I have a problem when I try to combine 2 NSString
I extract 2 NSSring form a JSON and its diagrams are:
thumbList: ( "picture1.jpg", "picture2.jpg", "picture3.jpg" ... )
fullnameList: ("name1", "name2" , "name3" ... )
My intention is unite them into one using the following scheme:
("name1", "picture1.jpg", "name2", "picture2.jpg", "name3", "picture3.jpg"...)
NSArray *array_webdata=[[NSArray array] init];
NSString *searchStatus = [[NSString alloc] initWithData:webData encoding:NSUTF8StringEncoding];
array_webdata = [parsedata objectWithString:searchStatus error:nil];
//String with all data of each user
NSString *usersList = [array_webdata valueForKey:#"results"];
NSLog(#"\n results? = %# \n", usersList);
//String with thumbs
NSString *thumbList = [usersList valueForKey:#"thumb"];
NSLog(#"\n thumbs? = %# \n", thumbList);
//String with usernames
NSString *fullnameList = [usersList valueForKey:#"fullname"];
NSLog(#"\n fullnames? = %# \n", fullnameList);
NSMutableIndexSet *indexes = [NSMutableIndexSet indexSetWithIndex:1];
[indexes addIndex:3];
[fullnameList insertObjects:thumbList atIndexes:indexes];
NSLog(#"array: %#", fullnameList);
But when I try to execute shows the next error message: [__NSArrayI insertObjects:atIndexes:]: unrecognized selector sent to instance.
Can anyone help me?
You should use
NSMutableDictionary* dataDict = [NSMutableDictionary dictionaryWithObjects:picturesList forKeys:namesList];
// Whenever key needed for fetching record from Dictionary just write
NSArray* keyArr = [dataDict AllKey];
Now you have all key and you can fetch record with the help of above key.
All "unrecognized selector sent to instance." errors mean the same: you think some object has a method, but it really don't have it at runtime.
Due to the dynamic nature of Objective-C, if you're not sure of some object having a method you should always test it calling respondsToSelector: like this:
if ([myObj respondsToSelector:#selector(someMethod)]) {
[myObj someMethod];
}
In this case,
NSString *fullnameList = [usersList valueForKey:#"fullname"];
is a NSString. That class does not have a insertObjects:atIndexes: method. Maybe you have to declare it as an NSMutableArray
Related
I have the following Array which retrieved from the Core Data :
NSArray *dataArray = [context executeFetchRequest:request error:&error];
so I wrote this code to get each row data individually to send it to REST API:
for (NSString *str in dataArray) {
NSString *name =[dataArray valueForKey:#"name"];
NSString *dob = [dataArray valueForKey:#"dob"];
int gender =[[dataArray valueForKey:#"gender"]integerValue];
NSString *childId =[dataArray valueForKey:#"id"];
int response = [network sendName:name withDateOfBirth:dob andGender:gender forID:childId];
if (response == 200) {
// [self performSelectorOnMainThread:#selector(postSuccess) withObject:nil waitUntilDone:YES];
NSLog(#"Success");
}
}
but it's not working, because I couldn't know how data is stored in each index in the array!!
Please help, and if I am not doing this correctly please tell me a better way to do it.
Thanks.
NSString *name =[dataArray valueForKey:#"name"];
This doesn't do what you think it'll do. valueForKey:, when sent to an array, returns an array of the values corresponding to the given key for all the items in the array. So, that line will assign an array of the "name" values for all the items in dataArray despite the fact that you declared name as a NSString. Same goes for the subsequent lines.
What you probably want instead is:
for (NSManagedObject *item in dataArray) {
NSString *name = [item valueForKey:#"name"];
...
Better, if you have a NSManagedObject subclass -- let's call it Person representing the entity you're requesting, you can say:
for (Person *person in dataArray) {
NSString *name = person.name;
...
which leads to an even simpler version:
for (Person *person in dataArray) {
int response = [network sendName:person.name
withDateOfBirth:person.dob
andGender:person.gender
forID:person.id];
although I'd change the name of that method to leave out the conjunctions and prepositions. -sendName:dateOfBirth:gender:id: is enough, you don't need the "with", "and", and "for."
I am trying to draw the route on the graphic layer of my app application and i do not know is this the right approach to do it, or is there another way to do it? Where i am trying to use NSArray with ArgGIS to draw out the map am i have problem with it.
