What I am doing is in my Parse query, I check to see which posts have been check marked (liked) in the last 7 days. I then remove the dates of those that haven't. This is working fine. Now my problem is that I need to sort them in my UITableView in descending order of how many dates are in the array but my sortedArrayUsingComparator isn't working. Im new to Objective C so its probably something easy but idk. Here's my code
- (PFQuery *)queryForParse {
PFQuery *query1 = [PFQuery queryWithClassName:self.parseClassName];
//[query1 selectKeys: [NSArray arrayWithContentsOfFile:[ NSString #"checkMark"]]];
[query1 whereKey:#"location" nearGeoPoint:[PFGeoPoint geoPointWithLatitude:[LocationController sharedSingleton].locationManager.location.coordinate.latitude longitude:[LocationController sharedSingleton].locationManager.location.coordinate.longitude] withinMiles:50];
[query1 findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error){
placesArray = [[NSMutableArray alloc] initWithArray:objects];
NSMutableArray *toDelete = [NSMutableArray array];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyyMMdd"];
for (PFObject *tempObject in placesArray){
checkDates = [[NSMutableArray alloc] initWithArray:[tempObject objectForKey:#"checkMarkDates"]];
for (NSString *dateString in checkDates) {
NSDate *date = [dateFormat dateFromString: dateString];
if ([date timeIntervalSinceNow] > -604800){
[toDelete addObject:dateString];
}
}
[checkDates removeObjectsInArray:toDelete];
[tempObject removeObjectsInArray:checkDates forKey:#"checkMarkDates"];
sortedArray = [placesArray sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {
NSUInteger *first = [[obj1 objectForKey:#"checkMarkDates"] count];
NSNumber *f = [[NSNumber alloc] initWithInteger:first];
NSUInteger *second = [[obj2 objectForKey:#"checkMarkDates"] count];
NSNumber *s = [[NSNumber alloc] initWithInteger:second];
return [f compare:s];
}];
}
NSLog(#"%#", sortedArray);
}
[placesTable reloadData];
}];
return query1;
}
Figured it out. I had the sortedArrayUsingComparator in the for statement. I moved it out and it works fine now.
Related
In my project i am adding many words to a list from another view controller and i need to check that the words cannot be same in the list.
Here is the code ,please help where i need to do that
-(IBAction)save:(id)sender{
if ([listName.text isEqualToString:#""]) {
UIAlertView *error = [[UIAlertView alloc] initWithTitle:nil message:#"Please enter List Name." delegate:self cancelButtonTitle:#"Ok" otherButtonTitles: nil];
[error show];
} else if (self.newlist) {
if (listName.text.length > 0 ) {
[[UIApplication sharedApplication] cancelAllLocalNotifications];
NSDate *currDate = [NSDate date];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
[dateFormatter setDateFormat:#"YYYY-MM-dd"];
NSString *dateString = [dateFormatter stringFromDate:currDate];
if (notification.on ) {
NSString *dateStr = [[NSString alloc] initWithFormat:#"%# %#",dateString, time.text ];
[self saveList:dateStr:dateString];
[self saveListImages];
[self getlistdata];
}else {
[self saveList:#"2000-01-01 00:00":dateString];
}
}else{
[listName becomeFirstResponder];
}
}
}
Add your string in a mutable array and call below comparator to check for duplicates. Below code ensures case insensitive checks so it won't allow TEST and test go in the same array.
NSMutableArray *myArray = [NSMutableArray arrayWithArray:#[#"TEST", #"Data"]];
NSString *testString = #"Test";
NSInteger index = [myArray indexOfObjectPassingTest:^BOOL(id obj, NSUInteger idx, BOOL *stop) {
return (BOOL)([obj caseInsensitiveCompare:testString] == NSOrderedSame);
}];
if (index != NSNotFound) {
NSLog(#"String already entered. Throw error");
} else {
[myArray addObject:testString];
}
NSOrderedSet *uniqueWordSet = [NSOrderedSet orderedSetWithArray:arrayWithDuplicates];
NSArray *unwiqueWordList = uniqueWordSet.array; // If you need it as array
I am writing an app for students at my university. At this point I want to export the lessons in the schedule as an ics-file. I have wrote something that works with csv-files, but now I want the same for ics.
