I'm struck how to enumerate JSON by remove first object in iOS programming as below
From
[{"001": {"name":"test", "url":"test"},"002":{"name":"test1", "url":"test1"},"003":{"name":"test2", "url":"test2"}}]
to
[ {"name":"test", "url":"test"},{"name":"test1", "url":"test1"},{"name":"test2", "url":"test2"}]
Pls help to recommend me or suggestion coding.
Thank you.
Try this,
NSArray *jsonArray = //parsedJsonArray
NSDictionary *values = [jsonArray objectAtIndex:0];
NSArray *valuesArray = [values allValues];
And the valuesArray will contain the data in format,
[ {"name":"test", "url":"test"},
{"name":"test1", "url":"test1"}, {"name":"test2", "url":"test2"}]
You can easily convert a json string to a NSMutableArray :
NSError *error;
// Get a NSMutableArray from the json string
NSData *data = [yourJsonString dataUsingEncoding:NSUTF8StringEncoding];
NSMutableArray *arrayResult = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];
// Remove the first object
[arrayResult removeObject:[arrayResult firstObject]];
jsonDataArray1=[[NSMutableArray alloc]initWithArray:[JSON objectForKey:#"001"]];
jsonDataArray2=[[NSMutableArray alloc]initWithArray:[JSON objectForKey:#"002"]];
jsonDataArray3=[[NSMutableArray alloc]initWithArray:[JSON objectForKey:#"003"]];
jsonDataArrayFinal=[[NSMutableArray alloc]initWithObjects:jsonDataArray1,jsonDataArray2,jsonDataArray3 nil];
initialize all above arrays in viedidload
Related
Can anybody help me create an NSDictionary format of the following structure:
{
key1 = "value1";
key2 = "value2";
key3 = [
{
key01 = "value01";
key02 = "value02";
},
{
key01 = "value01";
key02 = "value02";
},
{
key01 = "value01";
key02 = "value02";
}
];
}
Try this code it might help you.
NSDictionary *dicationary = #{
#"key1":#"value1",
#"key2":#"value2",
#"key3":#[#{#"key01":#"value01",#"key02":#"value02"},
#{#"key01":#"value01",#"key02":#"value02"},
#{#"key01":#"value01",#"key02":#"value02"}]
};
There is API in obj-c to convert Json to nsdictionary .I guess you should try that :
First convert json to nsdata (assuming you above JSON is in string format)
2.Then you API to convert that to NSDictionary :
NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
Just to answer your question about converting that JSON data to NSDictionary, here it is:
(assuming you already got your JSON data)
// add the first 2 VALUES with it's KEYS
NSMutableDictionary *mainDict = [NSMutableDictionary dictionary];
[mainDict setValue:VALUE1 forKey:KEY1];
[mainDict setValue:VALUE2 forKey:KEY2];
// then for the last KEY, create a mutable array where you will store your sub dictionaries
NSMutableArray *ma = [NSMutableArray array];
NSMutableDictionary *subDict = [NSMutableDictionary dictionary];
[subDict setValue:SUB_VALUE1 forKey:SUB_KEY1];
[subDict setValue:SUB_VALUE1 forKey:SUB_KEY2];
[ma addObject:subDict];
// then add that array to your main dictionary
[mainDict setValue:ma forKey:KEY3];
// check the output
NSLog(#"mainDict : %#", mainDict);
// SAMPLE DATA - Test this if this is what you want
NSMutableDictionary *mainDict = [NSMutableDictionary dictionary];
[mainDict setValue:#"value1" forKey:#"key1"];
[mainDict setValue:#"value2" forKey:#"key2"];
NSMutableArray *ma = [NSMutableArray array];
NSMutableDictionary *subDict = [NSMutableDictionary dictionary];
[subDict setValue:#"subValue1" forKey:#"subKey1"];
[subDict setValue:#"subValue2" forKey:#"subKey2"];
[ma addObject:subDict];
[mainDict setValue:ma forKey:#"key3"];
NSLog(#"mainDict : %#", mainDict);
The following should work for you:
NSString *jsonString = #"{\"ID\":{\"Content\":268,\"type\":\"text\"}}";
NSData *data = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
NSLog(#"%#", jsonDict[#"ID"][#"Content"]);
Will return you:
268
I get this JSON object from my web service
0: {
Username: "John"
Password: "12345"
Position: "Admin"
Job: "Developer"
ResourceJobId: 1
}
When I try to assign a value, for example, to Username JSON string, I get a semantic error:
id obj = [NSJSONSerialization JSONObjectWithData:data
options:NSJSONReadingAllowFragments
error:&error];
for (NSDictionary *dictionary in array) {
NSString *usernameString = #"";
//this line of code gives me an error: Expression is not assignable
[dictionary objectForKey:#"Username"] = usernameString ;
I know how get the JSON object with NSJSONSerialization class, but my target is how assign the value #"" to the JSON object.
