I need to pull out the excel file to interface that user can only read the information in file.
what is the solution to implement it?
The most easy way to solve this is first, convert the Excel file to CSV format, which stands for Comma Seperated Value. Meaning it's formatted like: cell 1,cell 2,cell 3. And a new line for each row.
The second is to read the file into a String which can be done in two ways, depending if you have it local or not. Let's say you have it on a server.
NSURL *url = [NSURL urlWithString:#"http://urltoyour.excel/file.csv"];
NSData *data = [NSData dataWithContentOfURL:url];
NSString *string = [NSString stringWithData:data];
Then you can easily convert this to arrays using
NSArray *lines = [string componentsSeparatedByCharactersInSet:[NSCharacterSet newlineCharacterSet]];
Now you have each excel line in that array. Now for each line you probably want the columns in an array too, you can do that using:
NSMutableArray *finalArray = [NSMutableArray new];
for (NSString *line in lines) {
NSArray *array = [line componentsSeperatedByString:#","];
[finalArray addObject:array];
}
Good luck and let me know if that works out for you!
Related
I need to pass this array to SOAP API as a parameter. The back-end guy is new to building APIs (C#/.NET) and I have never implemented this kind of API before. There are 4-5 SO question related to this. But none of them were the solution as per my query.
NSArray *arr = [NSArray arrayWithObjects:#"1",#"2", nil];
NSString *soapURL = #"http://tempuri.org/IService1/addRecord";
NSString *soapBody = [NSString stringWithFormat:#"<addRecord xmlns=\"http://tempuri.org/\">"
"<id>%#</id>"
"<title>%#</title>"
"<record>%#</record>"
"</addRecord> \n” ,#“1”,#“abc", arr ];
NSLog(#"%#",soapBody);
Error:
value in string The formatter threw an exception while trying to deserialize the message: Error in deserializing body of request message for operation 'addRecord'. End element 'record' from namespace 'http://tempuri.org/' expected. Found text '(
1,
2
)'.
One thing I came to know that I cannot pass array directly in to soapBody. What what is the alternative?
The API is working fine at the back-end.
some comments:
NSArray *arr = [NSArray arrayWithObjects:#"1",#"2", nil];
please write instead the modern form:
NSArray *arr = #[#"1",#"2"];
Also, your question is filled with wrong types of quotes (“1”). Make sure to use the regular quotes, i.e. ".
When you use "stringWithFormat" with %# and provide an array, you must understand what you are getting there. let's try:
NSArray *arr = #[#"1",#"2"];
NSString *str = [NSString stringWithFormat:#"<%#>", arr];
NSLog(#"%#", str);
The result is:
<(
1,
2
)>
It means that between your <record> and </record> you inserted two numbers separated by a comma and surrounded by parentheses, plus some \n.
Is this what your server is expecting?
So I am not solving your problem, but you must format your string the right way and verify it using your NSLog command. Hoping it is helping.
EDIT
If for example you need to provide the values of the array within <value>...</value> than you can do this:
NSArray *arr = #[#"1", #"2"];
NSMutableString *mStr = [NSMutableString string];
for (NSString *value in arr) {
[mStr appendFormat:#"<value>%#</value>", value];
}
NSLog(#"<record>%#</record>", mStr);
And the result will be
<record><value>1</value><value>2</value></record>
Finally I resolved this issue with this code:
NSString *soapBody = [NSString stringWithFormat:#"< addRecord xmlns=\"http://tempuri.org/\" xmlns:arr=\"http://schemas.microsoft.com/2003/10/Serialization/Arrays\" > \n"
"<ID>1</ID>\n"
"<title>ABC</title>\n"
"<record>\n"];
for (int i=0; i<arrRecord.count; i++) {
soapBody = [NSString stringWithFormat:#"%# <arr:int>%#</arr:int>\n",soapBody,arrRecord[i]];
}
soapBody = [NSString stringWithFormat:#"%# </record></addRecord> \n",soapBody];
I needed to define "arr" in the parent node and type of element(int) in the record array.
I have a loop that identifies elements of a webpage via its HTML and extracts the sections I need. I'm wanting to build an array or (very) long string of the extracted text which can be used later.
The extraction uses TFHpple from GitHub. The problem seems to lie with the extracted text being a _CFNSString, and these don't allow me to transpose them into a NSString or NSMutuableArray.
