UIKeyboardTypeDefault

UIKeyboardTypeASCIICapable

UIKeyboardTypeNumbersAndPunctuation

UIKeyboardTypeURL

UIKeyboardTypeNumberPad

UIKeyboardTypeDecimalPad

UIKeyboardTypePhonePad

UIKeyboardTypeNamePhonePad

UIKeyboardTypeEmailAddress

UIKeyboardTypeTwitter

UIKeyboardTypeWebSearch

UIKeyboardTypeDefault, 　默认键盘，支持所有字符

UIKeyboardTypeASCIICapable,　支持ASCII的默认键盘UIKeyboardTypeNumbersAndPunctuation,　标准电话键盘，支持＋＊＃字符UIKeyboardTypeURL, URL键盘，支持.com按钮 只支持URL字符UIKeyboardTypeNumberPad, 　数字键盘UIKeyboardTypePhonePad,　 　电话键盘UIKeyboardTypeNamePhonePad, 　电话键盘，也支持输入人名UIKeyboardTypeEmailAddress, 　用于输入电子 邮件地址的键盘UIKeyboardTypeDecimalPad, 　数字键盘 有数字和小数点UIKeyboardTypeTwitter, 　优化的键盘，方便输入@、#字符

UIKeyboardTypeAlphabet=UIKeyboardTypeASCIICapable,