iOS开发支持的8种风格键盘

1. typedef enum {  
2.     UIKeyboardTypeDefault,                // 默认键盘：支持所有字符  
3.     UIKeyboardTypeASCIICapable,           // 支持ASCII的默认键盘  
4.     UIKeyboardTypeNumbersAndPunctuation,  // 标准电话键盘，支持+*#等符号  
5.     UIKeyboardTypeURL,                    // URL键盘，有.com按钮；只支持URL字符  
6.     UIKeyboardTypeNumberPad,              //数字键盘  
7.     UIKeyboardTypePhonePad,               // 电话键盘  
8.     UIKeyboardTypeNamePhonePad,           // 电话键盘，也支持输入人名字  
9.     UIKeyboardTypeEmailAddress,           // 用于输入电子邮件地址的键盘  
10. } UIKeyboardType;