The code I'm using is:
NSArray *webNodes = [webParser searchWithXPathQuery:tutorialsXpathQueryString];
NSString *extractedText = [[NSString alloc] init];
NSMutableArray *extractedArray = [[NSMutableArray alloc] initWithCapacity:0];
for (TFHppleElement *element in webNodes) {
Extraction *extraction = [[Extraction alloc] init];
[extractedArray addObject:extraction];
extraction.title = [[element firstChild] content];
extractedText = extraction.title;
NSLog(#"\n\nTitle: %#", extractedText);
}
The NSLog at this point shows me extractedText holds I'm after for each loop, breaking the code shows extractedText to be a _CFNSString.
If I try adding
text = [text StringByAppendingString extractedText];
(with 'text' being an NSString initialised before the loop) as the last step of the loop I get a null value. Its the same if I try adding text or extraction.title directly into an array.
I found this question Convert NSCFString to NSString but the conversion seems to be going the other way (NSString to CFNSString). When I added equivalent code I got bridging errors and the code doesn't run.
How can I collect the data within extraction.title to build a string or array that can be used later?
You said you only want a text.
Get it in one line of code for array:
NSArray *extractedArray = [webNodes valueForKeyPath:#"firstChild.content"];
For string:
NSString *extractedText = [webNodes valueForKeyPath:#"firstChild.content"] componentsJoinedByString:#" "];
I've looked around a bit and tried a few things, but none have really worked. What I'm trying to do is create a NSArray of NSStrings, with each array value corresponding to one line from the Rich Text File I'm referencing. At first I tried this:
NSArray* data = [[NSString stringWithContentsOfFile:#"relevantFile.rtf" encoding:4 error:nil] componentsSeparatedByCharactersInSet: [NSCharacterSet newlineCharacterSet]];
I've also tried this, because I found it in the iOS developer library:
NSArray* data = [[NSArray alloc] initWithContentsOfFile:#"relevantFile.rtf"];
However, neither of these has worked for me. A few lines later in the code, in order to diagnose errors, I have the following code:
for(int i = 0; i < [data count]; i++)
{
NSLog(#"%#", [data objectAtIndex: i]);
}
...for which NSLog is printing "(null)". I'm not entirely sure what I'm doing wrong here -- should I be using mutable strings or arrays, or is there some better way to go about this that I don't know about?
That first line you posted should do it. My guess would be that it's not finding the file. Not specifying an absolute path, the app will look in the current directory which is probably NOT where the file is.
If the file is a resource that is compiled into your app bundle, you can use the following code to obtain the path to it:
NSString* path = [[NSBundle mainBundle] pathForResource: #"relevantFile" ofType: #"rtf"]
NSArray* data = [[NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil] componentsSeparatedByCharactersInSet: [NSCharacterSet newlineCharacterSet]];
Okay I am new to objective C and am trying hard to learn it on my own with out bother the stacked overflow community to much but it is really quite different then what I'm used to (C++).
But I have come across a issue that I for the life of me can't figure out and I'm sure it's going be something stupid. But I am pulling questions and answers from a website that then will display on my iOS application by using this code.
NSString * GetUrl = [NSString stringWithFormat:#"http://www.mywebpage.com/page.php"];
NSString * GetAllHtml = [NSString stringWithContentsOfURL:[NSURL URLWithString:GetUrl] encoding:1 error:nil];
NSString *PullWholeQuestion = [[GetAllHtml componentsSeparatedByString:#"<tr>"] objectAtIndex:1];
NSString *FinishWholeQuestion = [[PullWholeQuestion componentsSeparatedByString:#"</tr>"] objectAtIndex:0];
After I get all of the webpage information I strip down each question and want to make it where it will do a loop process to pull the questions so basically I need to count how many array options there are for the FinishedWholeQuestion variable
I found this snippet online that seemed to work with there example but I cant repeat it
NSArray *stringArray = [NSArray arrayWithObjects:#"1", #"2", nil];
NSLog(#"count = %d", [stringArray count]);
"componentsSeparatedByString" returns an NSArray object, not a single NSString.
An array object can contain zero, one or more NSString objects, depending on the input.
If you change "FinishWholeQuestion" into a NSArray object, you'll likely get a few components (separate by a string).
And now that I'm looking at your code a little more closely, I see you're making an assumption that your array is always valid (and has more than 2 entries, as evidenced by the "objectAtIndex: 1" bit).
