好吧, 圖是百度偷的
1.UIKeyboardTypeDefault
2.UIKeyboardTypeASCIICapable == UIKeyboardTypeAlphabet
3.UIKeyboardTypeNumbersAndPunctuation
4.UIKeyboardTypeURL
5.UIKeyboardTypeNumberPad
6.UIKeyboardTypeDecimalPad
7.UIKeyboardTypePhonePad
8.UIKeyboardTypeNamePhonePad
9.UIKeyboardTypeEmailAddress
10UIKeyboardTypeTwitter
11.UIKeyboardTypeWebSearch