uitextfiled Settings for keyboard styles

2. Set keyboard style, such as bank withdrawal password only need number, some input mailbox need @ and so on
4. Uikeyboardtypealphabet and Uikeyboardtypedefault are similar, we usually see that, are letters, and then there is a button to switch symbols
6. Uikeyboardtypeasciicapable seems to be similar to the top.
8. Uikeyboardtypedecimalpad,uikeyboardtypenumberpad are numbers, but the former has a "decimal point" button.
10. uikeyboardtypeemailaddress-In addition to the letters and the decimal point and @ appear
12. Uikeyboardtypenamephonepad-looks normal.
14. uikeyboardtypephonepad-telephone keypad, not only numbers but also * and # of the kind
16. uikeyboardtypenumbersandpunctuation-only numbers and punctuation
18. uikeyboardtypetwitter-in addition to letters and @ and #, this is the sign of Weibo
20. uikeyboardtypeurl-In addition to letters, and. com buttons for easy entry
22. uikeyboardtypewebsearch-The main difference is that the return key becomes the Go key

uitextfiled Settings for keyboard styles