I am reading info from a sqlite database to a .csv file. I am able to get the file to build, but each new line starts with a ",". I have done some android programming, but not much ios. I am thinking that the issue is componentsJoinedByString:#"," since it joins everything together, but I am not sure how to get rid of the "," at the beginning of each new line using this. Is there another way to join them to write to a csv file or a way to get rid of the first comma?
NSMutableArray *exportBike = [[NSMutableArray alloc] init];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docsPath = [paths objectAtIndex:0];
NSString *path = [docsPath stringByAppendingPathComponent:#"MemberDB.sql"];
FMDatabase *database = [FMDatabase databaseWithPath:path];
[database open];
FMResultSet *resultsBike = [database executeQuery:#"SELECT * FROM bike"];
while([resultsBike next]) {
NSString *name = [resultsBike stringForColumn:#"name"];
NSInteger stage1HR = [resultsBike intForColumn:#"stage1HR"];
NSInteger stage1BP = [resultsBike intForColumn:#"stage1BP"];
NSInteger stage2HR = [resultsBike intForColumn:#"stage2HR"];
NSInteger stage2BP = [resultsBike intForColumn:#"stage2BP"];
NSInteger stage3HR = [resultsBike intForColumn:#"stage3HR"];
NSInteger stage3BP = [resultsBike intForColumn:#"stage3BP"];
NSInteger stage4HR = [resultsBike intForColumn:#"stage4HR"];
NSInteger stage4BP = [resultsBike intForColumn:#"stage4BP"];
NSInteger stage5HR = [resultsBike intForColumn:#"stage5HR"];
NSInteger stage5BP = [resultsBike intForColumn:#"stage5BP"];
NSInteger stage6HR = [resultsBike intForColumn:#"stage6HR"];
NSInteger stage6BP = [resultsBike intForColumn:#"stage6BP"];
NSInteger stage7HR = [resultsBike intForColumn:#"stage7HR"];
NSInteger stage7BP = [resultsBike intForColumn:#"stage7BP"];
NSInteger recoveryHR = [resultsBike intForColumn:#"recoveryHR"];
NSLog(#"%#,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",name, stage1HR, stage1BP, stage2HR, stage2BP, stage3HR, stage3BP, stage4HR, stage4BP, stage5HR, stage5BP, stage6HR, stage6BP, stage7HR, stage7BP, recoveryHR);
[exportBike addObject:[NSString stringWithFormat:#"%#,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d""\n",name, stage1HR, stage1BP, stage2HR, stage2BP, stage3HR, stage3BP, stage4HR, stage4BP, stage5HR, stage5BP, stage6HR, stage6BP, stage7HR, stage7BP, recoveryHR]];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *savePath = [paths objectAtIndex:0];
savePath = [savePath stringByAppendingPathComponent:#"bike.csv"];
[[exportBike componentsJoinedByString:#","] writeToFile:savePath atomically:YES encoding:NSUTF8StringEncoding error:NULL];
Change
[exportBike addObject:[NSString stringWithFormat:#"%#,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d""\n",name, stage1HR, stage1BP, stage2HR, stage2BP, stage3HR, stage3BP, stage4HR, stage4BP, stage5HR, stage5BP, stage6HR, stage6BP, stage7HR, stage7BP, recoveryHR]];
[[exportBike componentsJoinedByString:#","] writeToFile:savePath atomically:YES encoding:NSUTF8StringEncoding error:NULL];
to
[exportBike addObject:[NSString stringWithFormat:#"%#,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",name, stage1HR, stage1BP, stage2HR, stage2BP, stage3HR, stage3BP, stage4HR, stage4BP, stage5HR, stage5BP, stage6HR, stage6BP, stage7HR, stage7BP, recoveryHR]];
[[exportBike componentsJoinedByString:#"\n"] writeToFile:savePath atomically:YES encoding:NSUTF8StringEncoding error:NULL];
Instead of "," use "\n" in componentsJoinedByString method and in addObject line remove the "\n" at the end.
As Martin mentioned below, another option is to keep the new line character in addObject line and use [exportBike componentsJoinedByString:#""]. This will add a new line character at the end of the file.
Related
I want to be able to view images from a web folder inside my iPhone app. I know how to view the images with a specific url (i.e. www.mywebsite.com/image.jpg). That's easy. I just don't know how to asynchronously load an array. Basically I need to view images with a specific sequence (i.e. mywebsite.com/image_001.jpg, image_002.jpg, image_003.jpg, etc). There may be 10 or 100 images in a folder with that sequence. How do I let my app load images with a sequence?
