I have a file named numbers.php on my ftp with the following content:
1/Brian/Red
2/Simon/Blue
3/Louise/Red
How do I get that into a table?
I need the table to show:
Brian
Simon
Loiuse
in the cells and then when you click on one of the names it takes you to a page with the colour matching the name.
I use this code when I just need to read a single line in a php file and output to textfields:
NSString *queryString = [NSString stringWithFormat: #"http://website.com/numbers.php"];
NSData *dataRequest = [NSData dataWithContentsOfURL: [ NSURL URLWithString: queryString]];
NSString *serverOutput = [[[NSString alloc] initWithData:dataRequest encoding: NSASCIIStringEncoding] autorelease];
urlTextField.text = serverOutput;
NSArray *splitString = [serverOutput componentsSeparatedByString: #"/"];
NSString *idOut = [splitString objectAtIndex: 0]; NSString *nameOut = [splitString objectAtIndex: 1]; NSString *colorOut = [splitString objectAtIndex: 2];
idTextField.text = idOut; nameTextField.text = nameOut; colorTextField.text = colorOut;
But I am a bit in doubt when it comes to multiple lines and how to get them into my table view. I assume I need to put the lines into an array?
First, I generate plist-Data on the server with the free avaliable CFPropertyList. Why, because it is verry easy to import plist-structures later.
In the app you can import data this way:
NSArray * myArray = [NSArray arrayWithContentsOfURL:[NSURL
URLWithString:#"http://url.com/foo.plist"]];
you can use NSMutableArray instead when you modifing myArray.
cheers
Related
I have a very simple xml file by name options.xml
<Dat>
<Name>Tom</Name>
<Option>1</Option>
</Dat>
Using NSXML I am trying to change "Tom" to "Jim" and save the file. How can I do that. I read many document and there is no straight forward solution. Can some one help me with the code ?
update: I ended up in trying with Gdatasxml
-(void)saveToXML
{
NSString* path = [[NSBundle mainBundle] pathForResource:#"options" ofType:#"xml"];
NSData *xmlData = [[NSMutableData alloc] initWithContentsOfFile:path];
NSError *error;
GDataXMLDocument *doc = [[GDataXMLDocument alloc] initWithData:xmlData options:0 error:&error];
GDataXMLElement *rootElement = [GDataXMLElement elementWithName:#"Dat"];
NSArray *mySettings = [doc.rootElement elementsForName:#"Dat"];
for (GDataXMLElement *mySet in mySettings)
{
NSString *name;
NSArray *names = [mySet elementsForName:#"Name"];
if (names.count > 0)
{
GDataXMLElement *childElement = (GDataXMLElement *) [names objectAtIndex:0];
name = childElement.stringValue;
NSLog(childElement.stringValue);
[childElement setStringValue:#"Jim"];
}
}
[xmlData writeToFile:path atomically:YES];
}
But this is not saving the data. Help.
Editing XML is a little difficult in iOS. You need to parse the original xml to a model and then form the xml.
You can make use of 3rd party library such as GDataXML for forming XML from a data source.
//Edited user info saved in a dictionary
NSDictionary *dictionary = #{#"Name": #"Jim", #"Option":#"1"};
GDataXMLElement *rootElement = [GDataXMLElement elementWithName:#"Dat"];
[dictionary enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
GDataXMLElement *element = [GDataXMLElement elementWithName:key stringValue:obj];
[rootElement addChild:element];
}];
//xml document is formed
GDataXMLDocument *document = [[GDataXMLDocument alloc]
initWithRootElement:rootElement];
NSData *xmlData = document.XMLData;
NSString *filePath = [self savedXMLPath];
//XML Data is written back to a filePath
[xmlData writeToFile:filePath atomically:YES];
Create a class that is essentially an XML "node". Then in your parser setup a system of these XML nodes in the same fashion as you read them. Then search through that body and find the element that you would like to change. Change it. Then write a function that goes through these "node" objects and writes a new NSString in XML format and save that string to file. There is no real easy way that I know of to write XML files. I'm sure someone has a library out there to do it, but I had very complex XML's to deal with so I wrote my own. If you would like specific code let me know and I can try to give you parts of what you may need.
