NSDictionary* headers; = [(NSHTTPURLResponse *)response allHeaderFields];
NSString *str;= [headers objectForKey:#"Www-Authenticate"];
NSLog(#"value:%#",str);
value:First aid="my server part", qop="accept", nonce="nyeraAT567WE"
I want to get and print only nonce
You need a regex to extract it:
NSError *error=nil;
NSRegularExpression *regex = [[NSRegularExpression alloc] initWithPattern:#"nonce=\"(.*)\"" options:0 error:&error];
NSTextCheckingResult *match = [regex firstMatchInString:str options:0 range:NSMakeRange(0, [str length])];
NSString *nonce = [str substringWithRange:[match rangeAtIndex:1]];
NSLog(#"%#",nonce);
Related
I'm trying to trim an NSString after I detect 3 new line instances. (\n). So, this is what I've tried:
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:#"\n" options:NSRegularExpressionCaseInsensitive error:&error];
NSUInteger numberOfMatches = [regex numberOfMatchesInString:string options:0 range:NSMakeRange(0, [myString length])];
Now, number of matches will always exceed 3, and I want to stop the string right as it hits the third \n. Does any one know any good logic to do this?
If the 3 new line instances are always grouped together it's pretty easy:
NSString *testString = #"The quick brown fox jumps \n\n\n over the lazy dog. \n\n\n New Line.";
[[string componentsSeparatedByString:#"\n\n\n"] firstObject]
Otherwise you could use:
NSError *error;
NSString *pattern = #"(\\A|\\n\\s*\\n\\s*\\n)(.*?\\S[\\s\\S]*?\\S)(?=(\\Z|\\s*\\n\\s*\\n\\s*\\n))";
NSRegularExpression* regex = [[NSRegularExpression alloc] initWithPattern:pattern
options:NSRegularExpressionCaseInsensitive
error:&error];
[regex enumerateMatchesInString:testString
options:0
range:NSMakeRange(0, [testString length])
usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) {
NSString *match = [testString substringWithRange:[result rangeAtIndex:2]];
NSLog(#"match = '%#'", match);
}];
(Taken from this answer)
NSString* originalString = #"This\nis\na\ntest string";
NSRegularExpression* regex = [NSRegularExpression regularExpressionWithPattern:#".*\\n.*\\n.*\\n" options:0 error:nil];
NSRange range = [regex rangeOfFirstMatchInString:originalString options:0 range:(NSRange){0,originalString.length}];
NSString* trimmedString = [originalString substringFromIndex:range.length];
NSLog(#"Original: %#", originalString);
NSLog(#"Trimmed: %#", trimmedString);
Prints:
2015-02-05 21:39:41.491 TestProject[4258:1269568] Original: This
is
a
test string
2015-02-05 21:39:41.492 TestProject[4258:1269568] Trimmed: test string
I have the following code which works:
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:#"[a-cA-C2][m-oM-O][a-cA-C2]" options:0 error:NULL];
NSString *str = #"Ana";
NSTextCheckingResult *match1 = [regex firstMatchInString:str options:0 range:NSMakeRange(0, [str length])];
NSLog(#"check is exist: %#", [str substringWithRange:[match1 rangeAtIndex:0]]);
Here are my questions:
1.Is there a way I can change the NSString with an NSMutableArray and save the NSTextCheckingResult in a NSMutableArray called filterArray?
2.How to highlight the matching values when displaying then in a TextField?
If I correctly understand your question,
you want to use NSArray of strings, and receive NSArray of matching results for each string.
So, 1:
NSArray *arrayOfStrings = /* Your array */;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:#"[a-cA-C2][m-oM-O][a-cA-C2]" options:0 error:NULL];
NSMutableArray *filterArray = [NSMutableArray array];
[arrayOfStrings enumerateObjectsUsingBlock:^(NSString * str, NSUInteger idx, BOOL * stop) {
NSTextCheckingResult *match = [regex firstMatchInString:str options:0 range:NSMakeRange(0, [str length])];
if (match) {
[filterArray addObject:match];
}
else {
[filterArray addObject:[NSNull null]];
}
NSLog(#"String #%i. check is exist: %#",idx, [str substringWithRange:[match rangeAtIndex:0]]);
}];
2: For highlighting ranges of the string you need to use NSAttributedString. Please, see this question for the answer how:) How do you use NSAttributedString?
