獲取當前在設置中啓用的鍵盤？

Question

有什麼方法可以確定哪些鍵盤在設置中啓用？

只有啓用中文鍵盤才能分享到新浪微博，所以如果有中文鍵盤可用，我只想顯示「新浪微博」操作表按鈕。

Answer 1

感謝Guy的評論，有更好的方法來做到這一點。我已經更新了我自己的代碼使用以下命令：

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：一個變通方法下的iOS 9.x的殘破由於糟糕的聲明UITextInputMode activeInputModes見this answer。）

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 
     } 
    } 
} 

---

老辦法：

我不知道這是在App Store應用允許或沒有，但你可以這樣做：

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

這是可能的，如果用戶僅擁有默認鍵盤爲自己的語言環境，也不會有對AppleKeyboards鍵的條目。在這種情況下，您可能想要檢查用戶的區域設置。如果語言環境是針對中國的，那麼你應該認爲他們有中文鍵盤。

Answer 2

這段代碼是真正有用的，我來識別鍵盤延長被激活或者未設備設置從父應用程序本身：

//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!"); 
      } 
     }