I am creating this application but I don't know how to handle the error when there is no value for a given entry in the NSDictionary. Here is the code that I have currently:
NSDictionary *entry = [self entries][indexPath.row];
NSDictionary *text = [self entries][indexPath.row];
NSString *user = entry[#"user"][#"full_name"];
NSString *caption = text[#"caption"][#"text"];
if (caption != nil && entry != [NSNull null] && text != nil && caption != [NSNull null]) {
RNBlurModalView *modal = [[RNBlurModalView alloc] initWithViewController:self title:user message:caption];
[modal show];
}
Here is the error response I receive when I tap on a cell without any caption:
2013-08-08 02:36:57.871 Floadt[5566:c07] -[NSNull objectForKeyedSubscript:]: unrecognized selector sent to instance 0x310b678
2013-08-08 02:36:57.872 Floadt[5566:c07] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSNull objectForKeyedSubscript:]: unrecognized selector sent to instance 0x310b678'
*** First throw call stack:
(0x2fda012 0x260be7e 0x30654bd 0x2fc9bbc 0x2fc994e 0x5606b 0x1c7a42f 0x1c8c182 0x1c8c394 0x261f705 0x188693c 0x18869ac 0x261f705 0x188693c 0x18869ac 0x1a401d3 0x2fa2afe 0x2fa2a3d 0x2f807c2 0x2f7ff44 0x2f7fe1b 0x2bb77e3 0x2bb7668 0x1778ffc 0x2d2d 0x2c55)
libc++abi.dylib: terminate called throwing an exception
Not clear why entry and text are the same thing. That could be a typo that is causing you issues:
NSDictionary *entry = [self entries][indexPath.row];
NSDictionary *text = [self entries][indexPath.row];
Then, you should really use isEqual for your equality checks (even if only to prevent you getting into bad habits) and check the obtained values (you don't currently check user):
if (![user isEqual:[NSNull null]] && ![caption isEqual:[NSNull null]]) {
Your current checks are mostly redundant - you need to check things before you use them, not afterwards. Checking entry and text must be done earlier. Then check user and caption.
Why you are using two NSDictionary though they store same value [self entries][indexPath.row]?
Change your checking as follow
if (!caption && ([entry isKindOfClass:[NSDictionary class]]) && ([text isKindOfClass:[NSDictionary class]]))
Related
I have
NSMutableDictionary *mutDic;
its loaded with some values from other NSMutableDictionary
from an alert i am trying to update its value
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
[self.mutDic setValue:[[alertView textFieldAtIndex:0] text] forKey:#"lname"];
}
but i am getting this exception
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[__NSCFDictionary setObject:forKey:]: mutating method sent to immutable object'
how we can update dictionary ?
I had the same exception before even though my dictionary was mutable. Let me explain my scenario to you, may be it will help :
I had NSMutableArray of NSMutableDictionary,
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
dict = [array objectAtIndex:0];
[dict setObject:#"" forKey:#""]; <-- it was crashing on this line...
so I changed my code as below,
NSMutableDictionary *dict = [[NSMutableDictionary alloc] initWithDictionary:[array objectAtIndex:0]];
it worked fine :)
found out the exception problem, but not solved fully
on load i need to take values from other dictionary for that the method i used was wrong, i just assign oldDic to mutDic, i changed to
self.mutDic = [[[NSMutableDictionary alloc] initWithDictionary:manager.oldDic] retain];
their initialized it by
self.oldDic = [[[NSMutableDictionary alloc]initWithObjectsAndKeys:#"F Name",#"fname",#"L Name",#"lname", nil ]retain];
that solved the exception
i am getting json data from this link
now i want data from "html_instructions": part
NSDictionary *result = [stringtext JSONValue];
NSLog(#"here");
NSArray *resultarr = [result objectForKey:#"routes"];
NSString *string;
for(NSDictionary *di in resultarr){
NSLog(#"for loop");
string = [[di objectForKey:#"legs"] objectForKey:#"steps"];
}
but after printing "for loop" in console it is throwing an exception
2011-05-20 16:16:26.997 speedymap[759:207] -[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x62a7d60
2011-05-20 16:16:26.999 speedymap[759:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayM objectForKey:]: unrecognized selector sent to instance 0x62a7d60'
please help me
i want html_instructiuons field value
Check if resultarr and di really contains anything or not.
NSDictionary *result = [stringtext JSONValue];
NSLog(#"here");
NSArray *resultarr = [result objectForKey:#"routes"];
CFShow(resultarr);
NSString *string;
for(NSDictionary *di in resultarr){
CFShow(di);
NSLog(#"for loop");
NSArray *tempArr = [[di objectForKey:#"legs"] objectForKey:#"steps"];
}
http://jsonviewer.stack.hu/#http://maps.googleapis.com/maps/api/directions/json?origin=delhi&destination=noida&waypoints=&sensor=true
Check the viewer and set the values accordingly. [di objectForKey:#"legs"] returns an array. the first object of that array is a dictionary which has the key steps. But that too returns another array.
it seems my Problem isn't a problem for anybody eles because I havend fount anything about it.
so it maybe isn't such a big Problem but for me it is.
I have this MutableArray filled with alot of data from an XML file.
-Name -Age -Address
The search goes for the Name, and the filtering works pretty fine so far.
what I do is search the array with rangeOfString but that only returns the String (-Name) and not the Array with it's content like the original Array because its only a string now.
can anyone tell me how do I accomplish this
That's my search so far
if ([[self searcher] length] != 0)
{
for (NSString *currentString in [self listOfContent])
{
if ([currentString rangeOfString:searchTerm options:NSCaseInsensitiveSearch].location != NSNotFound)
{
[[self filteredListOfContent] addObject:currentString];
}
searcher is the String in the SearchBar.
or is there any other more efficent way or is it possible to search for any value in the MutipleArry?!?
