I've been playing around with a search facility for my application table view for a while now trying to get it working but i keep getting the same error in my console.
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: ' [NSCFDictionary rangeOfString:options:]: unrecognized selector sent to instance
I believe that this following section may be the problem I have tried passing some NSLog entries inside the if statement and it seems to get through it but the problem is when I click on the search bar and starting typing, the first letter I type calls the error and cancels my app.
Here is where the problem is
In View Will Appear "Food" Array is initialized as below:
NSString *myDBnew =#"/Users/taxsmart/Documents/rw3app.sql";
database = [[Sqlite alloc] init];
[database open:myDBnew];
NSString *quer = [NSString stringWithFormat:#"Select category from foodcat"];
Food = [database executeQuery:quer];
//[database executeNonQuery:quer];
[database close];
Search bar delegate method where error is encountered:
(void) searchTableView
{
NSString *searchText = searchBar.text;
NSMutableArray *searchArray = [[NSMutableArray alloc] init];
// [searchArray addObjectsFromArray:Food];
for(NSDictionary *dictionary in Food)
{
NSString temp1 = [dictionary objectForKey:#"category"];
[searchArray addObject:temp1];
}
for (NSString *sTemp in searchArray)
{
NSLog(#"Value: %#",NSStringFromClass([sTemp class]));
NSRange titleResultsRange = [sTemp rangeOfString:searchText options:NSCaseInsensitiveSearch];
if (titleResultsRange.length > 0)
[copyListOfItems addObject:sTemp];
}
[searchArray release];
searchArray = nil;
}
What should I do?
Please Help.
Please Suggest
Thanks
It looks that result of database query (Food) is dictionary that contains dictionary. This code:
for(NSDictionary *dictionary in Food)
{
NSString temp1 = [dictionary objectForKey:#"category"];
[searchArray addObject:temp1];
}
can be replaced with:
for(NSDictionary *dictionary in Food)
{
NSObject *ob = [dictionary objectForKey:#"category"];
if([ob isKindOfClass: [NSString class]])
{
[searchArray addObject:ob];
}
else if([ob isKindOfClass: [NSDictionary class]])
{
NSDictonary *dic1 = (NSDictionary*)ob;
// ... at this point you can get the string for desired dictionary key
// or you can ignore it
}
}
With this code we can be sure that only strings are put into searchArray.
If you want to make full tree parsing for desired key 'category' then you should make some recursive function to search the dictionary.
You can dump Food variable to console to see at which leaf is actually the result you are looking for. Put the break-point and into console type 'po Food'.
Appears that there is an NSDictionary in your dataArray.
Add an
NSLog(#"%#",NSStringFromClass([description class]]));
To see which classes your dataArray contains.
Related
I have the following Array which retrieved from the Core Data :
NSArray *dataArray = [context executeFetchRequest:request error:&error];
so I wrote this code to get each row data individually to send it to REST API:
for (NSString *str in dataArray) {
NSString *name =[dataArray valueForKey:#"name"];
NSString *dob = [dataArray valueForKey:#"dob"];
int gender =[[dataArray valueForKey:#"gender"]integerValue];
NSString *childId =[dataArray valueForKey:#"id"];
int response = [network sendName:name withDateOfBirth:dob andGender:gender forID:childId];
if (response == 200) {
// [self performSelectorOnMainThread:#selector(postSuccess) withObject:nil waitUntilDone:YES];
NSLog(#"Success");
}
}
but it's not working, because I couldn't know how data is stored in each index in the array!!
Please help, and if I am not doing this correctly please tell me a better way to do it.
Thanks.
NSString *name =[dataArray valueForKey:#"name"];
This doesn't do what you think it'll do. valueForKey:, when sent to an array, returns an array of the values corresponding to the given key for all the items in the array. So, that line will assign an array of the "name" values for all the items in dataArray despite the fact that you declared name as a NSString. Same goes for the subsequent lines.
What you probably want instead is:
for (NSManagedObject *item in dataArray) {
NSString *name = [item valueForKey:#"name"];
...
Better, if you have a NSManagedObject subclass -- let's call it Person representing the entity you're requesting, you can say:
for (Person *person in dataArray) {
NSString *name = person.name;
...
which leads to an even simpler version:
for (Person *person in dataArray) {
int response = [network sendName:person.name
withDateOfBirth:person.dob
andGender:person.gender
forID:person.id];
although I'd change the name of that method to leave out the conjunctions and prepositions. -sendName:dateOfBirth:gender:id: is enough, you don't need the "with", "and", and "for."
I found a workaround myself, but still trying to understand the problem.
I created a Autocomplete text field with the use of uitableview which is hidden until textfield is edited. The UI part works fine. It's the searching for the results part that's the problem. I declared a local NSMutableDictionary to store my results because I wanted the results to be sorted by the key's values.
if I call keysSortedByValueUsingSelector on the dictionary directly, it crashes. However if I get the keys by [dict allKeys] first, then call sortedArrayUsingSelector, it works fine:
// This commented out line will crash
// NSArray *sortedKeysArray = [dict keysSortedByValueUsingSelector:#selector(compare:)];
// The next two lines runs fine.
