here is xml
Root--->
Subject--->
SubjectID 1 /SubjectID
SubjectName MatheMatics /SubjectName
Sub_Subject---->
Sub_SubjectID 1 /Sub_SubjectID
Sub_SubjectName Calculus /Sub_SubjectName
/Sub_Subject
Sub_Subject
Sub_SubjectID 2 /Sub_SubjectID
Sub_SubjectName Geometry /Sub_SubjectName
/Sub_Subject
/Subject
Subject---->
SubjectID 2 /SubjectID
SubjectName Physics /SubjectName
/Subject
/Root
in app i want to show subject name in tableviewcontroller when application launch & when we clicked on tableviewcell it leads on another table view which shows sub_subject list.
how to achieve this
for that.
+ (NSString *)dataFilePath:(BOOL)forSave {
return [[NSBundle mainBundle] pathForResource:#"SubjectData" ofType:#"xml"];
}
+ (RootSubject *)loadParty {
NSString *filePath = [self dataFilePath:FALSE];
NSData *xmlData = [[NSMutableData alloc] initWithContentsOfFile:filePath];
NSError *error;
GDataXMLDocument *doc = [[GDataXMLDocument alloc] initWithData:xmlData
options:0 error:&error];
/* if (doc == nil) { return nil; }
NSLog(#"%#", doc.rootElement);
[doc release];
[xmlData release];
return nil;*/
RootSubject *rootSubject = [[[RootSubject alloc] init] autorelease];
NSArray *partyMembers = [doc nodesForXPath:#"//Root/Subject" error:nil];
//NSArray *patry = [doc nodesForXPath:#"//Root/Subject/SunjectID" error:nil];
for (GDataXMLElement *partyMember in partyMembers) {
// Let's fill these in!
NSString *subjectId, *subjectName, *sub_SubjectId, *sub_SubjectName;
// senderName
NSArray *subjectIds = [partyMember elementsForName:#"SubjectID"];
if (subjectIds.count > 0) {
GDataXMLElement *firstName = (GDataXMLElement *) [subjectIds objectAtIndex:0];
subjectId = firstName.stringValue;
} else continue;
// senderEmail
NSArray *subjectNames = [partyMember elementsForName:#"SubjectName"];
if (subjectNames.count > 0) {
GDataXMLElement *firstLevel = (GDataXMLElement *) [subjectNames objectAtIndex:0];
subjectName = firstLevel.stringValue;
} else continue;
/* //senderPhone
NSArray *sub_SubjectIds = [partyMember elementsForName:#"Sub_SubjectID"];
if (sub_SubjectIds.count > 0) {
GDataXMLElement *firstName = (GDataXMLElement *) [sub_SubjectIds objectAtIndex:0];
sub_SubjectId = firstName.stringValue;
} else continue;
//senderLocation
NSArray *sub_SubjectNames = [partyMember elementsForName:#"Sub_SubjectName"];
if (sub_SubjectNames.count > 0) {
GDataXMLElement *firstName = (GDataXMLElement *) [sub_SubjectNames objectAtIndex:0];
sub_SubjectName = firstName.stringValue;
} else continue;*/
//Subject *subject = [[[Subject alloc]initWithSubjectId:subjectId subjectName:subjectName sub_SubjectId:sub_SubjectId sub_SubjectName:sub_SubjectName]autorelease];
Subject *subject = [[[Subject alloc]initWithSubjectId:subjectId subjectName:subjectName sub_SubjectId:nil sub_SubjectName:nil]autorelease];
//Subject *subject = [[[Subject alloc]initWithSubjectId:subjectId subjectName:nil sub_SubjectId:sub_SubjectId sub_SubjectName:sub_SubjectName]autorelease];
//[rootGroup.groups addObject:group];
[rootSubject.subjects addObject:subject];
}
[doc release];
[xmlData release];
return rootSubject;
}
through this we get subject name and show it perfectly in tableviewcontroller but when i clicked on particular subject which provides subsubject in another view controller
Here is a good tutorial that shows XML parsing using GDataXMLParser.
how-to-read-and-write-xml-documents-with-gdataxml
Related
Hello I am parsing a RSS And Atom feeds, and my question is how can I check for < img > and < url > tags in < description >?
