一、应用场景
很多情况下我们的输入都是有硬性要求的,比如只能输入数字,通常情况下我们的解决方案就是指定输入框的键盘模式(keyboardType),可系统提供给我的键盘种类还是非常有限的,如下所示:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | typedef NS_ENUM(NSInteger, UIKeyboardType) { ????UIKeyboardTypeDefault,??????????????? // Default type for the current input method. ????UIKeyboardTypeASCIICapable,?????????? // Displays a keyboard which can enter ASCII characters, non-ASCII keyboards remain active ????UIKeyboardTypeNumbersAndPunctuation,? // Numbers and assorted punctuation. ????UIKeyboardTypeURL,??????????????????? // A type optimized for URL entry (shows . / .com prominently). ????UIKeyboardTypeNumberPad,????????????? // A number pad (0-9). 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). ? ????UIKeyboardTypeAlphabet = UIKeyboardTypeASCIICapable, // Deprecated ? }; |
[……]