The problem is that iCal at my Mac doesn't want the in-app-created ics-files from this code:
-(NSURL*)getFileUrl
{
NSString *docsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *filePath = [docsPath stringByAppendingPathComponent:[NSString stringWithFormat:#"Stundenplan-%#.ics", _MatrNr]];
NSURL *fileUrl = [NSURL fileURLWithPath:filePath];
NSError *error = nil;
[[self getICSData] writeToURL:fileUrl atomically:YES];
if (error) {
NSLog(#"Error while writing to File: %#", [error localizedDescription]);
}
return fileUrl;
}
-(NSData*)getICSData
{
NSMutableString *erg = [[NSMutableString alloc] init];
NSDate *aktDatum = [NSDate date];
[erg appendString:[NSString stringWithFormat:#"BEGIN:VCALENDAR\nVERSION:2.0\nPRODID:-//www.htw-dresden.de//iOS//DE\nMETHOD:PUBLISH\n"]];
for (Stunde *this in _daten) {
NSString *titel = [this.titel stringByReplacingOccurrencesOfString:#"," withString:#"\\, "];
NSString *dozent = [this.dozent stringByReplacingOccurrencesOfString:#"," withString:#"\\, "];
NSString *uuid = [[NSUUID UUID] UUIDString];
[erg appendString:[NSString stringWithFormat:#"BEGIN:VEVENT\nUID:%#\n", uuid]];
[erg appendString:[NSString stringWithFormat:#"DTSTART:%#T%#Z\n",[self nurTagFromDate:this.anfang], [self nurUhrzeigFromDate:this.anfang]]];
[erg appendString:[NSString stringWithFormat:#"DTEND:%#T%#Z\n",[self nurTagFromDate:this.ende], [self nurUhrzeigFromDate:this.ende]]];
[erg appendString:[NSString stringWithFormat:#"LAST-MODIFIED:%#T%#Z\nSEQUENCE:0\nSTATUS:CONFIRMED\n", [self nurTagFromDate:aktDatum], [self nurUhrzeigFromDate:aktDatum]]];
[erg appendString:[NSString stringWithFormat:#"SUMMARY:%#\nDESCRIPTION:%#\nLOCATION:%#\nEND:VEVENT\n", titel, dozent, this.raum]];
}
[erg appendString:#"END:VCALENDER"];
NSData *ret = [erg dataUsingEncoding:NSUTF8StringEncoding];
return ret;
}
In the getFileUrl I want to return a URL to the file created in there. This function calls the getICSData function that goes through my array (_daten) and creates for every Stunde object this ics-"code".
For help I have these NSDate formatting functions:
-(NSString*)nurTagFromDate:(NSDate*)date
{
NSDateFormatter *nurTag = [[NSDateFormatter alloc] init];
[nurTag setDateFormat:#"yyyyMMdd"];
return [nurTag stringFromDate:date];
}
-(NSString*)nurUhrzeigFromDate:(NSDate*)date
{
NSDateFormatter *nurTag = [[NSDateFormatter alloc] init];
[nurTag setDateFormat:#"HHmmss"];
return [nurTag stringFromDate:date];
}
As output I get something like this:
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//www.htw-dresden.de//iOS//DE
METHOD:PUBLISH
BEGIN:VEVENT
UID:CCCAC9B3-E056-47E3-A63B-F2FE2C3BA454
DTSTART:20140318T111000Z
DTEND:20140318T124000Z
LAST-MODIFIED:20140429T182723Z
SEQUENCE:0
STATUS:CONFIRMED
SUMMARY:Internet-Technologien I
DESCRIPTION:Vogt\, J.
LOCATION:Z 254
END:VEVENT
.
.
.
END:VCALENDER
But the calendar app at my Mac don't want to open the file...
It would be great if some of you will have an Idea :)
Replace this line:
[erg appendString:#"END:VCALENDER"];
With this:
[erg appendString:#"END:VCALENDAR"];
Notice the typo in VCALENDAR.
You may find this iCal file validator useful.
I have a NSMutableArray with dictionaries, all of the dict's contain a NSDate is form of NSString with key 'Date'. I want to sort the NSDictionaries by the Dates. So for example i have the following state of the array:
Dict
Date
20.06.1996 23:30
Dict
Date
04.10.2011 19:00
Dict
Date
20.06.1956 23:39
And I want to sort it, so that it looks like this:
Dict
Date
20.06.1956 23:39
Dict
Date
20.06.1996 23:30
Dict
Date
04.10.2011 19:00
I have already experimented with NSSortDescriptor, but without success...
