I have the following code which fetches a string from an array of strings and splits the string into 2 parts.
NSString *temp = [tableViewData objectAtIndex:indexPath.row];
NSArray *tempArray = [temp componentsSeparatedByString: #"_"];
cell.textLabel.text = [tempArray objectAtIndex:1];
and the String which is added is as follows
newTitle = [NSString stringWithFormat:#"%d_%#",[Daily_QuoteViewController counter],title];
[plistArray addObject:newTitle];
[plistArray writeToFile:filepath atomically: YES];
Which is adding an index and a string.
I am trying to then split that string in the first code section. but trying to access the second part of the string at index 1 gives an out of bounds error.
Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[NSArray objectAtIndex:]: index 1 beyond bounds [0 .. 0]'
What is the best way to split the string in order to use both parts of the string
split firstPart_secondPart
Thanks in advance.
This seems fine to me. Can you print out NSString temp? NSLog(#"%#", temp);
Related
I have seen may topics that talk about that but none of them has been useful for me. I am trying to parse GEORSS and the coordinates are given me with the following format:
<georss:point>4613618.31000115 676474.87007986</georss:point>
So I have tried to split it into an NSArray and then assign them to the corresponding XML key, but it always crash with that error:
2013-04-02 12:33:11.234 GeoRss1[2125:c07] * Terminating app due to uncaught exception 'NSRangeException', reason: '* -[__NSArrayM objectAtIndex:]: index 1 beyond bounds [0 .. 0]'
* First throw call stack:
(0x1959012 0x1275e7e 0x18fb0b4 0x19d23a8 0x3f48 0xd55a37 0x1c96600 0x1ca1a2b 0x1ca0f07 0xd53e02 0x34b8 0xd7b589 0xd79652 0xd7a89a 0xd7960d 0xd79785 0xcc6a68 0x14a1911 0x14a0bb3 0x14decda 0x18fb8fd 0x14df35c 0x14df2d5 0x13c9250 0x18dcf3f 0x18dc96f 0x18ff734 0x18fef44 0x18fee1b 0x18b37e3 0x18b3668 0x1b9ffc 0x1ddd 0x1d05)
libc++abi.dylib: terminate called throwing an exception
(lldb)
-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
}else if([elemAct isEqualToString:#"georss:point"]){
componentes = [[string componentsSeparatedByString:#" "] mutableCopy];
if ( componentes != nil){
[xmlLat appendString:componentes[0]];
[xmlLon appendString:componentes[1]];
}
...
...
In the header of that file I have declares both variables correctly and the synthesized them:
...
#property (strong) NSMutableString *xmlLat;
#property (strong) NSMutableString *xmlLon;
...
Thank you everyone for advanced, you already have helped me with some responses in other topics!
I tried following code :
NSString *abc = #"4613618.31000115 676474.87007986";
NSArray *componentes = [[abc componentsSeparatedByString:#" "] mutableCopy];
NSLog(#"componentes : %#",componentes);
NSMutableString *xmlLat = [[NSMutableString alloc]initWithString:#""];
NSMutableString *xmlLon = [[NSMutableString alloc]initWithString:#""];
[xmlLat appendString:componentes[0]];
[xmlLon appendString:componentes[1]];
NSLog(#"xmlLat : %#",xmlLat);
NSLog(#"xmlLon : %#",xmlLon);
It worked perfectly for me. I thin the problem is you are not getting proper data in your string.
I'm new to objective-c and I decided to start by working through Stanford's CS193s 2010F Session's lectures/assignments.
I was working on the second assignment, and I was stuck when I had to return a NSString that combines(concatenates) every strings inside NSMutableArray. (The MutableArray consists only NSString at its each indices)
My approach was to use a for loop to pass through the MutableArray's indicies(in the code below, the MutableArray is 'anExpression' with type 'id'). I declared a NSMutableString and added NSString at each indices of 'anExpression' array. Here is the code:
+ (NSString *)descriptionOfExpression:(id)anExpression{
NSMutableString *result = [NSMutableString string];
for (int i = 0;i<[anExpression count];i++){
[result appendString:[anExpression objectAtIndex:i]];
}
return result;
}
However, at
[result appendString:[anExpression objectAtIndex:i]];
xcode crashes with following error statements:
2012-07-17 01:44:51.014 Calculator[9470:f803] -[__NSCFNumber length]: unrecognized selector sent to instance 0x68732c0
2012-07-17 01:44:51.015 Calculator[9470:f803] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFNumber length]: unrecognized selector sent to instance 0x68732c0'
*** First throw call stack:
(0x13ca022 0x155bcd6 0x13cbcbd 0x1330ed0 0x1330cb2 0x12d2d18 0x13460d7 0x1397a8d 0x3a50 0x27ed 0x13cbe99 0x1714e 0x170e6 0xbdade 0xbdfa7 0xbd266 0x3c3c0 0x3c5e6 0x22dc4 0x16634 0x12b4ef5 0x139e195 0x1302ff2 0x13018da 0x1300d84 0x1300c9b 0x12b37d8 0x12b388a 0x14626 0x1ed2 0x1e45 0x1)
terminate called throwing an exception
I looked through apple's developer's document, saw 'NSString stringWithFormat:' method, and decided to use this method instead:
+ (NSString *)descriptionOfExpression:(id)anExpression{
NSMutableString *result = [NSMutableString string];
for (int i = 0;i<[anExpression count];i++){
[result appendString:[NSString stringWithFormat:#"%#",[anExpression objectAtIndex:i]]];
}
return result;
}
and it works now.
