JSON representation of NSDictionary - objective-c

Question

In my app a user can create UITextFields. to each field a tag is added, so that the tags correspond to the cases: 1, 2, 3, 4, ... then I add everything in a NSDictionary, and a json representation:
-(IBAction)buttonDropBoxuploadPressed:(id)sender{
//screenshot
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"yyyy_MM_dd"];
NSString *filename = [NSString stringWithFormat:#"By: %# ",
[formatter stringFromDate:[NSDate date]]];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString* path = [documentsDirectory stringByAppendingPathComponent:
[NSString stringWithFormat:#"%#", filename] ];
//[data writeToFile:path atomically:YES];
//NSString *destDir = #"/sandbox/";
// [[self restClient] uploadFile:filename toPath:destDir
// withParentRev:nil fromPath:path];
// [[self restClient] loadMetadata:#"/sandbox/"];
//JSON
NSString *object;
NSString *object2;
NSString *object3;
NSString *object4;
NSString *object5;
NSString *object6;
NSString *object7;
NSString *object8;
NSString *object9;
NSString *object10;
NSString *object11;
NSString *object12;
NSString *object13;
NSString *object14;
NSString *object15;
for (UITextField *text in messagename) {
int touchedtag = text.tag;
NSUInteger tagCount = touchedtag;
switch (tagCount) {
case 1:
object = [NSString stringWithFormat:#"%#", text.text];
break;
case 2:
object2 = [NSString stringWithFormat:#"%#", text.text];
break;
case 3:
object3 = [NSString stringWithFormat:#"%#", text.text];
break;
case 4:
object4 = [NSString stringWithFormat:#" %#", text.text];
break;
case 5:
object5 = [NSString stringWithFormat:#"%#", text.text];
break;
case 6:
object6 = [NSString stringWithFormat:#"%#", text.text];
break;
case 7:
object7 = [NSString stringWithFormat:#"%#", text.text];
break;
case 8:
object8 = [NSString stringWithFormat:#"%#", text.text];
break;
case 9:
object9 = [NSString stringWithFormat:#"%#", text.text];
break;
case 10:
object10 = [NSString stringWithFormat:#"%#", text.text];
break;
case 11:
object11 = [NSString stringWithFormat:#"%#", text.text];
break;
case 12:
object12 = [NSString stringWithFormat:#"%#", text.text];
break;
case 13:
object13 = [NSString stringWithFormat:#"%#", text.text];
break;
case 14:
object14 = [NSString stringWithFormat:#"%#", text.text];
break;
case 15:
object15 = [NSString stringWithFormat:#"%#", text.text];
break;
default :
break;
}
}
//arrays
NSString * objects[] = { object, object2, object3, object4, object5, object6, object7, object8, object9, object10, object11, object12, object13, object14, object15};
NSMutableArray *textnameobject = [[NSMutableArray alloc] initWithCapacity:b];
textnameobject = [NSMutableArray arrayWithObjects:objects count:b];
NSMutableArray *textnamekeys = [[NSMutableArray alloc] initWithCapacity:b];
NSString * textnumber[] = {#"title", #"title", #"title",#"title", #"title", #"title", #"title", #"title", #"title", #"title", #"title", #"title", #"title", #"title"};
textnamekeys = [NSMutableArray arrayWithObjects:textnumber count:b];
//arrays
NSDictionary *jsonDictionary = [NSDictionary dictionaryWithObject: textnameobject forKey:textnamekeys];
/*
NSArray *objects2 = [NSArray arrayWithObjects:jsonDictionary, nil];
NSArray *keys2 = [NSArray arrayWithObjects:allkeys, nil];
NSDictionary *mainDict = [NSDictionary dictionaryWithObjects:objects2 forKeys:keys2];
*/
NSString* jsonString = [jsonDictionary JSONRepresentation];
NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
[jsonData writeToFile:path atomically:YES];
NSString *destDir = #"/sandbox/";
[[self restClient] uploadFile:filename toPath:destDir
withParentRev:nil fromPath:path];
[[self restClient] loadMetadata:#"/sandbox/"];
//JSON
}
When I press the button I get the following error:
JSONRepresentation failed. Error trace is: (
"Error Domain=org.brautaset.JSON.ErrorDomain Code=1 \"JSON object key must be string\" UserInfo=0x2e8370 {NSLocalizedDescription=JSON object key must be string}"
)
and consequentially a dropbox error. this worked on my previous app and the code is exactly the same. the json library is added correctly. I can't understand!! Please help!

Answer 1

Your code, rewritten.
- (IBAction)buttonDropBoxUploadPressed: (id)sender
{
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat: #"yyyy_MM_dd"];
NSString *filename = [NSString stringWithFormat: #"By: %# ", [formatter stringFromDate: [NSDate date]]];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex: 0];
NSString *path = [documentsDirectory stringByAppendingPathComponent: filename];
NSMutableDictionary *titles = [NSMutableDictionary dictionary];
for (UITextField *textField in messagename)
{
[titles setObject: textField.text forKey: #"title"];
// as you can see, here you're replacing the value # at key "title" with a new object on every pass
}
NSString *jsonString = [titles JSONRepresentation];
NSData *jsonData = [jsonString dataUsingEncoding: NSUTF8StringEncoding];
[jsonData writeToFile: path atomically: YES];
NSString *destDir = #"/sandbox/";
[[self restClient] uploadFile: filename toPath: destDir withParentRev: nil fromPath: path];
[[self restClient] loadMetadata: #"/sandbox/"];
}
However, regarding my comment, you're not actually serializing your text fields' text into anything usable. At the end of this, at best, you'll have something that looks like this:
{
"title": "My Text Field Value"
}
Though I'm also relatively certain that one or more of your text fields' text is nil, which is causing your JSON problem.