*edit I tried to change the NSArray back to a JSON string and try to draw it using ArcGIS with a JSON string
This is what i have done:
NSArray *BusRoute=[jsonResult objectForKey:#"BusRoute"];
int i;
int count = [BusRoute count];
for (i = 0; i < count; i++)
{
NSDictionary *dic = [BusRoute objectAtIndex: i];
NSString *Duration = [dic valueForKey:#"Duration"];
//---PATH---
NSArray *PATH = [dic valueForKey:#"PATH"];
NSLog(#"PATH = %#", PATH);
self.path = PATH;
}
NSError *writeError = nil;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:path options:NSJSONWritingPrettyPrinted error:&writeError];
NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
NSLog(#"JSON Output: %#", jsonString);
if (self.jsonString) {
// symbolize the returned route graphic
self.jsonString.routeGraphic.symbol = [self routeSymbol];
// add the route graphic to the graphic's layer
[self._graphicsLayer addGraphic:self.jsonString.routeGraphic];
// tell the graphics layer to redraw
[self._graphicsLayer dataChanged];
}
*Output for JSON string
JSON Output: [
[
"38909,35576;38872,35589;38861,35593;38848,35597;38697,35650;38695,35651;38695,35651;38609,35681;38583,35689;38553,35697;38508,35700;38476...;29560,40043"
]
]
This is a portion of the path that i have to draw on the map:
PATH = (( "38909,35576;38872,35589;38861,35593;38848,35597;38697,35650;38695,35651;38695,35651;38609,35681;38583,35689;38553,35697;38508,35700;38476,35696;38476,35696;....))
for this line self.jsonData.routeGraphic.symbol = [self routeSymbol]; i am getting an error Property 'Property 'jsonData' not found on object of type 'MapViewController *'
what should i do to solve? pls help
*How can i draw the line of the path using the NSArray and using ArcGIS?
routeGraphic property does not have any association with NSArray Class. NSArray is the Collection.
Your code is a little strange.
what is routeGrphic???
Are not you forgotten the like code below?
YourObject *object = [path objectAtIndex:index];
object.routeGraphic.symbol = [self routeSymbol];
I have this plist that I have created
I have written most of my controller class which gets this plist and loads it into the documents directory so its possible to read/write to is.
Currently I have the reading working fine, and I used to have the writing working also, however I have just recently changed one of the objects (cache value) to a Dictionary with values related to that. Now when I try to write to this plist my app is crashing.
This is the error I am getting.
2012-04-05 09:26:18.600 mycodeTest[874:f803] * Terminating app due to
uncaught exception 'NSInvalidArgumentException', reason: '*
-[NSDictionary initWithObjects:forKeys:]: count of objects (4) differs from count of keys (5)'
*** First throw call stack: (0x12cc022 0x1884cd6 0x1248417 0x12685e2 0x19844 0x17e86 0x17669 0x13b67 0xe53a49 0xe51e84 0xe52ea7 0xe51e3f
0xe51fc5 0xd96f5a 0x1d2aa39 0x1df7596 0x1d21120 0x1df7117 0x1d20fbf
0x12a094f 0x1203b43 0x1203424 0x1202d84 0x1202c9b 0x21aa7d8 0x21aa88a
0x450626 0x77ed 0x1e35 0x1) terminate called throwing an
exceptionCurrent language: auto; currently objective-c
with all of this in mind I will now show you my method, which is called from another class when it has the values ready to be saved.
//This method gets called from another class when it has new values that need to be saved
- (void) saveData:(NSString *)methodName protocolSignature:(NSString *)pSignature protocolVersion:(NSNumber *)pVersion requestNumber:(NSNumber *)rNumber dataVersionReturned:(NSNumber *)dvReturned cacheValue:(NSMutableDictionary *)cValue
{
// get paths from root direcory
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
// get documents path
NSString *documentsPath = [paths objectAtIndex:0];
// get the path to our Data/plist file
NSString *plistPath = [documentsPath stringByAppendingPathComponent:#"EngineProperties.plist"];
// set the variables to the values in the text fields that will be passed into the plist dictionary
self.protocol = pSignature;
self.Version = pVersion;
self.request = rNumber;
self.dataVersion = dvReturned;
//if statment for the different types of cacheValues
if (methodName == #"GetMan")
{
//cache value only returns the one cachevalue depending on which method name was used
[self.cacheValue setValue:cValue forKey:#"Man"]; //do I need to have the other values of cacheValue dictionary in here? if so how do I do that.