There must be some sort of check. Thanks.
Here is how I parse them:
- (NSArray *)parseFeed:(NSURL *)feedURL{
NSError *error;
NSData *data = [NSData dataWithContentsOfURL:feedURL];
GDataXMLDocument *xmlParse = [[GDataXMLDocument alloc] initWithData:data error:&error];
GDataXMLElement *rootElement = xmlParse.rootElement;
NSArray *array = [[NSArray alloc] init];
if ([rootElement.name compare:#"rss"] == NSOrderedSame) {
array = [self parseRSSFeed:rootElement];
return array;
} else if ([rootElement.name compare:#"feed"] == NSOrderedSame) {
array = [self parseAtomFeed:rootElement];
return array;
} else {
NSLog(#"Unsupported root element: %#", rootElement.name);
return nil;
}
}
-(NSArray *)parseRSSFeed:(GDataXMLElement *) rootElement
{
NSMutableArray *entries = [[NSMutableArray alloc] init];
NSArray *channels = [rootElement elementsForName:#"channel"];
for (GDataXMLElement *channel in channels) {
NSArray *items = [channel elementsForName:#"item"];
for (GDataXMLElement *item in items) {
FeedItem *itemF = [[FeedItem alloc] init];
itemF.title = [item valueForChild:#"title"];
itemF.description = [item valueForChild:#"description"];
NSLog(#"IMAGE - %#", [item valueForChild:#"img"]);
itemF.dateString = [item valueForChild:#"pubDate"];
itemF.link = [NSURL URLWithString:[item valueForChild:#"link"]];
itemF.dateString = [item valueForChild:#"updated"];
itemF.author = [item valueForChild:#"author"];
[entries addObject:itemF];
NSLog(#"RSS - %#", itemF.title);
}
}
NSArray *RSSArray = [entries copy];
return RSSArray;
}
-(NSArray *)parseAtomFeed:(GDataXMLElement *) rootElement
{
NSMutableArray *entries = [[NSMutableArray alloc] init];
NSArray *entry = [rootElement elementsForName:#"entry"];
for (GDataXMLElement *entryElement in entry) {
// NSArray *items = [channel elementsForName:#"item"];
//for (GDataXMLElement *item in items) {
FeedItem *itemF = [[FeedItem alloc] init];
itemF.title = [entryElement valueForChild:#"title"];
itemF.description = [entryElement valueForChild:#"summary"];
NSArray *links = [entryElement elementsForName:#"link"];
for (GDataXMLElement *link in links) {
itemF.link = [NSURL URLWithString:[[link attributeForName:#"href"] stringValue]];
}
itemF.dateString = [entryElement valueForChild:#"updated"];
NSArray *authors = [entryElement elementsForName:#"author"];
for (GDataXMLElement *authorElement in authors) {
itemF.author = [authorElement valueForChild:#"name"];
}
[entries addObject:itemF];
NSLog(#"Atom - %#", itemF.title);
}
NSArray *atomArray = [entries copy];
return atomArray;
}
I am parsing them using GDataXMLParser, and my own parser class.
Do it like this:
NSString *Str=[item valueForChild:#"description"];
NSArray *tmp=[Str componentsSeparatedByString:#"<Img>"];
if([tmp count]>1){
NSString *urlstr=[[tmp objectatindex:1] stringByReplacingOccurrencesOfString:#" </Img>" withString:#""];
}
Now urlstr contains your image url.
Enjoy
I thought that
itemF.description = [item valueForChild:#"description"];
is NSString. So you can use componentsSeparatedByString with "your tag".
It will return array. In array at postion 1 you will get your img url.
This url has closing bracket "your closing tag".
Replace "your closing tag" with space. You will get image url.
Hope, this will help you.
I need to extract a variable's value from a string, which happens to be a URL. The string/url is loaded as part of a separate php query, not the url in the browser.
