iOS Can't get Dictionary values to an array - ios

Question

I have dictionary:
{
6 = (
{
id = 6;
name = Andrea;
},
{
id = 6;
name = Paolo;
}
);
8 = (
{
id = 8;
name = Maria;
}
);
67 = (
{
id = 67;
name = Francesco;
},
{
id = 67;
name = Sara;
}
);
}
I tried to get Values to array.
My code is:
NSArray *arrayNew= [result valueForKey:#"67"];
NSLog(#"Hello:%#",arrayNew);
But Always i got null value.
My complete code:
NSMutableArray *idArray=[[NSMutableArray alloc]init];
NSString* path = [[NSBundle mainBundle] pathForResource:#"File"
ofType:#"txt"];
NSString* content = [NSString stringWithContentsOfFile:path
encoding:NSUTF8StringEncoding
error:NULL];
NSMutableData *results11 = [content JSONValue];
NSLog(#"Check:%#",results11);
NSArray *array= [results11 valueForKeyPath:#"field"];
NSMutableDictionary* result = [NSMutableDictionary dictionary];
for (NSDictionary* dict in array)
{
NSNumber* anID = [dict objectForKey:#"id"];
if (![idArray containsObject:[dict objectForKey:#"id"]]) {
// do something
[idArray addObject:[dict objectForKey:#"id"]];
}
NSMutableArray* resultsForID = [result objectForKey:anID];
if (!resultsForID)
{
resultsForID = [NSMutableArray array];
[result setObject:resultsForID forKey:anID];
}
[resultsForID addObject:dict];
}
NSLog(#"Result:%#",result);
NSLog(#"ID arr:%#",idArray);
// NSArray *temp= [results11 valueForKeyPath:#"Response.alertHistory"];
NSString *arrayNew= [result valueForKeyPath:#"67"];
NSLog(#"Hello:%#",arrayNew);
File.txt : {
"field": [
{
"id": 6,
"name": "Andrea"
},
{
"id": 67,
"name": "Francesco"
},
{
"id": 8,
"name": "Maria"
},
{
"id": 6,
"name": "Paolo"
},
{
"id": 67,
"name": "Sara"
}
]
}

Answer 1

Finally with reference of Tommy's solution I solved my issue.
NSArray *commentArray = result[#67];
And my final code:
NSMutableArray *idArray=[[NSMutableArray alloc]init];
NSString* path = [[NSBundle mainBundle] pathForResource:#"File"
ofType:#"txt"];
NSString* content = [NSString stringWithContentsOfFile:path
encoding:NSUTF8StringEncoding
error:NULL];
NSMutableData *results11 = [content JSONValue];
NSLog(#"Check:%#",results11);
NSArray *array= [results11 valueForKeyPath:#"field"];
NSMutableDictionary* result = [NSMutableDictionary dictionary];
for (NSDictionary* dict in array)
{
NSNumber* anID = [dict objectForKey:#"id"];
if (![idArray containsObject:[dict objectForKey:#"id"]]) {
// do something
[idArray addObject:[dict objectForKey:#"id"]];
}
NSMutableArray* resultsForID = [result objectForKey:anID];
if (!resultsForID)
{
resultsForID = [NSMutableArray array];
[result setObject:resultsForID forKey:anID];
}
[resultsForID addObject:dict];
}
NSLog(#"Result:%#",result);
NSMutableArray *arrayNew = [[NSMutableArray alloc] init];
for (int i=0; i<[idArray count]; i++) {
NSArray *commentArray = result[idArray[i]];
NSLog(#"COMM:%#",commentArray);
NSMutableArray *arr=[[NSMutableArray alloc]init];
for (NSDictionary* dict in commentArray)
{
[arr addObject:[dict objectForKey:#"name"]];
}
[arrayNew addObject:arr];
}
NSLog(#"ID arr:%#",idArray);
NSLog(#"Name arr:%#",arrayNew);
File.txt :
{
"field": [
{
"id": 6,
"name": "Andrea"
},
{
"id": 67,
"name": "Francesco"
},
{
"id": 8,
"name": "Maria"
},
{
"id": 6,
"name": "Paolo"
},
{
"id": 67,
"name": "Sara"
}
]
}
My final result:
ID arr:(
6,
67,
8
)
Name arr:(
(
Andrea,
Paolo
),
(
Francesco,
Sara
),
(
Maria
)
)

Answer 2

The most likely reason for this is that your NSDictionary uses integers, not NSStrings, as its keys. In this case this should work:
NSArray *arrayNew= [result objectForKey:#67]; // No quotes

Answer 3

NSMutableArray *arrayNew = [[NSMutableArray alloc] init];
NSArray *commentArray = [dictionary valueForKey:#"67"];
for (NSDictionary *commentDic in commentArray) {
Model *modelObj = [[Model alloc] init];
modelObj = [Model modelFromDictionary:commentDic];
[arrayNew addObject:modelObj]
}
Also you will have to create Model .h and .m class to do the mapping.
and modelFromDictionary method will do the mapping.
.m
#implementation Version
- (NSDictionary *)jsonMapping {
return [[NSDictionary alloc] initWithObjectsAndKeys:
#"id",#"id",
#"name",#"name",
nil];
}
+ (Model *)modelFromDictionary:(NSDictionary *)dictionary {
Model *model = [[Model alloc] init];
NSDictionary *mapping = [model jsonMapping];
for(NSString *attribute in [mapping allKeys]) {
NSString *classProperty = [mapping objectForKey:attribute];
NSString *attributeValue = [dictionary objectForKey:attribute];
if(attributeValue != nil && ![attributeValue isKindOfClass:[NSNull class]]) {
[model setValue:attributeValue
forKey:classProperty];
}
}
return model;
}
.h
#property (nonatomic, strong) NSString *id;
#property (nonatomic, strong) NSString *name;
+ (Model *)modelFromDictionary:(NSDictionary *)dictionary;