This is the output of an NSDictionary:
{
client = {
environment = mock;
"paypal_sdk_version" = "1.0.3";
platform = iOS;
"product_name" = "PayPal iOS SDK";
};
payment = {
amount = "39.95";
"currency_code" = USD;
"short_description" = "Awesome saws";
};
"proof_of_payment" = {
"adaptive_payment" = {
"app_id" = "APP-1245783590";
"pay_key" = "AP-70M62356425642W";
"payment_exec_status" = COMPLETED;
timestamp = "2012-03-03T15:53:55Z";
};
};
Its from Paypal Adaptive Payments. I ended up doing this:
- (void)verifyCompletedPayment:(PayPalPayment *)completedPayment {
NSDictionary *pOPDictionary = [NSDictionary dictionaryWithDictionary:completedPayment.confirmation];
NSLog(#"pOPDictionary: %#",pOPDictionary);
NSDictionary *subDictionary = [pOPDictionary objectForKey:#"proof_of_payment"];
NSDictionary *sub2Dictionary = [subDictionary objectForKey:#"adaptive_payment"];
NSString *proofString = [sub2Dictionary objectForKey:#"payment_exec_status"];
if ([proofString isEqualToString:#"COMPLETED"]) {
NSLog(#"Payment Completed Successfully");
} else {
NSLog(#"Payment Error");
}
NSData *confirmation = [NSJSONSerialization dataWithJSONObject:completedPayment.confirmation options:0 error:nil];
}
Is there a more efficient way to get that key from the dictionary of dictionary of dictionaries? I only really need that key. So i didnt think I should cycle or loop thru the others.
There are two 2 different possibilities how you can simplify the code. You can use the "Modern Objective-C subscripting syntax" (see http://clang.llvm.org/docs/ObjectiveCLiterals.html for more information):
NSDictionary *pOPDictionary = completedPayment.confirmation;
NSString *proofString = pOPDictionary[#"proof_of_payment"][#"proof_of_payment"][#"payment_exec_status"];
Or Key-Value Coding:
NSDictionary *pOPDictionary = completedPayment.confirmation;
NSString *proofString = [pOPDictionary valueForKeyPath:#"proof_of_payment.proof_of_payment.payment_exec_status"];
I don't think that there is an advantage of one over the other, it is just a matter of
taste which one you choose.
Related
Im quite new to iOS and objective.. heres my question..
if my array looks like this:
myArray = {
parentdict = {
childdict = {
aname = "Aname";
bname - "Bname";
cname = "Cname";
};
childarray = {
{
counter = "1";
close = "25236";
},
{
counter = "2";
close = "12458";
};
};
};
},
{
parentdict = {
childdict = {
aname = "Aname";
bname - "Bname";
cname = "Cname";
};
childarray = {
{
counter = "1";
close = "28556";
},
{
counter = "2";
close = "12118";
};
};
};
},
{
parentdict = {
childdict = {
aname = "Aname";
bname - "Bname";
cname = "Cname";
};
childarray = {
{
counter = "1";
close = "24356";
},
{
counter = "2";
close = "155628";
};
};
};
};
basically its an array of nested dictionary and inside one of the dictionary contains an array of dictionary (childarray) if i want to sort myArray by #"close" of array index 1, which is the one next to counter 2, exactly how should i do this?..(perhaps i should use NSSortDescriptor?)
thanks for the reply
You have presented your structure in the JSON format. I assume it is for sake of presenting it to the audience here. If you are actually starting with JSON string, you will have to convert it to nested NSArrayies and NSDictionaryies using some third-party libs or iOS 5 built-in classes..
Assuming you already have your top level NSArray* myArray, give it a try to the following code:
NSArray* myArray = // ... this is your array
NSArray* sorted_array = [myArray sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {
NSDictionary* left = obj1;
NSDictionary* right = obj2;
NSDictionary* left_parent_dict = [left objectForKey: #"parentdict"];
NSDictionary* right_parent_dict = [right objectForKey: #"parentdict"];
NSArray* left_child_array = [left_parent_dict objectForKey: #"childarray"];
NSArray* right_child_array = [right_parent_dict objectForKey: #"childarray"];
NSDictionary* left_child_first = [left_child_array objectAtIndex: 1];
NSDictionary* right_child_first = [right_child_array objectAtIndex: 1];
NSString* left_close = [left_child_first objectForKey: #"close"];
NSString* right_close = [right_child_first objectForKey: #"close"];
NSNumber* left_val = [NSNumber numberWithInt: [left_close intValue]];
NSNumber* right_val = [NSNumber numberWithInt: [right_close intValue]];
return [left_val compare: right_val];
} ];
You will need, of course, to add some checks which I omitted for simplicity.
If you want to get descending order modify the last statement to:
return [right_val compare: left_val];
I would also suggest you considering SQL database for complex data structures as pointed out by Niko.
