How to determine whether to input in ios using regular expressions-JS Tutorial-php.cn

How to determine whether to input in ios using regular expressions

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Release： 2018-03-30 10:46:24

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This time I will show you how to use regular expressions to determine whether to input in ios, and how to determine whether to input in regular expressions in ios.

can only be Chinese

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

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can only be numbers

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

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can only be lowercase

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

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*Only uppercase letters

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

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Allow uppercase and lowercase letters

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

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Allow uppercase and lowercase letters or numbers (No limit on the number of characters)

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

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Allows uppercase and lowercase letters or numbers (limit on the number of characters)

-(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;
}

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Allows Chinese characters or numbers (no limit on the number of characters)

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

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Allows Chinese characters or numbers (limited number of characters)

- (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;
}

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Allows Chinese characters, uppercase and lowercase or numbers (limited number of characters)

- (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;
}

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Allows Chinese characters, uppercase and lowercase or numbers (limited number of characters)

- (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;
}

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I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other php Chinese websites related articles!