Update:
I have managed to sort the dates, but I came to this problem: In the dicts there is not only dates, also other objects, and what my code does is it only switches the date values between the dicts, instead of switching the complete dicts around. With this, the other values in the dicts get assigned a wrong date, which is very bad. Can anybody help me? Heres my code:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"savedData.daf"];
NSMutableArray *d = [NSMutableArray arrayWithContentsOfFile:path];
for (int ii = 0; ii < [d count]; ii++) {
NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
if (is24h) {
[dateFormatter setDateFormat:#"dd.MM.yyyy HH:mm"];
}
else {
[dateFormatter setDateFormat:#"dd.MM.yyyy hh:mm a"];
}
[dateFormatter setLocale:[NSLocale currentLocale]];
NSDate *dat = [dateFormatter dateFromString:[[d valueForKey:#"Date"] objectAtIndex:ii]];
NSMutableDictionary *newDict = [[NSMutableDictionary alloc] init];
NSDictionary *oldDict = (NSDictionary *)[d objectAtIndex:ii];
[newDict addEntriesFromDictionary:oldDict];
[newDict setObject:dat forKey:#"Date"];
[d replaceObjectAtIndex:ii withObject:newDict];
[newDict release];
}
NSSortDescriptor *sorter = [[NSSortDescriptor alloc] initWithKey:#"Date" ascending:YES];
NSArray *sorters = [[NSArray alloc] initWithObjects:sorter, nil];
[sorter release];
NSMutableArray *sorted = [NSMutableArray arrayWithArray:[d sortedArrayUsingDescriptors:sorters]];
[sorters release];
NSLog(#"%#",sorted);
for (int ii = 0; ii < [sorted count]; ii++) {
NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
if (is24h) {
[dateFormatter setDateFormat:#"dd.MM.yyyy HH:mm"];
}
else {
[dateFormatter setDateFormat:#"dd.MM.yyyy hh:mm a"];
}
[dateFormatter setLocale:[NSLocale currentLocale]];
NSString *sr = [dateFormatter stringFromDate:[[sorted valueForKey:#"Date"] objectAtIndex:ii]];
NSMutableDictionary *newDict = [[NSMutableDictionary alloc] init];
NSDictionary *oldDict = (NSDictionary *)[d objectAtIndex:ii];
[newDict addEntriesFromDictionary:oldDict];
[newDict setObject:sr forKey:#"Date"];
[sorted replaceObjectAtIndex:ii withObject:newDict];
[newDict release];
}
NSLog(#"before: %#"
""
"after: %#",d,sorted);
[sorted writeToFile:path atomically:YES];
There are many ways to do this, one would be to use NSDate objects instead of NSStrings (or NSStrings formatted according to ISO 8601, so that the lexicographic sort would match the desired sorting). Then you could do:
NSSortDescriptor *descriptor = [NSSortDescriptor sortDescriptorWithKey:#"Date"
ascending:YES];
[array sortUsingDescriptors:[NSArray arrayWithObject:descriptor]];
Or, if you can't (or don't want to) change your data, you can always sort using a block:
[array sortUsingComparator:^(id dict1, id dict2) {
NSDate *date1 = // create NSDate from dict1's Date;
NSDate *date2 = // create NSDate from dict2's Date;
return [date1 compare:date2];
}];
Of course this would probably be slower than the first approach since you'll usually end up creating more than n NSDate objects.
There are a couple of options, one is to put NSDate objects in the dictionary.
One problem with comparing the strings is that you can 't just do a string compare because the year is not in the most significant potion of the string.
So, you will need to write a comparison method to use with:
- (NSArray *)sortedArrayUsingComparator:(NSComparator)cmptr
or perhaps:
- (NSArray *)sortedArrayUsingFunction:(NSInteger (*)(id, id, void *))comparator context:(void *)context
The comparator will need to handle the dd.mm.yyyy hh:mm string format.
Other options include adding another dictionary key with an NSDate representation and sorting on that.
I wonder if it is possible to fill rangeOfString objects of a NSArray. Because I have a long list of objects for after rangeOfString:
NSArray biglist´s count is higher than list´s count.
I want to filter away the objects from the small list of the main list.
Please tell me if this is not clear.