Sorting an array can be quite complex, especially when the array contains nested objects. May be you should create an SQLite database
You should use iOS 5.0's built in JSON API. [Here's a link to a great tutorial.] (http://www.raywenderlich.com/5492/working-with-json-in-ios-5). JSON is really easy to work with. And that site also has great tutorials on Core Data (iOS's SQLite API) here. There are two more parts to that tutorial as well.
Try this
[array sortUsingComparator:(NSComparator)^(id obj1, id obj2){
int firstValue = [[obj1 objectForKey:#"someKey"] intValue];
int secondValue = [[obj2 objectForKey:#"someKey"] intValue];
int valueDiff = firstValue - secondValue;
return (valueDiff == 0) ? NSOrderedSame : (valueDiff < 0) ? NSOrderedAscending : NSOrderedDescending;
}];
I have one more big problem while parse the values from Webservice response. I dont know the key for the values in the webservice response. For example,
class = (
{
"ObjectiveC" =
(
{
"brief_desc" = "ObjectiveC";
date = "2008-02-27";
"event_status" = Attended;
},
{
"brief_desc" = "ObjectiveC";
date = "2008-03-05";
"event_status" = Attended;
},
{
"brief_desc" = "ObjectiveC";
date = "2008-03-12";
"event_status" = Missed;
},
);
},
{
"Java" = (
{
"brief_desc" = "Java";
date = "2008-02-27";
"event_status" = Attended;
},
{
"brief_desc" = "Java";
date = "2008-03-05";
"event_status" = Attended;
},
{
"brief_desc" = "Java";
date = "2008-03-12";
"event_status" = Missed;
},
);
}
);
In this response even we dont know the keys "ObjectiveC" and "Java". The keys("ObjectiveC and Java") should be change in every response retured. How to get values of key (Unknown key)? How can i parse this response and get the values?
I would enumerate through the keys to get the value. Here is an example of enumeration in objective-c.
NSEnumerator *enumerator = [myDictionary keyEnumerator];
id key;
while ((key = [enumerator nextObject])) {
//assuming value will be string
NSString *valueForKey = [myDictionary valueForKey:key];
//assuming value is another dictionary
NSDictionary *subDictionary = [myDictionary objectForKey:key];
}
And if you don't know the keys of the sub dictionaries, you can enumerate through those as well.
NSDictionary has - (NSArray *)allKeys and - (NSArray *)allValues. One of those might help
NSDictionary * lessonDict = [[NSDictionary alloc] initWithObjectsAndKeys:#"Key", #"Value", #"Key 2", #"Value 2", nil];
NSArray *values = [lessonDict allValues];
NSArray *keys = [lessonDict allKeys];
NSLog(#"Keys: %#",keys);
NSLog(#"Values: %#",values);
I am using Sudzc (it uses TouchXML) for parsing my web services WSDL, now I am using multiple web services with almost the same WSDL definitions. I edited my code to use this, this is what happens:
CXMLNode* element = [[Soap getNode: [doc rootElement] withName: #"Body"] childAtIndex:0];
output = [Soap deserialize:element];
And the soap deserialize is as following:
// Deserialize an object as a generic object
+ (id) deserialize: (CXMLNode*) element{
return [element stringValue];
}
I get data back ilke this when I log it:
{
RetrieveSetResult = {
Entities = {
RequestData = {
AccountCode = {
IsDirty = false;
IsNothing = true;
NoRights = false;
Value = "<null>";
};
AccountContactEmail = {
IsDirty = false;
IsNothing = true;
NoRights = false;
Value = "<null>";
};
};
};
SessionID = 40;
};
}
How can I use this data in a user friendly way, so i want to be able to say which field I want to select and read.
try access them like a dictionary
NSDictionary *dic = [myXMLparsedObject valueForKey:#"RetrieveSetResult"];
int sesID = [[dic valueForKey:#"SessionID"] intValue];
NSDictionary *entis = [dic valueForKey:#"Entities"];
// … and so on
looping through all elements:
// for iOS prior 4.0
NSArray *dicKeys = [xmlDic allKeys];
for (NSString *key in dicKeys) {
id obj = [xmlDic valueForKey:key];
}
// way simpler in > 4.0
[xmlDic enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
}];
in both cases you can access each key and obj value ;)
Sorry for the long question but that best summarizes what I am trying to do:
My JSON Looks like:
{
4e8cf1d6c7e24c063e000000 = {
"_id" = {
"$id" = 4e8cf1d6c7e24c063e000000;
};
author = faisal;
comments = (
{
author = adias;
comment = amazing;
},
{
author = nike;
comment = "I concur";
}
);
created = {
sec = 1317772800;
usec = 0;
};
text = "This is a random post";
title = "post # 1";
type = (
punjabi
);
};
4e91fd49c7e24cda74000000 = {
"_id" = {
"$id" = 4e91fd49c7e24cda74000000;
};
author = draper;
comments = (
{
author = adias;
comment = "amazing again";
}
);
created = {
sec = 1318118400;
usec = 0;
};
text = "This is a random post again";
title = "post # 2";
type = (
punjabi
);
};
}
What I would like to do is to ultimately have a UTTableview with each row having a title (text from above JSON):
This is the code I have so far:
NSString *responseString = [request responseString];
NSDictionary *resultsDictionary = [responseString objectFromJSONString];
How do I put everything in an array for the UITableView? Again I am just a little rusty as I can swear I have done that before.
