在开发过程中，有时需要对用户输入的类型做判断，最常见是在注册页面即用户名和密码，代码整理如下：

只能为中文

? 1 2 3 4 5 6 -(BOOL)onlyInputChineseCharacters:(NSString*)string{ NSString *zhString = @"[\u4e00-\u9fa5]+"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",zhString]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString; }

只能为数字

? 1 2 3 4 5 6 - (BOOL)onlyInputTheNumber:(NSString*)string{ NSString *numString =@"[0-9]*"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",numString]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString; }

只能为小写

? 1 2 3 4 5 6 - (BOOL)onlyInputLowercaseLetter:(NSString*)string{ NSString *regex =@"[a-z]*"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString; }

*只能为大写

? 1 2 3 4 5 6 - (BOOL)onlyInputACapital:(NSString*)string{ NSString *regex =@"[A-Z]*"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString; }

允许大小写

? 1 2 3 4 5 6 - (BOOL)InputCapitalAndLowercaseLetter:(NSString*)string{ NSString *regex =@"[a-zA-Z]*"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString; }

允许含大小写或数字(不限字数)

? 1 2 3 4 5 6 - (BOOL)inputLettersOrNumbers:(NSString*)string{ NSString *regex =@"[a-zA-Z0-9]*"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString; }

允许含大小写或数字(限字数)

? 1 2 3 4 5 6 -(BOOL)inputNumberOrLetters:(NSString*)name { NSString *userNameRegex = @"^[A-Za-z0-9]{6,20}+$"; NSPredicate *userNamePredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",userNameRegex]; BOOL inputString = [userNamePredicate evaluateWithObject:name]; return inputString; }

允许汉字或数字(不限字数)

? 1 2 3 4 5 6 - (BOOL)inputChineseOrNumbers:(NSString*)string{ NSString *regex =@"[\u4e00-\u9fa5]+[0-9]*"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString; }

允许汉字或数字(限字数)

? 1 2 3 4 5 6 - (BOOL)inputChineseOrNumbersLimit:(NSString*)string{ NSString *regex =@"[\u4e00-\u9fa5][0-9]{6,20}+$"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString; }

允许汉字，大小写或数字(不限字数)

? 1 2 3 4 5 6 - (BOOL)inputChineseOrLettersAndNumbersNum:(NSString*)string{ NSString *regex =@"[\u4e00-\u9fa5]+[A-Za-z0-9]*"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString; }

允许汉字，大小写或数字(限字数)

? 1 2 3 4 5 6 - (BOOL)inputChineseOrLettersNumberslimit:(NSString*)string{ NSString *regex =@"[\u4e00-\u9fa5]+[A-Za-z0-9]{6,20}+$"; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex]; BOOL inputString = [predicate evaluateWithObject:string]; return inputString; }

以上所述是小编给大家介绍的IOS正则表达式判断输入类型(整理)，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！