My codes below:
NSArray *biglist = [[NSArray alloc] initWithArray:
[[NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:#"mainlist" ofType:#"txt"]
encoding:NSUTF8StringEncoding error:NULL] componentsSeparatedByString:#"\n"]];
NSArray *list = [[NSArray alloc] initWithArray:
[[NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:#"smalllist" ofType:#"txt"]
encoding:NSUTF8StringEncoding error:NULL] componentsSeparatedByString:#"\n"]];
for (NSString *listword in list);
NSMutableArray *wordlist = [[NSMutableArray alloc] init];
NSMutableArray *worindex = [[NSMutableArray alloc] init];
NSMutableIndexSet *mindexes = [[NSMutableIndexSet alloc] init];
NSMutableDictionary *mutdic = [[NSMutableDictionary alloc] init];
NSMutableArray *mutarray = [[NSMutableArray alloc] init];
for (NSString *s in mainlist)
{
NSRange ran = [s rangeOfString:listword];
if (ran.location !=NSNotFound)
{
//my codes here
}
}
EDIT:
I think I can solve this by writing
int i;
for (i = 0; i<[list count]; i++)
{
NSString *same = [list objectAtIndex:i];
NSLog (#"listword: %#", same);
}
But I am not sure where to place it, inside the for loop s in mainlist or outside.
EDIT: This for loop works inside the main for loop.
EDIT:
Tried these codes, but it doesnt work somehow..
NSArray *list = [[NSArray alloc] initWithArray:
[[NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:#"small" ofType:#"txt"]
encoding:NSUTF8StringEncoding error:NULL] componentsSeparatedByString:#"\n"]];
NSArray *mainlist = [[NSArray alloc] initWithArray:
[[NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:#"mainlist" ofType:#"txt"]
encoding:NSUTF8StringEncoding error:NULL] componentsSeparatedByString:#"\n"]];
NSMutableArray *large = [NSMutableArray arrayWithArray:mainlist];
NSArray *newlarge;
for (NSString *listword in list)
{
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"(SELF beginswith[c] %#)",listword];
newlarge = [large filteredArrayUsingPredicate:predicate];
}
NSLog (#"large: %#", newlarge);
NSLog (#"finished!");
"I want to filter away the objects from the small list of the main list."
If I understand correctly, you want to remove an array of items from another array. You don't want to do that much work and allocations inside an n^2 loop.
This removes an array of items from another array. Depending on how large your array is you may need to optimize further but this works:
NSArray *small = [NSArray arrayWithObjects:#"three", #"two", nil];
NSMutableArray *large = [NSMutableArray arrayWithObjects:#"one", #"two", #"three", #"four", nil];
[large removeObjectsInArray:small];
// print
for (NSString *current in large)
{
NSLog(#"item: %#", current);
}
This outputs:
2011-10-13 08:39:21.176 Craplet[5235:707] item: one
2011-10-13 08:39:21.178 Craplet[5235:707] item: four
I figured it out by myself and solved this :)
It works almost perfectly.
My codes:
NSArray *big = [[NSArray alloc] initWithObjects:#"hello ->mache", #"heisann hoppsann ->hiya", #"nei men ->da", #"however ->what", #"may ->april", #"mai ->maj", nil];
NSArray *small = [[NSArray alloc] initWithObjects: #"heisann ", #"nei men ", #"however ", #"mai", nil];
NSMutableArray *smallwithh = [[NSMutableArray alloc] init];
NSMutableIndexSet *mindexes = [[NSMutableIndexSet alloc] init];
for (NSString *same in small)
{
NSLog (#"listword: %#", same);
for (NSString *s in big)
{
NSRange ran = [s rangeOfString:same];
if (ran.location !=NSNotFound)
{
[smallwithh addObject:s];
NSUInteger ind = [big indexOfObject:s];
[mindexes addIndex:ind];
}
}
}
NSLog (#"smallwith: %#", smallwithh);
[smallwithh release];
NSMutableArray *newWords =[NSMutableArray arrayWithArray: big];
[newWords removeObjectsAtIndexes: mindexes];
[big release];
[small release];
NSLog (#"newWords: %#", newWords);
As explained in my earlier question …
This code …
- (void)syncKVO:(id)sender {
NSManagedObjectContext *moc = [self managedObjectContext];
[syncButton setTitle:#"Syncing..."];
NSString *dateText = (#"Last Sync : %d", [NSDate date]);
[syncDate setStringValue:dateText];
NSEntityDescription *entityDescription = [NSEntityDescription
entityForName:#"projects" inManagedObjectContext:moc];
NSFetchRequest *request = [[[NSFetchRequest alloc] init] autorelease];
[request setEntity:entityDescription];
NSError *error = nil;
NSArray *array = [moc executeFetchRequest:request error:&error];
if (array == nil)
{
NSAlert *anAlert = [NSAlert alertWithError:error];
[anAlert runModal];
}
NSArray *namesArray = [array valueForKey:#"name"];
NSPredicate *predicate = [CalCalendarStore taskPredicateWithCalendars:[[CalCalendarStore defaultCalendarStore] calendars]];
