ios 數字加字母正則表達式

數字加字母正則

    NSString *regex = @"\\d{0,}([a-z]{1,}\\d{1,}){1,}[a-z]{0,}";
    regex = @"((?=.*\\d)(?=.*[a-zA-Z]))[\\da-zA-Z]*";
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];

    NSString *string1 = @"6e";
    NSString *string2 = @"nkasdnkflaks";
    NSString *string3 = @"sdfasdfa8u98u98fsdfu09";

    BOOL res1 = [predicate evaluateWithObject:string1];
    BOOL res2 = [predicate evaluateWithObject:string2];
    BOOL res3 = [predicate evaluateWithObject:string3];