You should also change the first character of all your Objective-C variables. Best practices in Objective-C are that the first character of variables should always be lower case.
Like this:
NSString * getUrl = [NSString stringWithFormat:#"http://www.mywebpage.com/page.php"];
NSString * getAllHtml = [NSString stringWithContentsOfURL:[NSURL URLWithString:getUrl] encoding: NSUTF8StringEncoding error:nil];
NSArray * allQuestions = [getAllHtml componentsSeparatedByString:#"<tr>"];
if([allQuestions count] > 1)
{
// assuming there is at least two entries in this array
NSString * pullWholeQuestion = [allQuestions objectAtIndex: 1];
if(pullWholeQuestion)
{
NSString *finishWholeQuestion = [[pullWholeQuestion componentsSeparatedByString:#"</tr>"] objectAtIndex:0];
}
}
Wanted to find the best programming approach in iOS to manipulate and process text strings. Thanks!
Would like to take a file with strings to manipulate the characters similar to the following:
NQXB26JT1RKLP9VHarren Daggett B0BMAF00SSQ ME03B98TBAA8D
NBQB25KT1RKLP05Billison Whiner X0AMAF00UWE 8E21B98TBAF8W
...
...
...
Each string would process in series then loop to the next string, etc.
Strip out the name and the following strings:
Take the following 3 string fragments and convert to another number base. Have the code to process the new result but unsure of how to send these short strings to be processed in series.
QXB26
B0BM
BAA8
Then output the results to a file. The xxx represents the converted numbers.
xxxxxxxxx Harren Daggett xxxxxxxx xxxxxxxx
xxxxxxxxx Billison Whiner xxxxxxxx xxxxxxxx
...
...
...
The end result would be pulling parts of strings out of the first file and create a new file with the desired result.
There are several ways to accomplish what you are after, but if you want something simple and reasonably easy to debug, you could simply split up each record by the fixed position of each of the fields you have identified (the numbers, the name), then use a simple regular expression replace to condense the name and put it all back together.
For purposes like this I prefer a simple (and even a bit pedestrian) solution that is easy to follow and debug, so this example is not optimised:
NSFileManager *fm = [NSFileManager defaultManager];
NSArray *URLs = [fm URLsForDirectory: NSDocumentDirectory
inDomains: NSUserDomainMask];
NSURL *workingdirURL = URLs.lastObject;
NSURL *inputFileURL = [workingdirURL URLByAppendingPathComponent:#"input.txt" isDirectory:NO];
NSURL *outputFileURL = [workingdirURL URLByAppendingPathComponent:#"output.txt" isDirectory:NO];
// For the purpose of this example, just read it all in one chunk
NSError *error;
NSString *stringFromFileAtURL = [[NSString alloc]
initWithContentsOfURL:inputFileURL
encoding:NSUTF8StringEncoding
error:&error];
if ( !stringFromFileAtURL) {
// Error, do something more intelligent that just returning
return;
}
NSArray *records = [stringFromFileAtURL componentsSeparatedByCharactersInSet: [NSCharacterSet newlineCharacterSet]];
NSMutableArray *newRecords = [NSMutableArray array];
for (NSString *record in records) {
NSString *firstNumberString = [record substringWithRange:NSMakeRange(1, 5)];
NSString *nameString = [record substringWithRange:NSMakeRange(15, 27)];
NSString *secondNumberString = [record substringWithRange:NSMakeRange(43, 4)];
NSString *thirdNumberString = [record substringWithRange:NSMakeRange(65, 4)];
NSString *condensedNameString = [nameString stringByReplacingOccurrencesOfString:#" +"
withString:#" "
options:NSRegularExpressionSearch
range:NSMakeRange(0, nameString.length)];
NSString *newRecord = [NSString stringWithFormat: #"%# %# %# %#",
convertNumberString(firstNumberString),
condensedNameString,
convertNumberString(secondNumberString),
convertNumberString(thirdNumberString) ];
[newRecords addObject: newRecord];
}
NSString *outputString = [newRecords componentsJoinedByString:#"\n"];
[outputString writeToURL: outputFileURL
atomically: YES
encoding: NSUTF8StringEncoding
error: &error];
In this example convertNumberString is a plain C function that converts your number strings. It could of course also be a method, depending on the architecture or your preferences.