标签：ios == bool cte otf 字母 rom ted numbers
以下为NSString类的扩展方法，分别是判断字符串是否只是包含字母、是否只包含数字、是否只包含字母和数字：
//字母 - (BOOL)cdm_isOnlyLetters { NSCharacterSet *letterCharacterset = [[NSCharacterSet letterCharacterSet] invertedSet]; return ([self rangeOfCharacterFromSet:letterCharacterset].location == NSNotFound); } //数字 - (BOOL)cdm_isOnlyNumbers { NSCharacterSet *numSet = [[NSCharacterSet characterSetWithCharactersInString:@"0123456789"] invertedSet]; return ([self rangeOfCharacterFromSet:numSet].location == NSNotFound); } //字母和数字 - (BOOL)cdm_isOnlyAlphaNumeric { NSCharacterSet *numAndLetterCharSet = [[NSCharacterSet alphanumericCharacterSet] invertedSet]; return ([self rangeOfCharacterFromSet:numAndLetterCharSet].location == NSNotFound); }
效果展示:
标签：ios == bool cte otf 字母 rom ted numbers
原文地址：http://www.cnblogs.com/dianming/p/6647397.html
