while(sqlite3_step(compiledStatement) == SQLITE_ROW) {
NSString *araci2 = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 2)];
[dbarray addObject:araci2];
NSLog(#"DB ITEMS: %#",dbarray);
}
First of all, I try to get a description longer than a line from db. While part of the value appears meaningful, some of the characters of those values are absurd like "00fu". How can I print them in proper fashion ?
I got over gentles. .. I created class and received those values by class variable.
Related
NSString *result
result contains:
NC_AllowedWebHosts=
NC_BgeLAN=br1
NC_Doc=/tmp/dhd=
NC_ExPts=1863==
NC_Redirect=1
[...]
binary_custom=/path/to/directory
blocklist=0
blocklist_url=http://list.g.com/?list=
[...]
I am using this function but i have problems parsing list with double == or triple === for example.
NSArray *strings = [result componentsSeparatedByCharactersInSet:
[NSCharacterSet characterSetWithCharactersInString:#"=\r\n"]];
NSMutableArray *keys = [NSMutableArray new];
NSMutableArray *values = [NSMutableArray new];
for (int i = 0; i+1 < strings.count; i+=2) {
[keys addObject:strings[i]];
[values addObject:strings[i+1]];
}
I would like to parse everything based on new line "\r\n" first then everything that is before the first "=" symbol put in a dictionary key, and everything after up to the new line in a dictionary value. This way I can say get me key "NC_ExPts" and value would return "1863==" and so on. Any help would be appreciated.
#Monolo I can read line-by-line but I don't know how to get values on the first appearance of "=" and put it in values and keys
NSArray *lines = [result componentsSeparatedByCharactersInSet:
[NSCharacterSet characterSetWithCharactersInString:#"\r\n\n"]];
for (NSString* line in lines) {
if (line.length) {
NSLog(#"line: %#", line);
}
}
You need to read the original text line-by-line, then divide each line by only the first "="-sign. With the method you are using, you divide lines and key-value pairs in one go, meaning that you lose too much information about the structure of the data. This is why you are having difficulties handling lines with "==" in them in the value part.
NSString's enumerateLinesUsingBlock: will take care of the first part, and finding the first "=" in each of those lines is easily done with rangeOfString:.
I have a text file that contains two lines of numbers, all I want to do is turn each line into a string, then add it into an array (called fields). My problem arrises when trying to find the EOF character. I can read from the file with no problem: I turn it's content into a NSString, then pass to this method.
-(void)parseString:(NSString *)inputString{
NSLog(#"[parseString] *inputString: %#", inputString);
//the end of the previous line, this is also the start of the next lien
int endOfPreviousLine = 0;
//count of how many characters we've gone through
int charCount = 0;
//while we havent gone through every character
while(charCount <= [inputString length]){
NSLog(#"[parseString] while loop count %i", charCount);
//if its an end of line character or end of file
if([inputString characterAtIndex:charCount] == '\n' || [inputString characterAtIndex:charCount] == '\0'){
//add a substring into the array
[fields addObject:[inputString substringWithRange:NSMakeRange(endOfPreviousLine, charCount)]];
NSLog(#"[parseString] string added into array: %#", [inputString substringWithRange:NSMakeRange(endOfPreviousLine, charCount)]);
//set the endOfPreviousLine to the current char count, this is where the next string will start from
endOfPreviousLine = charCount+1;
}
charCount++;
}
NSLog(#"[parseString] exited while. endOfPrevious: %i, charCount: %i", endOfPreviousLine, charCount);
}
The contents of my text file look like this:
123
456
I can get the first string (123) no problem. The call would be:
[fields addObject:[inputString substringWithRange:NSMakeRange(0, 3)]];
Next, I make the call for the second String:
[fields addObject:[inputString substringWithRange:NSMakeRange(4, 7)]];
But I get an error, and I think it is because my index is out of bounds. Since the index starts from 0, there is no index 7 (well I think its supposed to be the EOF character), and I get an error.
To sum everything up: I don't know how to deal with an index of 7 when there are only 6 characters + the EOF character.
Thanks.
You can use componentsSeparatedByCharactersInSet: to get the effect that you are looking for:
-(NSArray*)parseString:(NSString *)inputString {
return [inputString componentsSeparatedByCharactersInSet:[NSCharacterSet newlineCharacterSet]];
}
Short answer is to use [inputString componentsSeparatedByString:#"\n"] and get the array of numbers.
Example:
Use the following code to get the lines in an array
NSString *path = [[NSBundle bundleForClass:[self class]] pathForResource:#"aaa" ofType:#"txt"];
NSString *str = [[NSString alloc] initWithContentsOfFile: path];
NSArray *lines = [str componentsSeparatedByString:#"\n"];
NSLog(#"str = %#", str);
NSLog(#"lines = %#", lines);
The above code assumes that you have a file called "aaa.txt" in your resources which is plain text file.
