typedef NS_ENUM(NSInteger, UIKeyboardType) {
    UIKeyboardTypeDefault,                // Default type for the current input method.
    UIKeyboardTypeASCIICapable,           // Displays a keyboard which can enter ASCII characters
    UIKeyboardTypeNumbersAndPunctuation,  // Numbers and assorted punctuation.
    UIKeyboardTypeURL
 
,                    // A type optimized for URL entry (shows . / .com prominently).
    UIKeyboardTypeNumberPad,              // A number pad with locale-appropriate digits (0-9, ۰-۹, ०-९, etc.). Suitable for PIN entry.
    UIKeyboardTypePhonePad,               // A phone pad (1-9, *, 0, #, with letters under the numbers).
    UIKeyboardTypeNamePhonePad
 
,           // A type optimized for entering a person's name or phone number.
    UIKeyboardTypeEmailAddress,           // A type optimized for multiple email address entry (shows space @ . prominently).
    UIKeyboardTypeDecimalPad NS_ENUM_AVAILABLE_IOS(4_1),   // A number pad with a decimal point.
    UIKeyboardTypeTwitter
 
 NS_ENUM_AVAILABLE_IOS(5_0),      // A type optimized for twitter text entry (easy access to @ #)
    UIKeyboardTypeWebSearch NS_ENUM_AVAILABLE_IOS(7_0),    // A default keyboard type with URL-oriented addition (shows space . prominently).
    UIKeyboardTypeASCIICapableNumberPad NS_ENUM_AVAILABLE_IOS(10_0), // A number pad (0-9) that will always be ASCII digits.

    UIKeyboardTypeAlphabet = UIKeyboardTypeASCIICapable, // Deprecated

};

• 新增了第1個Default鍵盤和第4個URL鍵盤
• 刪除了Alphabet鍵盤，替換為Default鍵盤

1、UIKeyboardTypeDefault

常用於文字輸入

2、UIKeyboardTypeASCIICapable

常用於密碼輸入
3、UIKeyboardTypeNumbersAndPunctuation

主鍵盤顯示如上圖，次鍵盤顯示字母
4、UIKeyboardTypeURL

適用於網址輸入
5、UIKeyboardTypeNumberPad

只有數字的數字鍵盤
6、UIKeyboardTypePhonePad

可用於撥號的數字鍵盤
7、UIKeyboardTypeNamePhonePad

主鍵盤顯示如上圖，次鍵盤顯示如下圖

8、UIKeyboardTypeEmailAddress

適用於郵件地址輸入的鍵盤
9、UIKeyboardTypeDecimalPad

帶“點”的數字鍵盤，可用於帶有小數點的數字輸入
10、UIKeyboardTypeTwitter

11、UIKeyboardTypeWebSearch

適用於網頁搜尋的鍵盤