c
}
else if (methodName == #"GetMod")
{
[self.cacheValue setValue:cValue forKey:#"Mod"];
}
else if (methodName == #"GetSubs")
{
[self.cacheValue setValue:cValue forKey:#"Subs"];
}
// This is where my app is falling over and giving the error message
// create dictionary with values in UITextFields
NSDictionary *plistDict = [NSDictionary dictionaryWithObjects: [NSArray arrayWithObjects: protocol, pVersion, rNumber, dvReturned, cacheValue, nil] forKeys:[NSArray arrayWithObjects: #"Signature", #"Version", #"Request", #"Data Version", #"Cache Value", nil]];
NSString *error = nil;
// create NSData from dictionary
NSData *plistData = [NSPropertyListSerialization dataFromPropertyList:plistDict format:NSPropertyListXMLFormat_v1_0 errorDescription:&error];
// check is plistData exists
if(plistData)
{
// write plistData to our Data.plist file
[plistData writeToFile:plistPath atomically:YES];
NSString *myString = [[NSString alloc] initWithData:plistData encoding:NSUTF8StringEncoding];
NSLog(#"%#", myString);
}
else
{
NSLog(#"Error in saveData: %#", error);
// [error release];
}
}
I am abit lost when the error is saying that 4 keys differ from 5 when as far as i can tell i am applying 5 values to the dictionary any help would be appreciated.
Edit** another thing I noticed when debugging my issues was the fact it looks like I am not getting my cacheValue dictionary set up properly as its showing 0 key valuepairs??? is this right or wrong?
this is what happens when I log my plist in xcode as suggested below when I use [NSDictionary dictionaryWithObjectsAndKeys:..etc
Check setup is everything there?
Temp Dic output = {
Root = {
"Cache Value" = {
Manu = 0;
Mod = 0;
Sub = 0;
};
"Data Version returned" = 0;
"Signature" = null;
"Version" = 0;
"Request Number" = 0;
};
Run Man cache check results
Temp Dic output = {
"Version returned" = 5;
"Signature" = Happy;
"Version" = 1;
"Request Number" = 4;
as you can see Cache Value is completely missing after I have run the request.
I'm going to guess that cacheValue is nil when the crash occurs, resulting in only 4 objects in your values array, but 5 in keys.
Try using [NSDictionary dictionaryWithObjectsAndKeys:] instead.
In a situation like this, break up your code. Do each piece on a separate line, with temporary variables.
Put your keys and your values into temporary arrays.
Lot the values of everything, or set breakpoints in the debugger and examine all your values. Eli is almost certainly right that cacheValue is nil. The arrayWithObjects method stops on the first nil.
This code:
NSString *string1 = #"string 1";
NSString *string2 = #"string 2";
NSString *string3 = #"string 3";
NSString *string4 = nil;
NSString *string5 = #"string 5";
NSArray *anArray = [NSArray arrayWithObjects:
string1,
string2,
string3,
string4,
string5,
nil];
NSLog(#"anArray has %d elements", [anArray count]);
Will only show 3 elements in the array, even though the arrayWithObjects line appears to add 5 elements
I am trying to pars the json data and display in table
My JSON data is like this
{"isError":false,"ErrorMessage":"","Result":{"Count":4,"Data":[{"ContentID":"127_30_1309793318065","ContentTypeID":1,"UserCaption":"Gandhinagar(Kanjurmarg)","UserComment":"central\n","DateRecorded":"\/Date(1309793318000+0530)\/","Data":"","ShareType":true,"Views":0,"PlayTime},{},{},{}];};isError = 0;}
I am prasing like this
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSString *loginStatus = [[NSString alloc] initWithBytes: [webData mutableBytes] length:[webData length] encoding:NSUTF8StringEncoding];
NSLog(#"%#",loginStatus);
//this is for the getting the data from the server with help of JSON
NSString *json_string = [[NSString alloc] initWithData:webData encoding:NSUTF8StringEncoding];
NSDictionary *result = [json_string JSONValue];
/
//this for holding the Array value which come from the server
NSMutableArray *results = [[NSMutableArray alloc] init];
for (int index = 0; index<[reviewsvalues count]; index++)
{
NSMutableDictionary * value = [reviewsvalues objectAtIndex:index];
ReviewsResult * result = [[ReviewsResult alloc] init];
result.User_Caption = [value objectForKey:#"UserCaption"];
result.ContentType_Id = [value objectForKey:#"DateRecorded"];
result.Average_Rating = [value objectForKey:#"AverageRating"];
//OVER here MY APP GET CRASH
}
}
BUt it get crash and give error
[__NSCFDictionary objectAtIndex:]: unrecognized selector sent to instance
The problem is simple.