The url's will look like:
http://gmail.com?access_token=ab8w4azq2xv3dr4ab37vvzmh&token_type=bearer&expires_in=3600
How can I capture the value of the access_token which in this example is ab8w4azq2xv3dr4ab37vvzmh?
This code should do it:
- (NSString *)extractToken:(NSURL *)URL
{
NSString *urlString = [URL absoluteString];
NSRange start = [urlString rangeOfString:#"access_token="];
if (start.location != NSNotFound)
{
NSString *token = [urlString substringFromIndex:start.location+start.length];
NSRange end = [token rangeOfString:#"&"];
if (end.location != NSNotFound)
{
//trim off other parameters
token = [token substringToIndex:end.location];
}
return token;
}
//not found
return nil;
}
Alternatively, here is a more general solution that will extract all the query parameters into a dictionary:
- (NSDictionary *)URLQueryParameters:(NSURL *)URL
{
NSString *queryString = [URL query];
NSMutableDictionary *result = [NSMutableDictionary dictionary];
NSArray *parameters = [queryString componentsSeparatedByString:#"&"];
for (NSString *parameter in parameters)
{
NSArray *parts = [parameter componentsSeparatedByString:#"="];
NSString *key = [[parts objectAtIndex:0] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
if ([parts count] > 1)
{
id value = [[parts objectAtIndex:1] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
[result setObject:value forKey:key];
}
}
return result;
}
Good Category for NSDictionary:
#import "NSDictionary+URL.h"
#implementation NSDictionary (URL)
+ (NSDictionary *)dictionaryWithUrlString:(NSString *)urlString{
NSRange urlRange = [urlString rangeOfString:#"?"];
if(urlRange.length>0){
urlString = [urlString substringFromIndex:urlRange.length+urlRange.location];
}
NSArray *pairsArray = [urlString componentsSeparatedByString:#"&"];
NSMutableDictionary *parametersDictionary = [[NSMutableDictionary alloc] initWithCapacity:[pairsArray count]];
for(NSString *pairString in pairsArray){
NSArray *valuesArray = [pairString componentsSeparatedByString:#"="];
if([valuesArray count]==2){
[parametersDictionary setValue:[valuesArray objectAtIndex:1] forKey:[valuesArray objectAtIndex:0]];
}
}
return [parametersDictionary autorelease];
}
#end
NSMutableDictionary *querycomponent = [[NSMutableDictionary alloc] init];
if (![query isEqualToString:#""]){
NSArray *queryArray = [query componentsSeparatedByString:#"&"];
for (NSString *subquery in queryArray){
NSArray *subqueryArray = [subquery componentsSeparatedByString:#"="];
NSString *key = [subqueryArray objectAtIndex:0];
NSString *val = [subqueryArray objectAtIndex:1];
[querycomponent setObject:val forKey:key];
}
NSLog(#"querycomponent %#",querycomponent);
}
it shows me warning that initWithDocPath not found when i want to get private directory content..
+ (NSMutableArray *)loadScaryBugDocs {
NSString *documentsDirectory = [VideoDatabase getPrivateDocsDir];
NSError *error;
NSArray *files =[NSFileManagerdefaultManager]contentsOfDirectoryAtPath:documentsDirectory error:&error];
if (files == nil) {
return nil;
}
NSMutableArray *retval = [NSMutableArray arrayWithCapacity:files.count];
for (NSString *file in files) {
if ([file.pathExtension compare:#"scarybug" options:NSCaseInsensitiveSearch] == NSOrderedSame) {
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:file];
VideoNotepadViewController *doc = [[[VideoNotepadViewController alloc] initWithDocPath:fullPath] autorelease];
//shows warning here
[retval addObject:doc];
}
}
return retval;
}
You need to implement the initWithDocPath: method in VideoNotepadViewController. Apple doesn't provide a method by that name.
I am not able to find a way to remove a leak detected by leaks tool.
Here is my problem...
I have a singleton object in my delegate which stores data on a global level. Now, I have a array of objects which i maintain here and add or modify it from controllers.
Below is a function which fills the objects and sets the above global array,
Now, the highlighted lines(marked by //LEAK) are where the leaks tool tell me its a leak. I require this array for my session. I release the array at the end when i logout.
