封装跨应用拉起，

CustomKeyboard/Utils/KBExtensionAppLauncher.m

@@ -0,0 +1,121 @@
+//
+//  KBExtensionAppLauncher.m
+//  CustomKeyboard
+//
+
+#import "KBExtensionAppLauncher.h"
+#import <objc/message.h>
+
+@implementation KBExtensionAppLauncher
+
++ (void)openPrimaryURL:(NSURL * _Nullable)primaryURL
+           fallbackURL:(NSURL * _Nullable)fallbackURL
+  usingInputController:(UIInputViewController *)ivc
+                source:(UIResponder *)source
+            completion:(void (^ _Nullable)(BOOL success))completion {
+    if (!ivc || (!primaryURL && !fallbackURL)) {
+        if (completion) { completion(NO); }
+        return;
+    }
+
+    // 保证在主线程回调，避免调用方再做一次 dispatch。
+    void (^finish)(BOOL) = ^(BOOL ok){
+        if (!completion) return;
+        if ([NSThread isMainThread]) {
+            completion(ok);
+        } else {
+            dispatch_async(dispatch_get_main_queue(), ^{ completion(ok); });
+        }
+    };
+
+    NSURL *first = primaryURL ?: fallbackURL;
+    NSURL *second = (first == primaryURL) ? fallbackURL : nil;
+
+    if (!first) {
+        finish(NO);
+        return;
+    }
+
+    [ivc.extensionContext openURL:first completionHandler:^(BOOL ok) {
+        if (ok) {
+            finish(YES);
+            return;
+        }
+
+        if (second) {
+            [ivc.extensionContext openURL:second completionHandler:^(BOOL ok2) {
+                if (ok2) {
+                    finish(YES);
+                    return;
+                }
+                BOOL bridged = [self p_bridgeFirst:first second:second from:source];
+                finish(bridged);
+            }];
+        } else {
+            BOOL bridged = [self p_bridgeFirst:first second:nil from:source];
+            finish(bridged);
+        }
+    }];
+}
+
++ (void)openScheme:(NSURL *)scheme
+ usingInputController:(UIInputViewController *)ivc
+              source:(UIResponder *)source
+          completion:(void (^ _Nullable)(BOOL success))completion {
+    [self openPrimaryURL:scheme
+             fallbackURL:nil
+    usingInputController:ivc
+                  source:source
+              completion:completion];
+}
+
+#pragma mark - Private
+
+// 通过响应链尝试调用 openURL:（等价于原 KBURLOpenBridge 实现）
++ (BOOL)p_openURLViaResponder:(NSURL *)url from:(UIResponder *)start {
+#if KB_URL_BRIDGE_ENABLE
+    if (!url || !start) return NO;
+    SEL sel = NSSelectorFromString(@"openURL:");
+    UIResponder *responder = start;
+    while (responder) {
+        @try {
+            if ([responder respondsToSelector:sel]) {
+                BOOL handled = NO;
+                BOOL (*funcBool)(id, SEL, NSURL *) = (BOOL (*)(id, SEL, NSURL *))objc_msgSend;
+                if (funcBool) {
+                    handled = funcBool(responder, sel, url);
+                } else {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
+                    [responder performSelector:sel withObject:url];
+                    handled = YES;
+#pragma clang diagnostic pop
+                }
+                return handled;
+            }
+        } @catch (__unused NSException *e) {
+            // ignore and continue
+        }
+        responder = responder.nextResponder;
+    }
+    return NO;
+#else
+    (void)url; (void)start;
+    return NO;
+#endif
+}
+
++ (BOOL)p_bridgeFirst:(NSURL * _Nullable)first
+               second:(NSURL * _Nullable)second
+                 from:(UIResponder *)source {
+    BOOL bridged = NO;
+    if (first) {
+        bridged = [self p_openURLViaResponder:first from:source];
+    }
+    if (!bridged && second) {
+        bridged = [self p_openURLViaResponder:second from:source];
+    }
+    return bridged;
+}
+
+@end