You Can use GDATAXML for changing XML node
Here is Working Code snippet
NSString *XMLString = #"<Dat><Name>Tom</Name><Option>1</Option></Dat>";
NSError *error = nil;
GDataXMLElement *newElement = [[GDataXMLElement alloc] initWithXMLString: XMLString error: &error];
NSLog(#"New element: %# error: %#", newElement, error);
if(nil == error)
{
GDataXMLElement *childElement = [[newElement elementsForName: #"Name"] objectAtIndex: 0];
[childElement setStringValue:#"Jim"];
childElement = [[newElement elementsForName: #"Option"] objectAtIndex: 0];
[childElement setStringValue:#"2"];
}
NSLog(#"New element now: %#", newElement);
Check by using this code snippet
I am trying to remove just the last part of the url, Its a FTP URL.
Suppose, I have a URL like: > ftp://ftp.abc.com/public_html/somefolder/. After removing the last portion I should have it as: ftp://ftp.abc.com/public_html/.
I have tried using stringByDeletingLastPathComponenet and URLByDeletingLastPathComponent, but they dont remove the last portion correctly. They change the entire looks of the url.
for instance, after using the above said methods, here is the URL format i get ftp:/ftp.abc.com/public_html/. It removes one "/" in "ftp://", which is crashing my program.
How is it possible to removve just the last part without disturbing the rest of the URL ?
UPDATE:
NSURL * stringUrl = [NSURL URLWithString:string];
NSURL * urlByRemovingLastComponent = [stringUrl URLByDeletingLastPathComponent];
NSLog(#"%#", urlByRemovingLastComponent);
Using above code, I get the output as :- ftp:/ftp.abc.com/public_html/
Hmm. URLByDeletingLastPathComponent works perfectly given the above input.
NSURL *url = [NSURL URLWithString:#"ftp://ftp.abc.com/public_html/somefolder/"];
NSLog(#"%#", [url URLByDeletingLastPathComponent]);
returns
ftp://ftp.abc.com/public_html/
Do you have some sample code that is yielding improper results?
Max
Now try
NSString* filePath = #"ftp://ftp.abc.com/public_html/somefolder/.";
NSArray* pathComponents = [filePath pathComponents];
NSLog(#"\n\npath=%#",pathComponents);
if ([pathComponents count] > 2) {
NSArray* lastTwoArray = [pathComponents subarrayWithRange:NSMakeRange([pathComponents count]-2,2)];
NSString* lastTwoPath = [NSString pathWithComponents:lastTwoArray];
NSLog(#"\n\nlastTwoArray=%#",lastTwoPath);
NSArray *listItems = [filePath componentsSeparatedByString:lastTwoPath];
NSLog(#"\n\nlist item 0=%#",[listItems objectAtIndex:0]);
}
output
path=(
"ftp:",
"ftp.abc.com",
"public_html",
somefolder,
"."
)
lastTwoArray =somefolder/.
list item 0 =ftp://ftp.abc.com/public_html/
An example of how to extract the last part of NSURL. In this case the location of the file. Sqlite core data
NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:#"CoreAPI.sqlite"];
NSString *localPath = [storeURL absoluteString];
NSArray* pathComponents = [localPath pathComponents];
NSLog(#"%#",[pathComponents objectAtIndex:6]);
NSString * nombre = [NSString stringWithFormat:#"%#", [pathComponents objectAtIndex:6]];
This code returns me the name of the file CoreAPI.sqlite
I am using Dave DeLong's CHCSVParser to parse a csv. I can parse the csv locally, but I cannot get it load a remote csv file. I have been staring at my MacBook way too long today and the answer is right in front of me. Here is my code:
NSString *urlStr = [[NSString alloc] initWithFormat:#"http://www.somewhere.com/LunchSpecials.csv"];
NSURL *lunchFileURL = [NSURL URLWithString:urlStr];
NSStringEncoding encoding = 0;
CHCSVParser *p = [[CHCSVParser alloc] initWithContentsOfCSVFile:[lunchFileURL path] usedEncoding:&encoding error:nil];
[p setParserDelegate:self];
[p parse];
[p release];
Thanks for any help that someone can give me.