Following code will sort images of this file format "imageName_number.jpg"
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *webDir=[documentsDirectory stringByAppendingPathComponent:#"WebFolder"];
NSFileManager *filemgr;
NSMutableArray *fileNum;
fileNum=[[NSMutableArray alloc]init];
filemgr = [NSFileManager defaultManager];
//This will give all files of your web directory you can uncomment to get dynamically
//NSArray *filelist = [filemgr contentsOfDirectoryAtPath: webDir error: nil];
// this is just example shows how unsorted will be used to sort image no you can comment this line
NSArray *filelist=[[NSArray alloc]initWithObjects:#"abc_001.jpg",#"def_005.jpg",#"abc_002.jpg",#"abc_0103.jpg",#"abc_0010.jpg",#"abc_008.jpg", nil];
int count = (int)[filelist count];
NSMutableDictionary *dictFileNumWithPath=[[NSMutableDictionary alloc]init];
NSString *imageSeprator=#"_";
for (int i = 0; i < count; i++){
NSString *imageName=[filelist objectAtIndex: i];
if (!([imageName rangeOfString:imageSeprator].location == NSNotFound)) {
NSRange startRange = [imageName rangeOfString:imageSeprator];
NSRange endRange = [imageName rangeOfString:#".jpg"];
NSRange searchRange = NSMakeRange( startRange.location+1, endRange.location-endRange.length);
NSString *strNum= [imageName substringWithRange:searchRange];
NSString *webPath=[webDir stringByAppendingPathComponent:imageName];
[dictFileNumWithPath setObject:[NSNumber numberWithInt:[strNum intValue]] forKey:webPath];
}
}
NSArray *sortedKeysFilePathArray =
[dictFileNumWithPath keysSortedByValueUsingSelector:#selector(compare:)];
NSLog(#"%#", sortedKeysFilePathArray);
I am trying to write the array data into excel (actually it is a CSV, but it is opened in excel). I used the following code to do that:
NSMutableArray *list;
list = [[NSMutableArray alloc] init];
NSString *string = [list componentsJoinedByString:#","];
NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *appFile = [documentsDirectory stringByAppendingPathComponent:#"yourFileName.csv"];
[data writeToFile:appFile atomically:YES];
It works fine, but the problem is I have 20 objects in my 'list' array and all those 20 objects are written in side by side cells. What I want is to write the first 4 objects in one line and then move to the new line and again write the next 4 objects in that line till all the objects in the list array are completed.
Can anyone help me with this issue?
NSMutableArray *list = ...
NSMutableString *buffer = [NSMutableString string];
for (NSUInteger i = 0; i < list.count; i++) {
NSString *value = list[i];
if (i > 0) {
if (i % 4 == 0) { //after every 4th value
buffer.append("\n"); //end line
}
else {
buffer.append(",");
}
}
buffer.append(value);
//if your values contain spaces, you should add quotes around values...
//buffer.appendFormat(#"\"%#\"", value);
}
NSData *data = [buffer dataUsingEncoding:NSUTF8StringEncoding];
...
To break lines in CSV just input a \r\n in the "end of the line". Be caerfull because in the mac you only need \r or \n (not really sure right now)
I have a problem with data who are exported to a csv file.
It concerns the data with accented characters. Type Data is string.
in my file i have this :
Téléphones et internet; Abonnement iPad; 13,90 €; Débit
I would like to have :
Téléphones et internet; Abonnement iPad; 13,90€ Débit
what code should be used to do this?
Thank you.
EDIT : my code
NSMutableString *writeString = [NSMutableString string];
for (id object in [[self fetchedResultsController] fetchedObjects]) {
NSString * object1 = [[object valueForKey:#"object1Data"] description];
NSString * object2 = [[object valueForKey:#"object2Data"] description];
NSString * object3 = [[object valueForKey:#"object3Data"] description];
NSString * object4 = [[object valueForKey:#"object4Data"] description];;
[writeString appendString:[NSString stringWithFormat:#"%#; %#; %#; %#\n", object1, object2, object3, object4]];
}
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString* savePath = [paths objectAtIndex:0];
savePath = [savePath stringByAppendingPathComponent:#"objectData.csv"];
[writeString writeToFile:savePath atomically:YES encoding:NSUTF8StringEncoding error:NULL];
EDIT2 : for viewing i use his :
QLPreviewController *previewController=[[QLPreviewController alloc]init];
previewController.delegate=self;
previewController.dataSource=self;
[self presentViewController:previewController animated:YES completion:nil];
[previewController.navigationItem setRightBarButtonItem:nil];
- (id <QLPreviewItem>)previewController:(QLPreviewController *)controller previewItemAtIndex:(NSInteger)index
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString* savePath = [paths objectAtIndex:0];
savePath = [savePath stringByAppendingPathComponent:#"objectData.csv"];
return [NSURL fileURLWithPath:savePath];
}
- (NSInteger)numberOfPreviewItemsInPreviewController:(QLPreviewController *)controller
{
return 1;
}
Your output looks like it might be correct, the problem seems like it’s in how you are viewing it.