now I'm confused why second code works but the first doesn't.
I thought appending string only fails(and crashes) when it's passed a nil...
Is there something I'm missing?
Thank you in advance :)
It looks like the contents of anExpression are instances of NSNumber instead of NSString. The error you are getting is a hint as to how appendString works; it's first step is obviously to ask the passed "string" how long it is (presumably so it can allocate enough memory). This is obviously not a method on NSNumber (hence the crash) and stringWithFormat is designed to do type-checking and be more flexible.
I suspect you could also use stringValue just as well:
[result appendString:[[anExpression objectAtIndex:i] stringValue]];
+ (NSString *)descriptionOfExpression:(id)anExpression{
NSMutableString *result = [NSMutableString string];
for (int i = 0;i<[anExpression count];i++) {
[result appendString:[[anExpression objectAtIndex:i] stringValue]];
}
return result;
}
Converting it into string would help you!!
Use this function:
+ (NSString *)descriptionOfExpression:(id)anExpression
{
NSMutableString *result = [[NSMutableString alloc] init];
for (int i = 0;i<[anExpression count];i++)
{
NSString *str = [NSString stringWithFormat:#"%#",[anExpression objectAtIndex:i]];
if(str)
{
[result appendString:str];
}
//OR
//[result appendFormat:[NSString stringWithFormat:#"%#",[anExpression objectAtIndex:i]]];
}
return result;
}
I have an array which I store different classes which again hold different arrays. All arrays are defined as NSMutabelArrays.
When I want to delete an object in an array, my app crashes. This is my code:
NSLog(#"string to be deleted:%#", [[[self.myLibrary objectAtIndex:self.currentNoteBookNumber] tabReference] objectAtIndex:tid]);
NSLog(#"string to be deleted:%#", [[[self.myLibrary objectAtIndex:self.currentNoteBookNumber] tabColours] objectAtIndex:tid]);
NSLog(#"string to be deleted:%#", [[[self.myLibrary objectAtIndex:self.currentNoteBookNumber] tabTitles] objectAtIndex:tid]);
[[[self.myLibrary objectAtIndex:self.currentNoteBookNumber] tabReference] removeObjectAtIndex:tid];
[[[self.myLibrary objectAtIndex:self.currentNoteBookNumber] tabColours] removeObjectAtIndex:tid];
[[[self.myLibrary objectAtIndex:self.currentNoteBookNumber] tabTitles] removeObjectAtIndex:tid];
And this is the console output:
2011-05-01 22:03:40.788 M[61452:207] string to be deleted:2
2011-05-01 22:03:40.789 M[61452:207] string to be deleted:Orange
2011-05-01 22:03:40.791 M[61452:207] string to be deleted:Art
2011-05-01 22:03:40.806 M[61452:207] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[NSMutableArray objectAtIndex:]: index 0 beyond bounds for empty array'
I don't really know what I'm doing wrong. There is obviously something in the array, so it shouldn't be 0. I mean it is the ONLY thing stored in the array at the moment, but that shouldn't be a problem, I guess?
I'd be very grateful for any help on this.
EDIT:
I think I haven't provided enough code. This is the method in which I set up myLibrary:
-(void) setupLibrary {
myLibrary = [[NSMutableArray alloc] init];
NoteBook *newNoteBook = [[NoteBook alloc] init];
newNoteBook.titleName = #"TEST";
NSMutableArray *ttArray = [[NSMutableArray alloc] init];
[ttArray addObject:#"Art"];
NSMutableArray *tcArray = [[NSMutableArray alloc] init];
[tcArray addObject:#"Orange"];
NSMutableArray *trArray = [[NSMutableArray alloc] init];
[trArray addObject: [NSNumber numberWithInteger:2]];
newNoteBook.tabTitles = ttArray;
newNoteBook.tabColours = tcArray;
newNoteBook.tabReference = trArray;
[myLibrary addObject:newNoteBook];
currentNoteBookNumber = 0;
[newNoteBook release];
[ttArray release];
[tcArray release];
[trArray release];
}
Now it appears that if I delete, for instance, one object in the tabTitles array (e.g. "Art"), I delete the entire newNoteBook object. I.e. once I delete a string in tabTitles, all other strings at the same position in tabColours or tabReference will be deleted as well. Why is this so?