So how can I assign the value #"" to the Username JSON string?
While you are trying to fetched dictionary from array. it is not mutable dictionary so you need to created NSMutableDictionary while fetching data from Array. following code will help you to change username.
for (NSMutableDictionary *dictionary in array)
{
NSMutableDictionary* dictTemp = [NSMutableDictionary dictionaryWithDictionary:dictionary];
[dictTemp setObject:usernameString forKey#"Username"];
[_arrayList replaceObjectAtIndex:index withObject:dictTemp];
}
Well your assignment operation is written wrong, it should be indeed like this:
If you need to get value from dictionary
usernameString = [dictionary objectForKey:#"Username"];
If you want to set a value to your dictionary, first of all your dictionary should be NSMutableDictionary
[dictionary setObject:usernameString forKey:#"Username"];
NSData *data = [NSData dataWithContentsOfURL:url];
NSError *error;
id obj = [NSJSONSerialization JSONObjectWithData:data
options:NSJSONReadingAllowFragments
error:&error];
if(!error && [obj isKindOfClass:[NSArray class]]){
NSArray *array = (NSArray *)obj;
Booking *booking = nil;
for (NSMutableDictionary *dictionary in array) {
NSString *usernameString = #"";
//this line of code gives me an error: Expression is not assignable
[dictionary objectForKey:#"Username"] = usernameString;
Yes, is a compiler error
You need to have a mutabledictionary inorder to change the value. Try this
for (NSDictionary *dictionary in array) {
NSMutableDictionary *mutableDictionary = [NSMutableDictionary dictionaryWithDictionary:dictionary];
NSString *usernameString = #"";
[mutableDictionary setValue:#"" forKey:usernameString];
}
Even the answers are correct, I want to add that you do not have to do this your own. NSJSONSerialization already has a solution for that. Simply pass as options one of these:
NSJSONReadingMutableContainers = (1UL << 0),
NSJSONReadingMutableLeaves = (1UL << 1),
when reading the JSON.
I have an array which is of below kind.
{"Hotweeks":[{"Image":"http://www.example.com/wp-content/uploads/0970E01L.jpg","Description":"Ocean Shores, WA","PostTitle":"Windjammer Condominiums"},
{"Image":"","Description":"","PostTitle":"0970O01L"},
{"Image":"","Description":"","PostTitle":"0970I08L"},
{"Image":"","Description":"","PostTitle":"0970I06L"},
{"Image":"","Description":"","PostTitle":"0970I04L"},
{"Image":"","Description":"","PostTitle":"0970i03L"},
{"Image":"","Description":"","PostTitle":"0970I02L"},
{"Image":"","Description":"","PostTitle":"0970I01L"},
{"Image":"","Description":"","PostTitle":"0970E02L"},
{"Image":"","Description":"","PostTitle":"0970E01L"},
{"Image":"http://www.example.com/wp-content/uploads/0936E01L.jpg","Description":"Manson, WA","PostTitle":"Wapato Point"},
{"Image":"","Description":"","PostTitle":"0936O05L"},
{"Image":"","Description":"","PostTitle":"0936O04L"},
{"Image":"","Description":"","PostTitle":"0936O03L"},
{"Image":"","Description":"","PostTitle":"0936O02L"},
{"Image":"","Description":"","PostTitle":"0936O01L"},
{"Image":"","Description":"","PostTitle":"0936I01L"},
{"Image":"","Description":"","PostTitle":"0936E03L"},
{"Image":"","Description":"","PostTitle":"0936E02L"},
{"Image":"","Description":"","PostTitle":"0936E01L"}]}
Which I am trying to parse using the below code.
NSArray *array = [NSJSONSerialization JSONObjectWithData:[returnString dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingMutableContainers error:&error];
NSLog(#"Size of array is %ld",[array count]);
NSDictionary *dictionary = [array objectAtIndex:0];
NSString *test = [dictionary objectForKey:#"Image"];
NSLog(#"Value for image is %#",test);
This is returning null in Nslog.
