ios - 获取当前在“设置”中启用的键盘？

Question

有什么方法可以识别在“设置”中启用了哪些键盘？

只有在启用了中文键盘的情况下才能分享到新浪微博，所以我只想在有中文键盘的情况下显示“新浪微博”操作表按钮。

Answer 1

感谢 Guy 的评论，有更好的方法来做到这一点。我已经更新了自己的代码以使用以下内容：

NSArray *keyboards = [UITextInputMode activeInputModes];
for (UITextInputMode *mode in keyboards) {
    NSString *name = mode.primaryLanguage;
    if ([name hasPrefix:@"zh-Han"]) {
        // One of the Chinese keyboards is installed
        break;
    }
}

斯威夫特：（注意：在 iOS 9.x下由于UITextInputMode activeInputModes.

let keyboards = UITextInputMode.activeInputModes()
for var mode in keyboards  {
    var primary = mode.primaryLanguage
    if let lang = primary {
        if lang.hasPrefix("zh") {
            // One of the Chinese keyboards is installed
            break
        }
    }
}

---

旧方法：

我不知道在 App Store 应用程序中是否允许这样做，但你可以这样做：

NSArray *keyboards = [[NSUserDefaults standardUserDefaults] objectForKey:@"AppleKeyboards"];
for (NSString *keyboard in keyboards) {
    if ([keyboard hasPrefix:@"zh_Han"]) {
        // One of the Chinese keyboards is installed
    }
}

如果用户只有其语言环境的默认键盘，则可能没有该AppleKeyboards键的条目。在这种情况下，您可能需要检查用户的语言环境。如果语言环境是针对中国的，那么您应该假设他们有中文键盘。

Answer 2

此代码对我在父应用程序本身的设备设置中识别键盘扩展是否已激活非常有帮助：

    //Put below function in app delegate...

    public func isKeyboardExtensionEnabled() -> Bool {
        guard let appBundleIdentifier = NSBundle.mainBundle().bundleIdentifier else {
            fatalError("isKeyboardExtensionEnabled(): Cannot retrieve bundle identifier.")
        }

        guard let keyboards = NSUserDefaults.standardUserDefaults().dictionaryRepresentation()["AppleKeyboards"] as? [String] else {
            // There is no key `AppleKeyboards` in NSUserDefaults. That happens sometimes.
            return false
        }

        let keyboardExtensionBundleIdentifierPrefix = appBundleIdentifier + "."
        for keyboard in keyboards {
            if keyboard.hasPrefix(keyboardExtensionBundleIdentifierPrefix) {
                return true
            }
        }

        return false
    }


    // Call it from below delegate method to identify...

    func applicationWillEnterForeground(_ application: UIApplication) {

            if(isKeyboardExtensionEnabled()){            
                showAlert(message: "Hurrey! My-Keyboard is activated");
            }
            else{
                showAlert(message: "Please activate My-Keyboard!");
            }

        }

    func applicationDidBecomeActive(_ application: UIApplication) {

            if(isKeyboardExtensionEnabled()){            
                showAlert(message: "Hurrey! My-Keyboard is activated");
            }
            else{
                showAlert(message: "Please activate My-Keyboard!");
            }
        }