NSArray *tasksNo = [[CalCalendarStore defaultCalendarStore] tasksWithPredicate:predicate];
NSArray *tasks = [tasksNo valueForKey:#"title"];
NSMutableArray *namesNewArray = [NSMutableArray arrayWithArray:namesArray];
[namesNewArray removeObjectsInArray:tasks];
NSLog(#"%d", [namesNewArray count]);
NSInteger *popIndex = [calenderPopup indexOfSelectedItem];
//Load the array
CalCalendarStore *store = [CalCalendarStore defaultCalendarStore];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
NSString *supportDirectory = [paths objectAtIndex:0];
NSString *fileName = [supportDirectory stringByAppendingPathComponent:#"oldtasks.plist"];
NSMutableArray *oldTasks = [[NSMutableArray alloc] initWithContentsOfFile:fileName];
[oldTasks removeObjectsInArray:namesArray];
NSLog(#"%d",[oldTasks count]);
//Use the content
NSPredicate* taskPredicate = [CalCalendarStore taskPredicateWithCalendars:[[CalCalendarStore defaultCalendarStore] calendars]];
NSArray* allTasks = [[CalCalendarStore defaultCalendarStore] tasksWithPredicate:taskPredicate];
// Get the calendar
CalCalendar *calendar = [[store calendars] objectAtIndex:popIndex];
// Note: you can change which calendar you're adding to by changing the index or by
// using CalCalendarStore's -calendarWithUID: method
// Loop, adding tasks
for(NSString *title in namesNewArray) {
// Create task
CalTask *task = [CalTask task];
task.title = title;
task.calendar = calendar;
// Save task
if(![[CalCalendarStore defaultCalendarStore] saveTask:task error:&error]) {
NSLog(#"Error");
// Diagnostic error handling
NSAlert *anAlert = [NSAlert alertWithError:error];
[anAlert runModal];
}
}
NSMutableArray *tasksNewArray = [NSMutableArray arrayWithArray:tasks];
[tasksNewArray removeObjectsInArray:namesArray];
NSLog(#"%d", [tasksNewArray count]);
for(NSString *title in tasksNewArray) {
NSManagedObjectContext *moc = [self managedObjectContext];
JGManagedObject *theParent =
[NSEntityDescription insertNewObjectForEntityForName:#"projects"
inManagedObjectContext:moc];
[theParent setValue:nil forKey:#"parent"];
// This is where you add the title from the string array
[theParent setValue:title forKey:#"name"];
[theParent setValue:[NSNumber numberWithInt:0] forKey:#"position"];
}
for(CalTask* task in allTasks)
if([oldTasks containsObject:task.title]) {
[store removeTask:task error:nil];
}
// Create a predicate for an array of names.
NSPredicate *mocPredicate = [NSPredicate predicateWithFormat:#"name IN %#", oldTasks];
[request setPredicate:mocPredicate];
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:#"name" ascending:YES];
[request setSortDescriptors:[NSArray arrayWithObject:sortDescriptor]];
// Execute the fetch request put the results into array
NSArray *resultArray = [moc executeFetchRequest:request error:&error];
if (resultArray == nil)
{
// Diagnostic error handling
NSAlert *anAlert = [NSAlert alertWithError:error];
[anAlert runModal];
}
// Enumerate through the array deleting each object.
// WARNING, this will delete everything in the array, so you may want to put more checks in before doing this.
for (JGManagedObject *objectToDelete in resultArray ) {
// Delete the object.
[moc deleteObject:objectToDelete];
}
//Save the array
[namesArray writeToFile:fileName atomically:YES];
[syncButton setTitle:#"Sync Now"];
NSLog(#"Sync Completed");
}
triggers this code …
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
if ([keyPath isEqualToString:#"name"]) {
[self performSelector:#selector(syncKVO:)];
}
}
because I am adding objects and the KVO method is triggered when the Core Data 'name' property is changed.
I need to stop the observeValueForKeyPath:ofObject:change:context: method if it was triggered by the syncKVO method. How would I do this?
The simplest thing you could do is use an instance variable which keeps track of whether you’re syncing and ignore observer changes when it’s set. It may be better to stop and start observing at the beginning and end of syncKVO:, but it depends on what you’re actually observing: you don’t want to mass unsubscribe and resubscribe if you’re watching a large collection.
Looking at your code I wonder if you really want to do this syncing when entities are saved, and not as soon as the object keys changed. I think you’d be better off ditching observing completely and watching for the NSManagedObjectContextObjectsDidChangeNotification, using the values of the userInfo keys specified in the CoreData documentation to determine which entities need to be updated.