I have an NSMutableArray of NSMutableDictionary (it's a plist). Each dictionary in the array has 2 keys: 'id' and 'lu'.
How can I find the index in NSMutableArray of NSMutableDictionary where, for example, id = '47653'?
I tried to do it but it's not working:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
NSString *path = [basePath stringByAppendingPathComponent:#"id.plist"];
NSMutableArray *mut_array = [[NSArray arrayWithContentsOfFile:path] mutableCopy];
NSMutableDictionary *mut_dico = [[NSMutableDictionary alloc] init];
NSString *egalIDPlistData = [contentDictio objectForKey:#"id"];
for(mut_dico in mut_array) {
if([[mut_dico objectForKey:#"id"] isEqualToString:#"47653"]) {
NSLog(#"Test");
}
}
NSMutableArray *mut_array = [[NSArray arrayWithContentsOfFile:path] mutableCopy]; will create a mutable array of immutable dictionaries, not mutable dictionaries. mutableCopy is not a deep copy.
Regardless of mutability, the following will do what you want:
NSUInteger indexOfDictionary = [[array valueForKey:#"id"] indexOfObject:#"49711"];
if(indexOfDictionary == NSNotFound)
{
NSLog(#"no matching objects found!");
return;
}
NSDictionary *fullDictionary = [array objectAtIndex:indexOfObject];
The valueForKey: uses the fact that a key-value coding call on an array returns an array of the results of that call on each object in the array, in the same order, and the fact that NSDictionary will respond similarly in this situation to both valueForKey: and objectForKey:
As for the issue of whether what you're really dealing with is strings or numbers, try using just #49711 in place of #"49711" and if that works instead you've got numbers.
In your log id is 49711 & in your if condition it is 47653. Your condition will not satisfy until there is dictionary in your array with id = 47653
The objects in the loaded plist are not mutable.
Try:
for(NSDictionary * dict in mut_array)
{
if([[dict objectForKey:#"id"] isEqualToString:#"49711"]) {
NSLog(#"Test");
}
}
Related
I am parsing a CSV file multiple times with for loop, here I need to store these arrays one by one dictionary. There are very less questions in stack about adding NSArray to NSDictionary. I am parsing CSV with below code but I strucked at storing in NSDictionary, The program is terminating and showing warning at assigning string to dictionary
for (i=0; i<=57; i++) {
NSString *keysString = [csvArray objectAtIndex:i];
NSArray *keysArray = [keysString componentsSeparatedByString:#","];
NSLog(#"Serail No %d %#",i,keysArray);
NSString *string = [NSString stringWithFormat:#"%d", i];
NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithObjects: keysArray forKeys: string];
}
NSMutableDictionary *dict = [[NSMutableDictionary alloc]init];
for (i=0; i<=57; i++) {
NSString *keysString = [csvArray objectAtIndex:i];
NSArray *keysArray = [keysString componentsSeparatedByString:#","];
NSString *key = [NSString stringWithFormat:#"serial%d",i];
[dict setObject:keysArray forKey:key];
}
To get back data from dictionary,
NSArray *array = [dict valueForKey:#"serial24"];//to get array 24.
If I understand you correctly, you want to add the arrays to a dictionary, with the key being the string value of integer i ? What you need to do is allocate the dictionary outside your loop -
NSMutableDictionary *dict=[NSMutableDictionary new];
for (i=0; i<=57; i++) {
NSString *keysString = [csvArray objectAtIndex:i];
NSArray *keysArray = [keysString componentsSeparatedByString:#","];
NSLog(#"Serial No %d %#",i,keysArray);
NSString *string = [NSString stringWithFormat:#"%d", i];
dict[string]=keysArray;
}
I am not sure why you would want to do this, because this is basically an array. You could simply do -
NSMutableArray *outputArray=[NSMutableArray new];
for (NSString *keysString in csvArray) {
NSArray *keysArray = [keysString componentsSeparatedByString:#","];
[outputArray addObject:keysArray];
}
I have this plist file
I need to make an array containing the arrays in the plist, so the array should have the values "numbers" & "colors" .
I tried this code but didn't work
- (NSString *) dataFilePath {
NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentDirectory = [path objectAtIndex:0];
return [documentDirectory stringByAppendingPathComponent:#"groups.plist"];
}
- (void) readPlist {
NSString *path = [self dataFilePath];
NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:path];
NSArray *tempArray = [dict objectForKey:#"Root"];
NSLog(#"%#", tempArray);
}
calling the readPlist from ViewDidLoad Method
any idea how to do it ?
Instead of
NSArray *tempArray = [dict objectForKey:#"Root"];
NSLog(#"%#", tempArray);
use
NSArray *tempArray = [dict allKeys];
NSLog(#"%#", tempArray);
Note that the order of the elements in the array is not defined, see the documentation of NSDictionary,
"Root" is just a label from Xcode.
Ensure that the groups.plist file exists in the Documents Directory and not in your Bundle Directory.
Ensure that the dict is not nil and is actually a dictionary object as you expect.
Have you tried [dict objectForKey:#"numbers"]?