Are you importing it into Excel or something? Excel’s CSV import is very poor in my experience, and it won’t auto-detect incoming UTF-8 data.
It's likely the encoding that's causing an issue here.
As a side note it's a CSV = Comma Separated Values. You aren't putting the commas in .. ?
Change:
[writeString appendString:[NSString stringWithFormat:#"%#; %#; %#; %#\n", object1, object2, object3, object4]];
To:
[writeString appendString:[NSString stringWithFormat:#"%#;, %#;, %#;, %#\n", object1, object2, object3, object4]];
This will make the values appear in separate columns when opened in excel, unless you want it all in 1 column ... ?
I am quite new to iOS and Objective-c.
I am trying to auto generate a pList in my app that looks like this.
I've so far been able to create the file making it a normal Value => Key file if i replace my for loop by
for (NSString* exercisePictureName in bigPictureData) {
[data setObject:exercisePictureName forKey:exercisePictureName];
}
but my problem is that I have no idea how to structure the logic at the end of my loop to create a file structure like shown in the picture. As it has to be exact.
Could anyone point me in the right direction on how to structure my loop so that it creates the file with the right format????
- (void) createImageListFromSource {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"exercisePictures.plist"];
NSFileManager *fileManager = [NSFileManager defaultManager];
if (![fileManager fileExistsAtPath: path])
{
path = [documentsDirectory stringByAppendingPathComponent: [NSString stringWithFormat: #"exercisePictures.plist"] ];
}
//To insert the data into the plist
NSArray* bicepPictureData = [self getAllimagesThatStartWith:#"bicep-"];
NSArray* tricepPictureData = [self getAllimagesThatStartWith:#"tricep-"];
NSArray* absPictureData = [self getAllimagesThatStartWith:#"abs-"];
NSArray* chestPictureData = [self getAllimagesThatStartWith:#"chest-"];
NSArray* backPictureData = [self getAllimagesThatStartWith:#"back-"];
NSArray* bigPictureData = [bicepPictureData arrayByAddingObjectsFromArray:tricepPictureData];
bigPictureData = [bigPictureData arrayByAddingObjectsFromArray:absPictureData];
bigPictureData = [bigPictureData arrayByAddingObjectsFromArray:chestPictureData];
bigPictureData = [bigPictureData arrayByAddingObjectsFromArray:backPictureData];
NSArray* finalData = [[NSArray alloc] init];
for (NSString* exercisePictureName in bigPictureData) {
NSDictionary* data = [[NSDictionary alloc] initWithObjectsAndKeys:exercisePictureName,#"text",exercisePictureName,#"image", nil];
[finalData arrayByAddingObject:data];
NSLog(#"%#",data);
}
NSLog(#"%#",finalData);
[finalData writeToFile: path atomically:YES];
}
What you have is an array of dictionaries. Pseudocode to show the structure:
NSMutableArray* arr = [NSMutableArray array];
for (...) {
NSDictionary* d = #{#"image": something, #"text": somethingelse};
[arr addObject:d];
}
When you are all done, just save the array directly with writeToURL....
I have a NSArray in this way
myArray[0] = [string1, string2, string3, string4, mySecondArray, string5]; (at 0 position)
I write this array inside a txt file in this way
NSString *outputString = #"";
for (int i = 0; i< myArray.count; i++){
outputString = [outputString stringByAppendingString:[[[myArray objectAtIndex:i ] componentsJoinedByString:#"#"] stringByAppendingString:#";"]];
}
NSLog(#"string to write = %#", outputString);
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:#"Text.txt"];
NSError *error;
[outputString writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:&error];
then the result of NSLog is = (position 0 of myArray) (mySecond array is empty)
one#two#three#four#(
)#five;
I want to know:
Why the array wrap?
When I'll go to read this string how can I know that it's mySecondArray?
When you message componentsJoinedByString: on an NSArray object, it calls description on each of its objects and concatenates them in order. For NSString objects, they are the strings themselves. The array wraps because of the way the description method has been implemented.
As for identifying the array while you are reading the string back, I don't think it is possible. You should consider writing the array to the file rather i.e.
[[myArray objectAtIndex:0] writeToFile:filePath atomically:YES];
or
[myArray writeToFile:filePath atomically:YES];
depending on the requirement. This way you will be able to read the elements back properly.