Any Ideas and suggestions are welcome
I changed the code to this
NSString *searchText = searchBar.text;
NSMutableArray *searchArray = [[NSMutableArray alloc] init];
for (NSDictionary *dictionary in listOfContent)
{
//NSArray *array = [dictionary objectForKey:LNAME];
[searchArray addObject:dictionary];
}
for (NSString *sTemp in searchArray)
{
NSLog(#"array %#", searchArray);
if ([sTemp rangeOfString:searchText options:NSCaseInsensitiveSearch].location != NSNotFound)
[filteredListOfContent addObject:searchArray];
}
the log shows that the filter seems to work but then I get this error
2010-10-22 16:18:09.708 TableView[6114:207] -[__NSCFDictionary rangeOfString:options:]: unrecognized selector sent to instance 0x5c3f540
2010-10-22 16:18:09.712 TableView[6114:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFDictionary rangeOfString:options:]: unrecognized selector sent to instance 0x5c3f540'
can anyone tell me what the problem is
And Still no solution found I changed the Code to this:
NSMutableArray *searchArray = [[NSMutableArray alloc] init];
for (NSDictionary *dictionary in contentsList)
{
NSArray *array = [dictionary allValues];
[searchArray addObjectsFromArray:array];
}
for (NSDictionary *dict in searchArray)
{
if ([[dict valueForKey:#"NAME"] rangeOfString:searchTerm options:NSCaseInsensitiveSearch].location != NSNotFound) {
NSLog(#"Filter %#", dict);
[searchResults addObject:dict];
}
now i Have the array with the values but still get the error
2010-10-28 16:23:46.124 TableViews[8373:207] *** Terminating app due to uncaught exception
'NSInvalidArgumentException', reason: '-[NSCFString objectForKey:]: unrecognized selector sent to instance 0x5a5eb00'
can anyone explain me waht taht that error means or waht I did wrong?!?
2010-10-28 16:23:46.124 TableViews[8373:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSCFString objectForKey:]: unrecognized selector sent to instance 0x5a5eb00'
That error means you treated an NSString as if it were an NSDictionary by sending the message -objectForKey: to it.
StringReply = [[NSString alloc] initWithData:dataReply encoding:NSUTF8StringEncoding];
//Regex Out Artist Name
//NSString *regEx = ;
NSArray *iTunesAristName = [stringReply componentsMatchedByRegex: #"(?<=artistname\":\")([^<]+)(?=\")"];
if ([iTunesAristName isEqual:#""]) {
NSLog(#"Something has messed up");
//Regex Out Song Name
}else{
NSLog(iTunesAristName);
}
NSLog(iTunesAristName);
[stringReply release];
I just keep getting this error ?
2010-09-29 21:15:16.406 [2073:207] *** -[NSCFArray length]: unrecognized selector sent to instance 0x4b0b800
2010-09-29 21:15:16.406 [2073:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSCFArray length]: unrecognized selector sent to instance 0x4b0b800'
2010-09-29 21:15:16.407 [2073:207] Stack: (
please help its driving me crazy
The first argument to NSLog is supposed to be a format string. You're passing an NSArray. When the function tries to treat your array as a string, you get that error. Instead, use NSLog(#"%#", iTunesAristName);.
Chuck has answered your question, but I've noticed something else that is problematic.
NSArray is an array, not a string, so [iTunesArtistName isEqual:#""] will never return true, because they are different classes. Even if iTunesArtistName was a string, it should be compared using the isEqualToString: method, not isEqual:.
If you want to extract only the artist's name, you might be able to do this:
NSArray *matches = [stringReply componentsMatchedByRegex: #"(?<=artistname\":\")([^<]+)(?=\")"];
if ([matches count] == 0)
{
NSLog(#"Could not extract the artist name");
}
else
{
NSString *iTunesArtistName = [matches objectAtIndex:0];
NSLog(#"Artist name: %#", iTunesArtistName);
}
I see you're using RegexKitLite, make sure you import libicucore.dylib, i was getting the same error until i imported that library.
NSArray *results = [managedObjectContext executeFetchRequest:request error:&error];
if(results == nil){
NSLog(#"No results found");
searchObj = nil;
}else{
if ([[[results objectAtIndex:0] name] caseInsensitiveCompare:passdTextToSearchFor] == 0) {
NSLog(#"results %#", [[results objectAtIndex:0] name]);
searchObj = [results objectAtIndex:0];
}else {
NSLog(#"No results found");
searchObj = nil;
}
}
The code above compares data a user enters to data pulled from a database. If I enter data which is in the database; it works. But if I enter complete gibberish it returns the error below instead of "No results found."
*** WebKit discarded an uncaught exception in the webView:shouldInsertText:replacingDOMRange:givenAction: delegate: <NSRangeException> *** -[NSCFArray objectAtIndex:]: index (0) beyond bounds (0)
The results array being null should be accounted for during the checks in the above code, no?
You are potentially throwing an exception on the following line of code:
if ([[[results objectAtIndex:0] name] caseInsensitiveCompare:passdTextToSearchFor] == 0)
If the array is initialized and has zero elements, you'll pass the nil check, but you'll throw an exception when trying to access any objects within the array itself.
- (NSArray *)executeFetchRequest:(NSFetchRequest *)request error:(NSError **)error can return an empty array. You should use NSArray's count method instead of checking to see if the array is nil.
I recommend you set a breakpoints on objc_exception_throw and [NSException raise] as well to aid you in debugging your applications. Then run a backtrace in gdb to see where the exception is being thrown to further diagnose the real problem.
Chris Hanson has a great writeup on how to accomplish they above located here