NSArray *keyArray = [dict allKeys];
NSArray *sortedKeysArray = [keyArray sortedArrayUsingSelector:#selector(compare:)];
Here is the complete source code for the search method:
- (void)searchAutocompleteEntriesWithSubstring:(NSString *)substring
{
// Put anything that starts with this substring into the autocompleteUrls array
// The items in this array is what will show up in the table view
[autocomplete_symbol_array removeAllObjects];
rRSIAppDelegate *appDelegate = (rRSIAppDelegate *)([[UIApplication sharedApplication] delegate]);
NSString *input_str = [substring uppercaseString];
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
int i = 0;
for(SymbolInfo *symbol_info in appDelegate.m_symbol_info_array)
{
i++;
NSString *info_str = [[[symbol_info.m_symbol uppercaseString] stringByAppendingString:#"|"] stringByAppendingString:[symbol_info.m_company_name uppercaseString]];
NSUInteger pos = [info_str rangeOfString:input_str].location;
if (pos != NSNotFound)
{
int tmp = pos * 10000 + i;
NSNumber *map_key = [[NSNumber alloc] initWithInt:tmp];
[dict setObject:symbol_info forKey:map_key];
}
}
// This commented out line will crash
// NSArray *sortedKeysArray = [dict keysSortedByValueUsingSelector:#selector(compare:)];
// The next two lines runs fine.
NSArray *keyArray = [dict allKeys];
NSArray *sortedKeysArray = [keyArray sortedArrayUsingSelector:#selector(compare:)];
for (NSNumber *key in sortedKeysArray)
{
SymbolInfo *symbol_info = [dict objectForKey:key];
[autocomplete_symbol_array addObject:symbol_info];
}
// NSLog(#"everything added: %d", [autocomplete_symbol_array count]);
[autocompleteTableView reloadData];
}
The NSMutableDictionary's method is:
- (void)setObject:(id)anObject forKey:(id < NSCopying >)aKey;
This means that the key should implement the NSCopying protocol.
I have the following code:
NSDictionary *dict = [[NSDictionary alloc]
initWithObjectsAndKeys:myarray1, #"array1", myarray2, #"array2" nil];
NSArray *shorts =[[dict allKeys] sortedArrayUsingSelector:#selector(compare:)];
for (NSString *dir in shorts) {
NSArray *tempArr = [dict objectForKey:dir];
for (NSString *file in tempArr ) {
NSLog(#"%#", file);
}
}
Where myarray1 and myarray2 are NSArrays.
When I execute the code the application crashes with:
-[NSCFString countByEnumeratingWithState:objects:count:]: unrecognized selector sent to instance 0x1d134
This is apparently the tempArr, which is not recognized as an NSArray. I know that [dicFiles objectForKey:dir] returns an id type object, but as a generic type, I cannot get what I'm doing wrong.
You haven't included the code that initializes myarray1 and myarray2, but apparently one or both of them are instances of NSString rather than NSArray. You can check that after retrieving one of the objects from the array as follows:
if (![tempArr isKindOfClass:[NSArray class]])
{
NSLog(#"Unable to process temp array because it's an instance of %#", [tempArr class]);
}
else
{
// for loop code goes here...
}
NSMutableArray count is returning zero after adding objects to it, its been an hour of hacking away trying to figure out why, and I'm still stuck, so that brings me here.
Any ideas based off the following code, what the problem is?
the object 'search' is a custom class defined in the header set as a pointer, with retain, nonatomic attributes.
- (NSMutableArray *) populateArrayFromPlist{
NSLog(#"Populate Array from PList");
NSDictionary *dictionary;
// read "foo.plist" from application bundle
NSString *path = [[NSBundle mainBundle] bundlePath];
NSString *finalPath = [path stringByAppendingPathComponent:#"asearch.plist"];
dictionary = [NSDictionary dictionaryWithContentsOfFile:finalPath];
for (id key in dictionary)
{
search = [[ASearch alloc] init];
[dictionary valueForKey:key];
[search setID:[[dictionary valueForKey:key] intValue] ];
//[[search searchString] initWithString: key];
search.searchString = [[NSMutableString alloc] initWithString: key];
if (search == nil) {
printf("Let me know now\n\n\n\n");
}
NSLog(#"%#", [search searchString]);
NSLog(#"Setting string Value: %s\n", [key cString]);
NSLog(#"Setting ID Value: %i\n", [[dictionary valueForKey:key] intValue]);
//NSLog(#"aSearchArray count == %i", [[aSearchArray count] intValue]);
[aSearchArray addObject:search];
NSLog(#"aSearchArray count == %i", [aSearchArray count] );
aSearchArray is a nil object that is the only reason why you are getting count as zero.
For more confirmation just create a new local array and try to add your object to it.
You will get a proper count
So I'm having trouble implementing a search bar in my app.
The methods find the filtered items but for some reason they won't show up in my tableview.
I think it has something to do with adding the objects to the filteredListContentArray.
What object should I be adding for this to work.
Here's my code:
{
[self.filteredListContent removeAllObjects]; // First clear the filtered array.
for (NSDictionary *dictionary in tableDataSource)
{
NSString *testString = [dictionary valueForKey:#"Title"];
NSLog(#"String list to be Searched is %#", testString);
//NSLog(#"Contents of list are %#", testString);
NSComparisonResult result = [testString compare:searchText options:(NSCaseInsensitiveSearch|NSDiacriticInsensitiveSearch) range:NSMakeRange(0, [searchText length])];
//NSObject *filteredObject = [dictionary objectForKey:#"Title"];
if (result == NSOrderedSame)
{
NSLog(#":-)");
NSLog(#"Resulted object is %#", [dictionary valueForKey:#"Title"]);
[self.filteredListContent addObject:dictionary];
}
else
{
NSLog(#":-(");
}
}
NSLog(#"Contents of Filtered list are %#", self.filteredListContent);}
That last NSLog reads (null) every time, but the NSLog Above it always shows the correct filtered items.
where do you allocate memory for your filteredListContent? and there is tableDataSource array. do you fill your table from filteredListContent or from tableFataSource array? also you can try to print to console [filteredListContent description];