If you don't need the keys then you can convert it to an array by using allValues, e.g.:
NSArray *values = [resultsDictionary allValues];
Does your JSON really parse to an NSDictionary, or is this an NSArray containing NSDictionary instances? If the latter, then isn't it just something like:
NSString *textForCell = [[resultsArray objectAtIndex:row] valueForKey:#"title"];
I am trying to read the following json object using the json-framework and obj-C
{
Sections = {
Now = "Wednesday 9 February 2011 02:40";
Section = (
{
Article = (
{
Exceprt = "text here";
ID = 49011;
Title = "text here";
Type = Politics;
audioCounter = 0;
commentsCounter = 0;
hasMore = false;
important = False;
likesCounter = 0;
photoCounter = 0;
time = "21:12";
timeStamp = "2/8/2011 9:14:16 PM";
timeStatus = True;
videoCounter = 0;
viewsCounter = 0;
},
{
Exceprt = "text here";
ID = 49010;
Title = "text here";
Type = Politics;
audioCounter = 0;
commentsCounter = 0;
hasMore = false;
important = True;
likesCounter = 0;
photoCounter = 0;
time = "20:45";
timeStamp = "2/8/2011 9:10:59 PM";
timeStatus = True;
videoCounter = 0;
viewsCounter = 0;
},
{
Exceprt = "text here";
ID = 49008;
Title = "text here";
Type = Politics;
audioCounter = 0;
commentsCounter = 0;
hasMore = false;
important = False;
likesCounter = 0;
photoCounter = 0;
time = "20:28";
timeStamp = "2/8/2011 9:09:44 PM";
timeStatus = True;
videoCounter = 0;
viewsCounter = 0;
}
);
ID = 22;
Name = "EN Live";
totalNews = 3416;
}
);
};
}
My intent is to have a list of the articles (list of dictionaries) so that I can later access them easily. I have been stuck a while on this and my code is giving me an error about calling a non existent method for NSArray which has led me to suspect that I am misunderstanding the json object. I am totally new to this and any help is greatly appreciated.
Here's my code:
NSDictionary *results = [jsonString JSONValue];
NSDictionary *Articles = [[results objectForKey:#"Sections"] objectForKey:#"Section"];
NSArray *ListOfArticles = [Articles objectForKey:#"Article"];
for (NSDictionary *article in ListOfArticles)
{
NSString *title = [article objectForKey:#"Title"];
NSLog(title);
}
Thanks !
First of all, those aren’t valid JSON data. Names (in name/value pairs) are strings and must be quoted. String values must always be quoted. Boolean values must be either true or false (lowercase). Check http://json.org/ and http://www.ietf.org/rfc/rfc4627.txt?number=4627 and http://jsonlint.com
Here’s the structure of your data:
The top level value is an object (dictionary)
This object has a name (key) called Sections whose value is itself another object (dictionary)
Sections has a name (key) called Section whose value is an array
Each element in the Section array is an object (dictionary)
Each element in the Section array has a name (key) called Article whose value is an array, as well as other names (keys): ID, title, totalNews
Each element in the Article array is an object
If your JSON data were valid, you could parse them as follows:
// 1.
NSDictionary *results = [jsonString JSONValue];
// 2.
NSDictionary *sections = [results objectForKey:#"Sections"];
// 3.
NSArray *sectionsArray = [sections objectForKey:#"Section"];
// 4.
for (NSDictionary *section in sectionsArray) {
// 5.
NSLog(#"Section ID = %#", [section objectForKey:#"ID"];
NSLog(#"Section Title = %#", [section objectForKey:#"Title"];
NSArray *articles = [section objectForKey:#"Article"];
// 6.
for (NSDictionary *article in articles) {
NSLog(#"Article ID = %#", [article objectForKey:#"ID"];
NSLog(#"Article Title = %#", [article objectForKey:#"Title"];
// …
}
}
Your JSON framework is probably parsing out an NSDictionary where you're expecting an NSArray. It'll let you assign an NSDictionary to an NSArray, but then you'll get a runtime exception when you attempt to call a method on your "array". Judging by the JSON you posted (which isn't correct JSON), this is what I would have my parsing code look like. The names of the NSDictionaries and NSArrays are simply named after the JSON attributes they represent.
NSDictionary* results = [jsonString JSONValue];
NSDictionary* sections = [results valueForKey:#"Sections"];
NSArray* section = [sections valueForKey:#"Section"];
NSArray article = [[section objectAtIndex:0] valueForKey:#"Article"];
for (NSDictionary* anArticle in article) {
NSLog(#"%#", [anArticle valueForKey:#"Title"]);
}