只允许在 iPhone UITextField 中输入英文字符 [英] allow only to enter english characters in iPhone UITextField

问题描述

我想只允许用户输入英文字母和字符.如何防止用户输入英文以外的其他字符.

I want to allow user to enter only english alphabets and characters. How can i prevent user from entering other characters than english.

推荐答案

查看 UIKeyboardType - 有一个选项仅支持 ASCII (UIKeyboardTypeASCIICapable).

Check out UIKeyboardType - there is an option to support only ASCII (UIKeyboardTypeASCIICapable).

此外，UITextFieldDelegate 协议中有一些选项可以让您有选择地过滤输入.看看:

Also, there are options in the UITextFieldDelegate protocol that could allow you to selectively filter input. Take a look at:

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string;

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