要求UItextField指数如中文、数字、英文

在开发中我们有时候会对UITextFiled 进行1些操作，说1下如何只输入中文，或 只输入 数字 和英文 2中方法

我直接用宏定义定义：

#define kAlphaNum @"abcdefghijklmnopqrstuvwxyz" //这类是对应只输入中文 不允许其他数字或符号的

#define kEnglishNum @"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" //这类是对应只能输入数字和英文的方法

履行UITextField 的delegate 方法 切记 textFiled.delegate = self;

下面直接上代码:

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

UITextField *nameField = (UITextField *)[self viewWithTag:200];

UITextField *cardField = (UITextField *)[self viewWithTag:201];

if (textField == nameField) {

//只允许输入中文

NSCharacterSet *cs;

cs = [[NSCharacterSet characterSetWithCharactersInString:kAlphaNum] invertedSet];

NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""];

BOOL basic = [string isEqualToString:filtered];

NSString *text = [textField.text stringByReplacingCharactersInRange:range withString:string];

if (_delegate && [_delegate respondsToSelector:@selector(passName:)]) {

[_delegate passName:text];

}

return basic;

}

if (textField == cardField) {

//只允许输入英文和数字

NSCharacterSet *cs;

cs = [[NSCharacterSet characterSetWithCharactersInString:kEnglishNum] invertedSet];

NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""];

BOOL basic = [string isEqualToString:filtered];

NSString *text = [textField.text stringByReplacingCharactersInRange:range withString:string];

if (_delegate && [_delegate respondsToSelector:@selector(passCard:)]) {

[_delegate passCard:text];

}

return basic;

}

return YES;

}

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