The following code will crash after I successfully deleted the string # position 0 in an array in my class which is stored in another array:
NSLog(#"string deleted:%#", [[[self.myLibrary objectAtIndex:0] tabReference] objectAtIndex:0]);
[[[self.myLibrary objectAtIndex:0] tabReference] removeObjectAtIndex:0];
NSLog(#"string deleted:%#", [[[self.myLibrary objectAtIndex:0] tabColours] objectAtIndex:0]);
[[[self.myLibrary objectAtIndex:0] tabColours] removeObjectAtIndex:0];
Don't know what's the problem here, but you should consider to keep your arrays safe:
if([yourArray count] > tid) {
[yourArray removeObjectAtIndex.tid;
}
Your error
-[NSMutableArray objectAtIndex:]: index 0
is telling that you are trying to get an object at index 0 not that you want to remove it. So I think what you did is you called the method where you have your reading and removing code 2 times in a row. Try to see it that is the case.
I have a method with the following code:
NSMutableArray *pickerArray = [[NSMutableArray alloc] init];
int i;
for(i = 1; i <= 7; i++) {
NSString *myString = [NSString stringWithFormat:#"%#", i];
[pickerArray addObject:myString];
}
for(i = 1; i <= 7; i++) {
NSString *fieldName = [[NSString alloc] initWithFormat:#"column%d", i];
[self setValue:pickerArray forKey:fieldName]; // setValue or initWithArray ???
[fieldName release];
[pickerArray release];
}
srandom(time(NULL));
When I build the application everything builds correctly but it crashes on start in the console i get the following error:
* -[NSCFString superview]: unrecognized selector sent to instance 0x380da90
* Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSCFString superview]: unrecognized selector sent to instance 0x380da90'
If instead of using an array containing strings I use UIImageView containing UIImages then everything works correctly...
I only would like to populate my picker with an array of numbers from 1 to 50...
Any help would be really appreciated... this thing is driving me mad :)
I don't think you want [myString release]; in your first for loop as the string you create is auto-released (rule of thumb, anything that is created without alloc, init, or new is auto-released)
Problem solved.... was something to do with the number of element in the pickerview, nothing to do with the method itself! Thanks anyway!
i try to append from NSMutableArray but the below exception, actually first 2 loop its giving result but the 3rd loop giving this exception
2009-12-04 12:01:19.044 AppBuzz[14562:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSCFString appendString:]: nil argument'
2009-12-04 12:01:19.057 AppBuzz[14562:207] Stack: (
820145437,
837578260,
819694387,
819694291,
814894619,
814804961,
17445,
23977,
18651,
19281,
862009284,
9035,
861597328,
861596264,
861928960,
861926972,
861925524,
858687888,
819893547,
819891231,
861592584,
861585968,
8749,
8612
)
terminate called after throwing an instance of 'NSException'
my code as below
for (int i = 0; i < [student count]; i++)
{
if([student objectAtIndex:i] != NULL)
{
dic = [student objectAtIndex:i];
tempName = [dic objectForKey:#"NAME"];
tempAvgMark = [[dic objectForKey:#"AVG_MARK"] intValue];
[data appendString:#"{\"name\":\""];
[data appendString:tempName]; // here i'm having prob
[data appendString:#"\",\"avg_mark\":\""];
//[data appendString:tempAvgMark];
[data appendString:#"\"}"];
}
}
NSLOG(#"Result - %#",data);
can anyone help for
1) to append [data appendString:tempName];
2) to append int value ([data appendString:tempAvgMark]; ) into data
thanks
You're trying to append a nil, which is illegal. You can easily get around this by changing the line in question to the following:
[data appendString:(tempName == nil ? #"" : tempName)];
Or replace that empty string with whatever else you want. To append a non-string value, convert it to a string like this:
[data appendString:[NSString stringWithFormat:#"%i", tempAvgMark]];
If tempAvgMark is not an 'int', you'll have to change the %i. For example, for NSNumbers, use %# instead.
The object for the key #"NAME" in the dictionary has to be a string, and to append an int you can use [string appendFormat:#"%d", someInt].
It appears from this message: NSCFString appendString:]: nil argument' that one of the dictionary values is null