-[NSURL path] is not doing what you're expecting.
If I have the URL http://stackoverflow.com/questions/4636428, then it's -path is /questions/4636428. When you pass that path to CHCSVParser, it's going to try and open that path on the local system. Since that file doesn't exist, you won't be able to open it.
What you need to do (as Walter points out) is download the CSV file locally, and then open it. You can download the file in several different ways (+[NSString stringWithContentsOfURL:...], NSURLConnection, etc). Once you've got either the file saved locally to disk or the string of CSV in memory, you can then pass it to the parser.
If this is a very big file, then you'll want to alloc/init a CHCSVParser with the path to the local copy of the CSV file. The parser will then read through it bit by bit and tell you what it finds via the delegate callbacks.
If the CSV file isn't very big, then you can do:
NSString * csv = ...; //the NSString containing the contents of the CSV file
NSArray * rows = [csv CSVComponents];
That will return an NSArray of NSArrays of NSStrings.
Similar to this last approach is using the NSArray category method:
NSString * csv = ...;
NSError * error = nil;
NSArray * rows = [NSArray arrayWithContentsOfCSVString:csv encoding:[csv fastestEncoding] error:&error];
This will return the same structure (an NSArray of NSArrays of NSStrings), but it will also provide you with an NSError object if it encounters a syntax error in the CSV file (ie, malformed CSV).
I think you need an NSString, not an NSURL object to pass to the parser so the extra part you are doing with changing the NSString to an NSURL is the issue. Looking at the CHCSVParser documentation, it looks like he wants NSString in the init.
So maybe you could do something like:
NSError *err = [[[NSError alloc] init] autorelease];
NSString *lunchFileURL = [[NSString stringWithFormat:#"http://www.somewhere.com/LunchSpecials.csv"] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSString *lunchFile = [NSString stringWithContentsOfURL:[NSURL URLWithString:lunchFileURL] encoding:NSUTF8StringEncoding error:&err];
CHCSVParser *p = [[CHCSVParser alloc] initWithContentsOfCSVString:lunchFile usedEncoding:&encoding error:nil];
I have some source code to get the file name of an url
for example:
http://www.google.com/a.pdf
I hope to get a.pdf
because the way to join 2 NSStrings I can get is 'appendString' which only for adding a string at right side, so I planned to check each char one by one from the right side of string 'http://www.google.com/a.pdf', when it reach at the char '/', stop the checking, return string fdp.a , after that I change fdp.a to a.pdf
source codes are below
-(NSMutableString *) getSubStringAfterH : originalString:(NSString *)s0
{
NSInteger i,l;
l=[s0 length];
NSMutableString *h=[[NSMutableString alloc] init];
NSMutableString *ttt=[[NSMutableString alloc] init ];
for(i=l-1;i>=0;i--) //check each char one by one from the right side of string 'http://www.google.com/a.pdf', when it reach at the char '/', stop
{
ttt=[s0 substringWithRange:NSMakeRange(i, 1)];
if([ttt isEqualToString:#"/"])
{
break;
}
else
{
[h appendString:ttt];
}
}
[ttt release];
NSMutableString *h1=[[[NSMutableString alloc] initWithFormat:#""] autorelease];
for (i=[h length]-1;i>=0;i--)
{
NSMutableString *t1=[[NSMutableString alloc] init ];
t1=[h substringWithRange:NSMakeRange(i, 1)];
[h1 appendString:t1];
[t1 release];
}
[h release];
return h1;
}
h1 can reuturn the coorect string a.pdf, but if it returns to the codes where it was called, after a while system reports
'double free
*** set a breakpoint in malloc_error_break to debug'
I checked a long time and foudn that if I removed the code
ttt=[s0 substringWithRange:NSMakeRange(i, 1)];
everything will be Ok (of course getSubStringAfterH can not returns the corrent result I expected.), no error reported.
