johnny77221 · October 29, 2020 06:14 · Oct 29, 2020
diff --git a/SwiftUser.swift b/SwiftUser.swift
@@ -0,0 +1,9 @@
+import UIKit
+
+class SwiftUser: UIViewController {
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        TestLib().myFunc()
+    }
+
+}
diff --git a/TestLib.swift b/TestLib.swift
@@ -0,0 +1,7 @@
+import Foundation
+
+@objc class TestLib: NSObject {
+    @objc fileprivate func _myFunc() {
+        print("I am here")
+    }
+}
diff --git a/TestLib_Objc.h b/TestLib_Objc.h
@@ -0,0 +1,6 @@
+#import "test-Swift.h"
+
+@interface TestLib (Ext)
+-(void)myFunc NS_SWIFT_UNAVAILABLE("objc only");
+@end
+
diff --git a/TestLib_Objc.m b/TestLib_Objc.m
@@ -0,0 +1,24 @@
+#import "TestLib_Objc.h"
+
+@implementation TestLib(Ext)
+-(void)myFunc {
+    [self performSelector:NSSelectorFromString(@"_myFunc")];
+}
+
+@end
+
+
+@interface TestObjcUser: NSObject
+@end
+@implementation TestObjcUser
+
+- (instancetype)init
+{
+    self = [super init];
+    if (self) {
+        [[[TestLib alloc] init] myFunc];
+    }
+    return self;
+}
+
+@end