Should i be worried about this kind leak?
-(LayoutInfo *) fillLayout: (GDataXMLElement *) layoutElement {
LayoutInfo *layout = [[LayoutInfo alloc] init];
layout.dataTableCount = 0;
layout.chartsCount = 0;
NSArray *templateNameArr = [layoutElement elementsForName:#"TemplateName"];
NSMutableArray *chartElements = [[NSMutableArray alloc] init]; // LEAK
NSMutableArray *dtElements = [[NSMutableArray alloc] init];
NSArray *charts = [layoutElement elementsForName:#"chart"]; // LEAK
if (charts.count > 0) {
for (GDataXMLElement *singleChart in charts) {
chart *chartInfo = [[chart alloc] init]; // LEAK
layout.chartsCount = layout.chartsCount + 1;
NSArray *imageName = [singleChart elementsForName:#"imageName"];
if (imageName.count > 0) {
GDataXMLElement *imageNameStr = (GDataXMLElement *) [imageName objectAtIndex:0];
chartInfo.imageName = imageNameStr.stringValue; // LEAK
}
NSArray *imagePath = [singleChart elementsForName:#"imagePath"];
if (imagePath.count > 0) {
GDataXMLElement *imagePathStr = (GDataXMLElement *) [imagePath objectAtIndex:0];
chartInfo.imagePath = imagePathStr.stringValue; // LEAK
}
NSArray *imageFileName = [singleChart elementsForName:#"imageFileName"];
if (imageFileName.count > 0) {
GDataXMLElement *imageFileNameStr = (GDataXMLElement *) [imageFileName objectAtIndex:0];
chartInfo.imageFileName = imageFileNameStr.stringValue;
}
ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:chartInfo.imagePath]];
[request setDownloadDestinationPath:[[NSHomeDirectory() stringByAppendingPathComponent:#"Documents"]
stringByAppendingPathComponent:chartInfo.imageFileName]];
[request setDidFinishSelector:#selector(fillLayout_requestDone:)];
[request setDidFailSelector:#selector(fillLayout_requestWentWrong:)];
[request startSynchronous];
NSString *imagePath1 = [[NSHomeDirectory() stringByAppendingPathComponent:#"Documents"] stringByAppendingPathComponent:chartInfo.imageFileName];
if([[NSFileManager defaultManager] fileExistsAtPath:imagePath1]) {
NSLog(#" --- IMAGE SAVED -- %#", imagePath1);
}
[chartElements addObject:chartInfo];
} //for
layout.chartElement = chartElements; // THIS IS WHERE I ASSIGN THE GLOBAL ARRAY
//[chartElements release];
}
return layout;
}
-(LayoutInfo *) fillLayout: (GDataXMLElement *) layoutElement {
LayoutInfo *layout = [[LayoutInfo alloc] init];
layout.dataTableCount = 0;
layout.chartsCount = 0;
NSArray *templateNameArr = [layoutElement elementsForName:#"TemplateName"];
NSMutableArray *chartElements = [[NSMutableArray alloc] init]; // LEAK
//NSMutableArray *dtElements = [[NSMutableArray alloc] init];
NSArray *charts = [layoutElement elementsForName:#"chart"]; // LEAK
if (charts.count > 0) {
for (GDataXMLElement *singleChart in charts) {
chart *chartInfo = [[chart alloc] init]; // LEAK
layout.chartsCount = layout.chartsCount + 1;
NSArray *imageName = [singleChart elementsForName:#"imageName"];
if (imageName.count > 0) {
GDataXMLElement *imageNameStr = (GDataXMLElement *) [imageName objectAtIndex:0];
chartInfo.imageName = imageNameStr.stringValue; // LEAK
}
NSArray *imagePath = [singleChart elementsForName:#"imagePath"];
if (imagePath.count > 0) {
GDataXMLElement *imagePathStr = (GDataXMLElement *) [imagePath objectAtIndex:0];
chartInfo.imagePath = imagePathStr.stringValue; // LEAK
}
NSArray *imageFileName = [singleChart elementsForName:#"imageFileName"];
if (imageFileName.count > 0) {
GDataXMLElement *imageFileNameStr = (GDataXMLElement *) [imageFileName objectAtIndex:0];
chartInfo.imageFileName = imageFileNameStr.stringValue;
}
ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:chartInfo.imagePath]];
[request setDownloadDestinationPath:[[NSHomeDirectory() stringByAppendingPathComponent:#"Documents"]
stringByAppendingPathComponent:chartInfo.imageFileName]];
[request setDidFinishSelector:#selector(fillLayout_requestDone:)];
[request setDidFailSelector:#selector(fillLayout_requestWentWrong:)];
[request startSynchronous];