I am using this code to add content into a plist :
//////////// Save data into plist /////////////////
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:#"datatesting.plist"];
NSLog(#"path='%#'",path);
NSFileManager *nfm = [[NSFileManager alloc] init];
if([nfm fileExistsAtPath:path])
{
// if file exists, get its contents, add more entries and write back
NSMutableArray *array = [[NSMutableArray alloc] initWithContentsOfFile:path];
NSArray *keys = [NSArray arrayWithObjects:#"Title",#"Description",#"Coordinate",nil];
[array addObject:[NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:[NSString stringWithFormat:#"%#",titlestring],[NSString stringWithFormat:#"%#",descriptionstring],[NSString stringWithFormat:#"%#",coordinadastring], nil] forKeys:keys]];
NSLog(#"modified array=%#",array);
BOOL ok = [array writeToFile:path atomically:YES];
if(!ok){
NSLog(#"Unable to write appended file");
return;
}
} else {
// if file doesn't exist, create a new one
NSMutableArray *array = [[NSMutableArray alloc] init];
NSArray *keys = [NSArray arrayWithObjects:#"Title",#"Description",#"Coordinate",nil];
[array addObject:[NSDictionary dictionaryWithObjects:[NSArray arrayWithObjects:[NSString stringWithFormat:#"%#",titlestring],[NSString stringWithFormat:#"%#",descriptionstring],[NSString stringWithFormat:#"%#",coordinadastring], nil] forKeys:keys]];
NSLog(#"new array=%#",array);
BOOL ok = [array writeToFile:path atomically:YES];
if(!ok){
NSLog(#"Unable to write new file");
return;
}
}
Now I am having issues in using the content of the plist. So my two questions are :
- What is the Keys of the dictionaries of the current plist ?
- What is the way to read the content in a Tableview ?
You have an array of dictionaries. You need to iterate on the contents of the array, then look at each dictionary. You can do this with block enumerators or the older for() style. I'll use the latter now as you may not know blocks.
NSArray *array = ...; // read in the array from the file
for(NSDictionary *dict in array) {
NSString *title = [dict objectForKey:#"Title"];
... etc
}
When you want to show this data in a tablview, the number of rows is the number of dictionaries (ie [array count]). If you wanted to show just the title for each cell, you would get the cell row number, then get the dictionary by [array objectAtIndex:cellRow]), then pull out the title as above.
This question already has an answer here:
Closed 10 years ago.
Possible Duplicate:
How to populate UITableView with plist
I save data to plist like this:
- (IBAction)save:(id)sender
{
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
NSString *plistPath = [documentsPath stringByAppendingPathComponent:#"data.plist"];
NSMutableArray *data = [NSMutableArray arrayWithContentsOfFile:plistPath];
if (nil == data) {
data = [[NSMutableArray alloc] initWithCapacity:0];
}
else {
[data retain];
}
NSMutableDictionary *array = [[NSMutableDictionary alloc]init];
[array setObject:label1.text forKey:#"Test1"];
[array setObject:label2.text forKey:#"Test2"];
[array setObject:label3.text forKey:#"Test3"];
[array setObject:label4.text forKey:#"Test4"];
NSLog(#"%#", array);
[data addObject:array];
[array release];
[data writeToFile:plistPath atomically: TRUE];
[data release];
}
NSLog:
2012-07-01 18:52:19.566 testapp[22651:707] {
Test1 = 40;
Test2 = 102;
Test3 = 153;
Test4 = 255;
}
How can I load saved data to uitableview?
To read it, do this:
NSMutableDictionary* plistDict = [[NSMutableDictionary alloc] initWithContentsOfFile:plistPath];
You should then be able to read the values for all the keys like this:
NSString *myValue = [plistDict objectForKey:#"someKey"];
edit:
After rereading your code it seems like you might be doing something you don't want to do. Your current plist structure is a top level array that adds a dictionary to itself every time you invoke "save". Is this what you're trying to do? If so, what represents a cell in your table, an index in the array?
If so, then you want to do
// top level array
NSMutableDictionary* plistArray = [[NSMutableDictionary alloc] initWithContentsOfFile:plistPath];
// individual dictionary at one array index (such as indexPath.row in cellForRowAtIndexPath)
NSMutableDictionary *dictionary = [plistArray objectAtIndex:yourIndex];
In any case, the object you have named "array" is actually a dictionary so you should rename it (or change it to be an array if that's what you want).
Can I read just the key from plist without its value, also if I know the value can I read the key ?
Reading .plist:
NSString *path = [[NSBundle mainBundle] pathForResource:#"myPlist" ofType:#"plist"];
NSMutableDictionary *myDictionary = [[NSMutableDictionary alloc] initWithContentsOfFile:path];
Getting all keys and all values:
NSArray* allmyKeys = [myDictionary allKeys];
NSArray* allmyValues= [myDictionary allValues];
Getting all keys for an values object:
NSArray* allmyKeys = [myDictionary allKeysForObject:myValueObject];
As an alternative, you can use allKeysForObject: method which returns,
A new array containing the keys corresponding to all occurrences of anObject in the dictionary. If no object matching anObject is found, returns an empty array.
From that array you can get the key by invoking the objectAtIndex: method.
Use -[NSDictionary allKeysForObject:]*.
Example
NSArray *keys = [myDict allKeysForObject:#"My Value"];
if ([keys count] != 0) { // to prevent out-of-bounds crashes
NSString *key = [keys objectAtIndex:0];
return key;
} else {
return nil;
}
*Dunno why it returns an NSArray object instead of an NSSet object, because keys are not ordered. Oh well.
In order to read the values at app's installed folder:
NSString *PListName=#"ExamplePlist";
NSString *_PlistNameWithExtension=[NSString stringWithFormat:#"%#.plist",PlistName];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); //1
NSString *documentsDirectory = [paths objectAtIndex:0]; //2
NSString *path = [documentsDirectory stringByAppendingPathComponent:_PlistNameWithExtension]; //3
NSDictionary *myDictionary = [[NSDictionary alloc] initWithContentsOfFile:path];
NSLog(#"%#",[myDictionary description]);
NSArray *AllKeys=[myDictionary allKeys];
Jhaliya's method has not worked for me, then I tried this method.