reviewsvalues should be an NSDictionary and you should not be calling objectAtIndex: for the reviewsvalues.
Instead you should call valueForKey like
int count = [[reviewsvalues valueForKey:#"Count"] intValue];
NSArray *reviewsArray = [reviewsvalues valueForKey:#"Data"];
int count = [reviewsArray count];
cell.textLabel.text = [[reviewsArray objectAtIndex:indexPath.row] valueForKey:#"ContentID"];
Hope this helps you.
Please let me know if you want more help on this.
You set reviewsvalues = [result objectForKey:#"Result"];
Which means reviewsvalues is now an NSDictionary.
"Result" is a dictionary, not an array:
{"Count":4,"Data":[...]}
NSDictionary doesn't respond to -objectAtIndex:, that's one of NSArray's methods.
You need another step:
NSArray *reviewsArray = [reviewsvalues objectForKey:#"Data"];
and while you are at it, you can use fast enumeration.
for (NSDictionary *review in reviewsArray) {
ReviewsResult * result = [[ReviewsResult alloc] init];
result.User_Caption = [review objectForKey:#"UserCaption"];
result.ContentType_Id = [review objectForKey:#"DateRecorded"];
result.Average_Rating = [review objectForKey:#"AverageRating"];
}
Edit: also, you should know that you've not coded this very defensively. What happens if the data isn't exactly as it is in your example? what happens if a value is missing, like "Data", or "Result"?
Your app should be robust enough to not choke if something slightly unexpected happens.
i have to create an 2images and 3 labels by using code (cgrectmake)and i am having X location, y location, width and height all are stored in arrays(which i have retrieved from the web services)how can i create the image and labels can any one help me
You can join the elements of an array together with the NSString componentsJoinedByString class method:
NSString myString = [myNSArray componentsJoinedByString:#"x"];
where x is the characters you'd like to appear between each array element.
Edited to add
So in your newly-added code if these are the label values:
lbl = #"zero"
lbl1 = #"one"
lbl2 = #"two"
and you want to join them together with a space character then if you did this:
NSString *temp = [labelArray componentsJoinedByString:#" "];
NSLog(#"temp = %#", temp);
then this is what would be logged:
zero one two
Edited to further add
If you are instead trying to join the label values together to make xml elements then you might do something like this:
NSString *joinedElements = [labelArray componentsJoinedByString:#"</label><label>"];
NSString *temp = [NSString stringWithFormat:#"<label>%#</label>", joinedElements];
NSLog(#"temp = %#", temp);
then this is what would be logged:
<label>zero</label><label>one</label><label>two</label>
may be this is usefull to you.
NSString *str;
str = [arrayName objectAtIndex:i(Index NO)];
OK by this easily you can access object from the array. any type of object u can fetch this way only reception object type are change in left side.
Best of Luck.
Most objects have a -description method which returns a string representation of the object:
- (NSString *)description;
For example:
NSArray *array = [NSArray arrayWithObjects:#"The", #"quick", #"brown", #"fox", nil];
NSLog(#"%#", array); // prints the contents of the array out to the console.
NSString *arrayDescription = [array description]; // a string
It would help to know what you want to do with the string (how will you use the string). Also, what kind of objects do you have in the array?
In that case, Matthew's answer is one possibility. Another might be to use an NSMutableString and append the individual items, if you need control over how the string is created:
NSMutableString *string = [NSMutableString string];
if ([array count] >= 3) {
[string appendString:[array objectAtIndex:0]];
[string appendFormat:#"blah some filler text %#", [array objectAtIndex:1]];
[string appendString:[array objectAtIndex:2]];
}