NSString *imagePath1 = [[NSHomeDirectory() stringByAppendingPathComponent:#"Documents"] stringByAppendingPathComponent:chartInfo.imageFileName];
if([[NSFileManager defaultManager] fileExistsAtPath:imagePath1]) {
NSLog(#" --- IMAGE SAVED -- %#", imagePath1);
}
[chartElements addObject:chartInfo];
[chartInfo release]; // it's retained in chartElements until removed, or until chartElements is deallocced
} //for
if(layout.charElement){
[layout.charElement release]; // you should however consider in making charElement property as retain;
layout.charElement = nil; // this isn't required here (since you're assigning it a new value), but you should usually set it to nil after a release to prevent EXC_BADACCESS
}
layout.chartElement = chartElements; // THIS IS WHERE I ASSIGN THE GLOBAL ARRAY
//[chartElements release];
}
return [layout autorelease]; // in case you don't want it autoreleased you should call your method something like: createFilledLayout ('create' is usually used so anyone that uses the method knows it's responsible for releasing the return value)
}
you should have a look at Memory Management Programming Guide
How can I parse a mailto request ?
'mailto:someone#example.com?cc=someone_else#example.com&subject=This%20is%20the%20subject&body=This%20is%20the%20body'
From this NSURL, I want to extract the recipient, the subject and the body. How should I do ?
Thanks
Here is some code that will parse any URL and return a dictionary with the parameters and the associated objects in a dictionary. It works for mailto URLs, too.
Please note: This code assumes you're using ARC!
#interface NSString (URLDecoding)
- (NSString *) URLDecodedString;
#end
#implementation NSString (URLDecoding)
- (NSString *) URLDecodedString {
NSString *result = (__bridge_transfer NSString *)CFURLCreateStringByReplacingPercentEscapesUsingEncoding(kCFAllocatorDefault, (__bridge CFStringRef)self, CFSTR(""), kCFStringEncodingUTF8);
return result;
}
#end
- (NSDictionary *) parameterDictionaryFromURL:(NSURL *)url {
NSMutableDictionary *parameterDictionary = [[NSMutableDictionary alloc] init];
if ([[url scheme] isEqualToString:#"mailto"]) {
NSString *mailtoParameterString = [[url absoluteString] substringFromIndex:[#"mailto:" length]];
NSUInteger questionMarkLocation = [mailtoParameterString rangeOfString:#"?"].location;
[parameterDictionary setObject:[mailtoParameterString substringToIndex:questionMarkLocation] forKey:#"recipient"];
if (questionMarkLocation != NSNotFound) {
NSString *parameterString = [mailtoParameterString substringFromIndex:questionMarkLocation + 1];
NSArray *keyValuePairs = [parameterString componentsSeparatedByString:#"&"];
for (NSString *queryString in keyValuePairs) {
NSArray *keyValuePair = [queryString componentsSeparatedByString:#"="];
if (keyValuePair.count == 2)
[parameterDictionary setObject:[[keyValuePair objectAtIndex:1] URLDecodedString] forKey:[[keyValuePair objectAtIndex:0] URLDecodedString]];
}
}
}
else {
NSString *parameterString = [url parameterString];
NSArray *keyValuePairs = [parameterString componentsSeparatedByString:#"&"];
for (NSString *queryString in keyValuePairs) {
NSArray *keyValuePair = [queryString componentsSeparatedByString:#"="];
if (keyValuePair.count == 2)
[parameterDictionary setObject:[[keyValuePair objectAtIndex:1] URLDecodedString] forKey:[[keyValuePair objectAtIndex:0] URLDecodedString]];
}
}
return [parameterDictionary copy];
}
And here is how you use it:
NSURL *mailtoURL = [NSURL URLWithString:#"mailto:foo#example.com?cc=bar#example.com&subject=Greetings%20from%20Cupertino!&body=Wish%20you%20were%20here!"];
NSDictionary *parameterDictionary = [self parameterDictionaryFromURL:mailtoURL];
NSString *recipient = [parameterDictionary objectForKey:#"recipient"];
NSString *subject = [parameterDictionary objectForKey:#"subject"];
NSString *body = [parameterDictionary objectForKey:#"body"];
EDIT:
I updated the code to work with any URL and recipients are now in the dictionary for mailto URLs.
