pragma - mark 只能为中文

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

}

pragma - mark 只能为数字

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

pragma - mark 只能为小写

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

pragma - mark 只能为大写

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

pragma - mark 允许大小写

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

pragma - mark 允许含大小写或数字(不限字数)

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

pragma - mark 允许含大小写或数字(限字数)

-(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;
}

pragma - mark 允许汉字或数字(不限字数)

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

pragma - mark 允许汉字或数字(限字数)

- (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;
}

pragma - mark 允许汉字，大小写或数字(不限字数)

- (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;
}

pragma - mark 允许汉字，大小写或数字(限字数)

- (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;
}