I try to fix the bug a few hours, but still no clue.
Welcome any comment
Thanks
interdev
The following line does the job if url is a NSString:
NSString *filename = [url lastPathComponent];
If url is a NSURL, then the following does the job:
NSString *filename = [[url path] lastPathComponent];
Try this:
Edit: from blow comment
NSString *url = #"http://www.google.com/a.pdf";
NSArray *parts = [url componentsSeparatedByString:#"/"];
NSString *filename = [parts lastObject];
I think if you have already had the NSURL object, there is lastPathComponent method available from the iOS 4 onwards.
NSURL *url = [NSURL URLWithString:#"http://www.google.com/a.pdf"];
NSString *filename = [url lastPathComponent];
Swift 3
Let's say that your url is http://www.google.com/a.pdf
let filename = url.lastPathComponent
\\filename = "a.pdf"
This is more error free and meant for getting the localized name in the URL.
NSString *localizedName = nil;
[url getResourceValue:&localizedName forKey:NSURLLocalizedNameKey error:NULL];
I haven't tried this yet, but it seems like you might be trying to do this the hard way. The iPhone libraries have the NSURL class, and I imagine that you could simply do:
NSString *url = [NSURL URLWithString:#"http://www.google.com/a.pdf"];
NSString *path = [url path];
Definitely look for a built in function. The libraries have far more testing and will handle the edge cases better than anything you or I will write in an hour or two (generally speaking).
I've got an RSS parser method and I need to remove whitespace and other nonsense from my extracted html summary. I've got a NSMutableString type 'currentSummary'. When I call:
currentSummary = [currentSummary
stringByReplacingOccurrencesOfString:#"\n" withString:#""];
Xcode tells me "warning: assignment from distinct Objective-C type"
What's wrong with this?
If currentSummary is already a NSMutableString you shouldn't attempt to assign a regular NSString (the result of stringByReplacingOccurrencesOfString:withString:) to it.
Instead use the mutable equivalent replaceOccurrencesOfString:withString:options:range:, or add a call to mutableCopy before the assignment:
// Either
[currentSummary replaceOccurencesOfString:#"\n"
withString:#""
options:NULL
range:NSMakeRange(0, [receiver length])];
// Or
currentSummary = [[currentSummary stringByReplacingOccurrencesOfString:#"\n"
withString:#""]
mutableCopy];
This works great for nested elements as well of course:
*Edited*
// Get the JSON feed from site
myRawJson = [[NSString alloc] initWithContentsOfURL:[NSURL
URLWithString:#"http://yoursite.com/mobile_list.json"]
encoding:NSUTF8StringEncoding error:nil];
// Make the content something we can use in fast enumeration
SBJsonParser *parser = [[SBJsonParser alloc] init];
NSDictionary * myParsedJson = [parser objectWithString:myRawJson error:NULL];
[myRawJson release];
allLetterContents = [myParsedJson objectForKey:#"nodes"];
// Create arrays just for the title and Nid items
self.contentTitleArray = [[NSMutableArray alloc]init];
for (NSMutableDictionary * key in myArr) {
NSDictionary *node = [key objectForKey:#"node"];
NSMutableString *savedContentTitle = [node objectForKey:#"title"];
// Add each Title and Nid to specific arrays
//[self.contentTitleArray addObject:contentTitle];
//change each item with & to &
[self.contentTitleArray addObject:[[savedContentTitle
stringByReplacingOccurrencesOfString:#"&"
withString:#"&"]
mutableCopy]];
}
The code below, as shown in the use-case above might be helpful.
[self.contentTitleArray addObject:[[contentTitle
stringByReplacingOccurrencesOfString:#"&"
withString:#"&"]
mutableCopy]];
That usually means you dropped the asterisks in the definition of (in this case) currentSummary.
So you most likely have:
NSMutableString currentSummary;
when you need:
NSMutableString *currentSummary;
In the first case, since Objective-C classes are defined in type structures, the complier thinks your trying to assign a NSString to a struct.
I make this typo on a distressingly regular basis.