I would pull the email from that like this:
NSString * mailToString = #"'mailto:someone#example.com?cc=someone_else#example.com&subject=This%20is%20the%20subject&body=This%20is%20the%20body'";
NSArray *tempArray = [mailToString componentsSeparatedByString:#"?"];
//get email address from array
NSString * emailString = [[tempArray objectAtIndex:0]description];
//clean up string
emailString = [emailString stringByReplacingOccurrencesOfString:#"'mailto:" withString:#""];
//and here is your email string
NSLog(#"%#",emailString);
Since iOS 7 this is easily doable with NSURLComponents. You can create that object with:
if let components = NSURLComponents(URL: url, resolvingAgainstBaseURL:false) { ...
Then you can get the recipient accessing the path property of NSURLComponents; and the parameters with the queryItems property. For instance, if we wanted to get the subject, something like this would do our job
let queryItems = components.queryItems as? [NSURLQueryItem]
let subject = queryItems?.filter({$0.name == "subject"}).first?.value
NSURL category for just mailto: This method also has a fix for a crash bug in Fabian's answer above when mailto: url doesn't contain a ?. It also doesn't require the URLDecodedString category method.
#implementation NSURL (Additions)
- (NSDictionary *) parameterDictionaryForMailTo {
NSMutableDictionary *parameterDictionary = [[NSMutableDictionary alloc] init];
NSString *mailtoParameterString = [[self absoluteString] substringFromIndex:[#"mailto:" length]];
NSUInteger questionMarkLocation = [mailtoParameterString rangeOfString:#"?"].location;
if (questionMarkLocation != NSNotFound) {
[parameterDictionary setObject:[mailtoParameterString substringToIndex:questionMarkLocation] forKey:#"recipient"];
NSString *parameterString = [mailtoParameterString substringFromIndex:questionMarkLocation + 1];
NSArray *keyValuePairs = [parameterString componentsSeparatedByString:#"&"];
for (NSString *queryString in keyValuePairs) {
NSArray *keyValuePair = [queryString componentsSeparatedByString:#"="];
if (keyValuePair.count == 2)
[parameterDictionary setObject:[[keyValuePair objectAtIndex:1] stringByRemovingPercentEncoding] forKey:[[keyValuePair objectAtIndex:0] stringByRemovingPercentEncoding]];
}
}
else {
[parameterDictionary setObject:mailtoParameterString forKey:#"recipient"];
}
return [parameterDictionary copy];
}
- (NSDictionary *) parameterDictionaryFromURL:(NSURL *)url {
NSMutableDictionary *parameterDictionary = [[NSMutableDictionary alloc] init];
NSURLComponents * urlComponents = [NSURLComponents componentsWithString:url.absoluteString];
for (NSURLQueryItem *item in urlComponents.queryItems) {
parameterDictionary[item.name] = item.value;
}
if ([url.scheme isEqualToString:#"mailto"]) {
NSUInteger questionMarkLocation = [url.resourceSpecifier rangeOfString:#"?"].location;
if (questionMarkLocation == NSNotFound) {
parameterDictionary[#"recipient"] = url.resourceSpecifier;
} else {
parameterDictionary[#"recipient"] = [url.resourceSpecifier substringToIndex:questionMarkLocation];
}
}
return [parameterDictionary copy];
}