处理再次进入弹起权限弹窗

keyBoard/Class/Categories/UIViewController+Extension.h

@@ -10,6 +10,9 @@
 NS_ASSUME_NONNULL_BEGIN
 
 @interface UIViewController (Extension)
+/// Returns the top-most presented view controller from the app's active window.
+/// This mirrors the prior logic in AppDelegate (walks presentedViewController chain).
++ (nullable UIViewController *)kb_topMostViewController;
 @end
 
 NS_ASSUME_NONNULL_END

keyBoard/Class/Categories/UIViewController+Extension.m

@@ -9,4 +9,38 @@
 
 @implementation UIViewController (Extension)
 
+/// Find the app's active window in a scene-friendly way (iOS 13+ safe)
+static inline __kindof UIWindow *KBActiveWindow(void) {
+    UIWindow *window = [UIApplication sharedApplication].keyWindow;
+    if (window) return window;
+    // Fallbacks when keyWindow is nil (e.g. iOS 13+ with scenes)
+    if (@available(iOS 13.0, *)) {
+        for (UIScene *scene in [UIApplication sharedApplication].connectedScenes) {
+            if (scene.activationState != UISceneActivationStateForegroundActive) { continue; }
+            if (![scene isKindOfClass:[UIWindowScene class]]) { continue; }
+            UIWindowScene *ws = (UIWindowScene *)scene;
+            for (UIWindow *w in ws.windows) {
+                if (w.isKeyWindow) { return w; }
+            }
+            if (ws.windows.firstObject) { return ws.windows.firstObject; }
+        }
+    }
+    // iOS 12 and earlier fallback
+    for (UIWindow *w in [UIApplication sharedApplication].windows) {
+        if (w.isKeyWindow) { return w; }
+    }
+    return [UIApplication sharedApplication].windows.firstObject;
+}
+
++ (UIViewController *)kb_topMostViewController {
+    UIWindow *window = KBActiveWindow();
+    UIViewController *root = window.rootViewController;
+    if (!root) return nil;
+    UIViewController *top = root;
+    while (top.presentedViewController) {
+        top = top.presentedViewController;
+    }
+    return top;
+}
+
 @end