This has given me quite a big headache. For whatever reason, when I use this code, the if statement always evaluates to false:
while(!feof(file))
{
NSString *line = [self readNSString:file];
NSLog(#"%#", line);
NSLog(#"%#", search);
NSRange textRange;
textRange =[line rangeOfString:search];
if(textRange.location != NSNotFound)
{
NSString *result = [line substringFromIndex:NSMaxRange([line rangeOfString:search])];
resultView.text = result;
}
else
{
resultView.text = #"Not found";
}
}
When the functions execute, the two NSLogs tell me that the "line" and "search" strings are what they should be, so then why does the if statement always evaluate to false? I must be missing something simple, having another set of eyes would be great. Thanks
edit: (function "readNSString")
- (NSString*)readNSString:(FILE*) file
{
char buffer[300];
NSMutableString *result = [NSMutableString stringWithCapacity:256];
int read;
do
{
if(fscanf(file, "%299[^\n]%n%*c", buffer, &read) == 1)
[result appendFormat:#"%s", buffer];
else
break;
} while(r == 299);
return result;
}
edit 2:
search is set with a call to the first function, with an NSString* variable as a parameter, like this:
NSString *textFieldText = [[NSString alloc]
initWithFormat:#"%#", textField.text];
[self readFile:textFieldText];
edit 3 (NSLogs output)
line: Germany Italy France
search: Italy
I think that you are using the rangeOfString and the NSNotFound etc. correctly, so the problem is possibly to do with the creation of the string from the data read from the file using the appendFormat:#"%s".
I suspect there may be an encoding issue between your two string formats - I would investigate whether the "%s" encodes the null terminated C string properly into the same format as a unicode NSString with the appropriate encoding.
Try hard coding the value you are getting from the readNSString function as a string literal in code just for testing and see if that comparison works, if so this would tend to indicate it probably is something to do with the encoding of the string created from the file.
I have this array, NSSMutableArray *myarray, which has five objects in it, and I am using a loop like this:
for( className *myObject in myarray)
{
myTextview.text = [NSString stringWithFormat:#"the name is %#", myObject];
}
When I build and run, only the last name shows in my UITextView *myTextview. I logged it, and my loop is working fine -- it's showing all five objects.
The problem seems to be that each time an object is sent to the myTextView, the next object replaces it; is there a way I can hold all of them, so the whole array can be shown?
Each time you pass the loop you are replacing myTextview.text. What you want is to add to the string each time. Try this:
NSMutableString *string = [NSMutableString string];
for( className *myObject in myarray) {
[string appendString:[NSString stringWithFormat:#"the name is %#\n", myObject]];
}
myTextview.text = string;
I am creating an exercise app that will record the weight used and the number of "reps" the user did in 4 "Sets" per day over a period of 7 days so the user may view their progress.
I have built the database table named FIELDS with 2 columns ROW and FIELD_DATA and I can use the code below to load the data into the db. But the code has a sql statement that says,
INSERT OR REPLACE INTO FIELDS (ROW, FIELD_DATA)VALUES (%d, '%#');
When I change the statment to:
INSERT INTO FIELDS (ROW, FIELD_DATA)VALUES (%d, '%#');
Nothing happens. That is no data is recorded in the db.
Below is the code:
#define kFilname #"StData.sqlite3"
- (NSString *)dataFilePath
{
NSArray *paths = NSSearchPathForDirectoriesInDomains
(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
return [documentsDirectory stringByAppendingPathComponent:kFilname];
}
-(IBAction)saveData:(id)sender;
{
for (int i = 1; i <= 8; i++)
{
NSString *fieldName = [[NSString alloc]initWithFormat:#"field%d", i];
UITextField *field = [self valueForKey:fieldName];
[fieldName release];
NSString *insert = [[NSString alloc] initWithFormat:
#"INSERT OR REPLACE INTO FIELDS (ROW, FIELD_DATA)
VALUES (%d, '%#');",i, field.text];
// sqlite3_stmt *stmt;
char *errorMsg;
if (sqlite3_exec (database, [insert UTF8String],
NULL, NULL, &errorMsg) != SQLITE_OK)
{
// NSAssert1(0, #"Error updating table: %s", errorMsg);
sqlite3_free(errorMsg);
}
}
sqlite3_close(database);
}
So how do I modify the code to do what I want? It seemed like a simple sql statement change at first but obviously there must be more. I am new to Objective-C and iPhone programming.
I am not new to using sql statements as I have been creating web apps in ASP for a number of years.
Any help will be greatly appreciated, this is driving me nuts!
Suggestions:
write an insert statement with hardcoded values to see if the insert works
your filename has no path. does it assume the current directory when executed? what directory is it running from?
write a message to the screen if possible to see what the values you're getting are. Are they correct?