After you formed attributed string, set it to textfield:
NSAttributedString * attributedString;
UITextField *textField;
[ttextField setAttributedText:attributedString];
I have the following code:
//NSMutableArray sections - contains some data;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:#"[a-c]" options:0 error:NULL];
[sections enumerateObjectsUsingBlock:^(NSString * str, NSUInteger idx, BOOL * stop) {
NSTextCheckingResult *match = [regex firstMatchInString:str options:0 range:NSMakeRange(0, [str length])];
if (match) {
[filteredList addObject:match];
}
}];
In this case sections is a NSMutableArray.
How should i change the code if sections would be an NSMutableArray of NSMutableArrays?
If curently sections is a NSMutableArray how can I declare a NSMutableArray of NSMutableArrays of sections?
I am a beginner in objective-c.
I have the following NSMutableString stringVal=#"[abc][test][end]";
What is the best way I should use in order to REMOVE THE LAST [] piece (e.g [end])?
I have this code:
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:#"\[]" options:0 error:NULL];
NSArray *matches = [regex matchesInString:stringVal options:0 range:NSMakeRange(0, [stringVal length])];
for (NSTextCheckingResult *match in matches) {
?? what should i do here?
}
I think you should use this regular expression pattern "\\[.*?]" then you get three matches
['[abc]', '[test]', '[end]']
then can just get the range of the third match (check that you have at least three)
NSMutableString* stringVal= [NSMutableString stringWithString:#"[abc][test][end]"];
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:#"\\[.*?]" options:0 error:NULL];
NSArray *matches = [regex matchesInString:stringVal options:0 range:NSMakeRange(0, [stringVal length])];
NSTextCheckingResult* match = matches[2];
NSMutableString* substring = [[stringVal substringToIndex:match.range.location] mutableCopy];
jbat was right that you should modify the regex. After that, all you need is the last match, so you could use
NSTextCheckingResult *match = [matches lastObject]; // Get the last match
NSRange matchRange = [match range]; // Get the position of the match segment
NSString *result = [stringVal stringByReplacingCharactersInRange:matchRange withString:#""]; // Replace the segment by an empty string.
I need to extract all the strings surrounded by two characters (or maybe two tags)
this is what I've done so far:
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:#"\\[(.*?)\\]" options:NSRegularExpressionCaseInsensitive error:NULL];
NSArray *myArray = [regex matchesInString:#"[db1]+[db2]+[db3]" options:0 range:NSMakeRange(0, [#"[db1]+[db2]+[db3]" length])] ;
NSLog(#"%#",[myArray objectAtIndex:0]);
NSLog(#"%#",[myArray objectAtIndex:1]);
NSLog(#"%#",[myArray objectAtIndex:2]);
In myArray there are correctly three objects but NSlog prints this:
<NSSimpleRegularExpressionCheckingResult: 0x926ec30>{0, 5}{<NSRegularExpression: 0x926e660> \[(.*?)\] 0x1}
<NSSimpleRegularExpressionCheckingResult: 0x926eb30>{6, 5}{<NSRegularExpression: 0x926e660> \[(.*?)\] 0x1}
<NSSimpleRegularExpressionCheckingResult: 0x926eb50>{12, 5}{<NSRegularExpression: 0x926e660> \[(.*?)\] 0x1}
instead of db1, db2 and db3
where I'm wrong?
According to the documentation matchesInString:options:range: returns an array of NSTextCheckingResults not NSStrings. You will need to loop over the results and use the ranges to get the substrings.
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:#"\\[(.*?)\\]" options:NSRegularExpressionCaseInsensitive error:NULL];
NSString *input = #"[db1]+[db2]+[db3]";
NSArray *myArray = [regex matchesInString:input options:0 range:NSMakeRange(0, [input length])] ;
NSMutableArray *matches = [NSMutableArray arrayWithCapacity:[myArray count]];
for (NSTextCheckingResult *match in myArray) {
NSRange matchRange = [match rangeAtIndex:1];
[matches addObject:[input substringWithRange:matchRange]];
NSLog(#"%#", [matches lastObject]);
}
Or this
NSArray *results = [#"[db1]+[db2]+[db3]" matchWithRegex:#"\\[(.*?)\\]"];
//result = #["db1","db2,"db3"]
With this category https://github.com/damienromito/NSString-Matcher