ? 0.7 : 1.0;
+    }
+}
+
+- (void)setSelected:(BOOL)selected {
+    [super setSelected:selected];
+    [self refreshStateAppearance];
+}
+
+- (void)refreshStateAppearance {
+    // 选中态用于 Shift/CapsLock 等特殊按键的高亮显示
+    if (self.isSelected) {
+        self.backgroundColor = [UIColor colorWithWhite:0.85 alpha:1.0];
+    } else {
+        self.backgroundColor = [UIColor whiteColor];
+    }
 }
 
 @end