处理按钮之间点不到的问题 HitInside

CustomKeyboard/View/KBKeyboardView.m

@@ -135,27 +135,42 @@ static const CGFloat kKBLettersRow2EdgeSpacerMultiplier = 0.5;
     if ([hit isKindOfClass:[KBKeyButton class]]) {
         return hit;
     }
-    if (hit == self || hit == self.row1 || hit == self.row2 || hit == self.row3 || hit == self.row4) {
+    if ([self kb_isHitInsideKeyRows:hit]) {
         KBKeyButton *btn = [self kb_nearestKeyButtonForPoint:point];
         if (btn) { return btn; }
     }
     return hit;
 }
 
+- (BOOL)kb_isHitInsideKeyRows:(UIView *)hitView {
+    if (!hitView) { return NO; }
+    if (hitView == self) { return YES; }
+    if ([hitView isDescendantOfView:self.row1]) { return YES; }
+    if ([hitView isDescendantOfView:self.row2]) { return YES; }
+    if ([hitView isDescendantOfView:self.row3]) { return YES; }
+    if ([hitView isDescendantOfView:self.row4]) { return YES; }
+    return NO;
+}
+
 - (KBKeyButton *)kb_nearestKeyButtonForPoint:(CGPoint)point {
-    // 扩大按键的可点击区域，优先响应间隙点击（贴近系统键盘手感）。
-    CGFloat slopX = KBFit(8.0f);
-    CGFloat slopY = KBFit(4.0f);
     KBKeyButton *best = nil;
     CGFloat bestDistance = CGFLOAT_MAX;
     NSArray<UIView *> *rows = @[self.row1, self.row2, self.row3, self.row4];
+
+    UIView *targetRow = nil;
     for (UIView *row in rows) {
-        for (UIView *view in row.subviews) {
-            if (![view isKindOfClass:[KBKeyButton class]]) { continue; }
-            KBKeyButton *btn = (KBKeyButton *)view;
-            CGRect frame = [self convertRect:btn.frame fromView:row];
-            CGRect hitFrame = CGRectInset(frame, -slopX, -slopY);
-            if (!CGRectContainsPoint(hitFrame, point)) { continue; }
+        CGRect rowFrame = [self convertRect:row.bounds fromView:row];
+        if (CGRectContainsPoint(rowFrame, point)) {
+            targetRow = row;
+            break;
+        }
+    }
+
+    NSArray<UIView *> *candidateRows = targetRow ? @[targetRow] : rows;
+    for (UIView *row in candidateRows) {
+        NSArray<KBKeyButton *> *buttons = [self kb_collectKeyButtonsInView:row];
+        for (KBKeyButton *btn in buttons) {
+            CGRect frame = [self convertRect:btn.frame fromView:btn.superview];
             CGFloat dx = point.x - CGRectGetMidX(frame);
             CGFloat dy = point.y - CGRectGetMidY(frame);
             CGFloat dist = (dx * dx) + (dy * dy);
@@ -168,6 +183,26 @@ static const CGFloat kKBLettersRow2EdgeSpacerMultiplier = 0.5;
     return best;
 }
 
+- (NSArray<KBKeyButton *> *)kb_collectKeyButtonsInView:(UIView *)view {
+    if (!view) { return @[]; }
+    NSMutableArray<KBKeyButton *> *buttons = [NSMutableArray array];
+    [self kb_collectKeyButtonsInView:view into:buttons];
+    return buttons.copy;
+}
+
+- (void)kb_collectKeyButtonsInView:(UIView *)view
+                              into:(NSMutableArray<KBKeyButton *> *)buttons {
+    for (UIView *sub in view.subviews) {
+        if ([sub isKindOfClass:[KBKeyButton class]]) {
+            [buttons addObject:(KBKeyButton *)sub];
+            continue;
+        }
+        if (sub.subviews.count > 0) {
+            [self kb_collectKeyButtonsInView:sub into:buttons];
+        }
+    }
+}
+
 #pragma mark - Key Model Construction
 
 // 创建当前布局下各行的 KBKey 列表