…"Description":"Ocean Shores, WA,"PostTitle":…
is missing a " after Ocean Shores, WA. It should be
…"Description":"Ocean Shores, WA","PostTitle":…
Use a JSON validator to check for this type of thing. There are many to pick from. I use the Chrome apps JSON Lint and JSON Editor.
The top level of your Json file is an object, not an array (it doesn't start with '['). That being said, if you check array's type like this: NSLog("%#", [array class] you'll probably see it's a NSDictionary.
To get the array you can do this:
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:[returnString dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingMutableContainers error:&error];
NSArray *array = jsonDict[#"Hotweeks"];
NSLog(#"Size of array is %ld",[array count]);
NSDictionary *dictionary = [array objectAtIndex:0];
NSString *test = [dictionary objectForKey:#"Image"];
NSLog(#"Value for image is %#",test);
I'm newbie in developing Xcode 5 and unable to connect to SQLServer via php.
The php result is this:
{"user":[{"user_id":"2393", "id":"740049"}], "succeed":1}
This webservice created not by me but my team. I tried to track the process via NSLog and found the problem is NSDictionary i created unable to read this kind of format.
This is my NSDictionary
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:urlData option:NSJONReadingMutableContainers error:&error];
success=[json[#"success"] integerValue];
NSLog(#"Success:%ld", (long)success);
if my NSDictionary were able to read the data then the success should be 1 but it keep showing 0. I find the problem is that i cant parse that array in dictionary. Could anyone help me fix this thing?
You mistype the key value. it will be #"succeed". But you type #"success"
NSJSONSerialization *jsonData = [NSJSONSerialization JSONObjectWithData: urlData options:NSJSONReadingMutableContainers error:&error];
int success=[[(NSDictionary *)jsonData valueForKey:#"succeed"]integerValue];
NSLog(#"Success:%ld", (long)success);
Typo:
success=[json[#"succeed"] integerValue];
// ^^^^^^^
//returnString is {"user":[{"user_id":"2393", "id":"740049"}], "succeed":1};
NSDictionary *response = [returnString dataUsingEncoding:NSUTF8StringEncoding];
NSArray *users =[NSArray alloc]init];
if([[response valueForKey:#"succeed"] integerValue] == 1)
users = [response valueForKey:#"user"];
for(NSDictionary *user in users)
NSLog(#"User : %#", user);
Sample Output
User: [{user_id:2393,id:740049},{user_id:2394,id:740050}...,{user_id:2395,id:740051}];
I created a web service which returns JSON or so I think. The data returned look like this:
{"invoice":{"id":44,"number":42,"amount":1139.99,"checkoutStarted":true,"checkoutCompleted":true}}
To me, that looks like valid JSON.
Using native JSON serializer in iOS5, I take the data and capture it as a NSDictionary.
NSError *error;
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:[request responseData] options:kNilOptions error:&error];
NSLog(#"json count: %i, key: %#, value: %#", [json count], [json allKeys], [json allValues]);
The output of the log is:
json count: 1, key: (
invoice
), value: (
{
amount = "1139.99";
checkoutCompleted = 1;
checkoutStarted = 1;
id = 44;
number = 42;
}
)
So, it looks to me that the JSON data has a NSString key "invoice" and its value is NSArray ({amount = ..., check...})
So, I convert the values to NSArray:
NSArray *latestInvoice = [json objectForKey:#"invoice"];
But, when stepping through, it says that latestInvoice is not a CFArray. if I print out the values inside the array:
for (id data in latestInvoice) {
NSLog(#"data is %#", data);
}
The result is:
data is id
data is checkoutStarted
data is ..
I don't understand why it only return the "id" instead of "id = 44". If I set the JSON data to NSDictionary, I know the key is NSString but what is the value? Is it NSArray or something else?
This is the tutorial that I read:
http://www.raywenderlich.com/5492/working-with-json-in-ios-5
Edit: From the answer, it seems like the "value" of the NSDictionary *json is another NSDictionary. I assume it was NSArray or NSString which is wrong. In other words, [K,V] for NSDictionary *json = [#"invoice", NSDictionary]
The problem is this:
NSArray *latestInvoice = [json objectForKey:#"invoice"];
In actual fact, it should be:
NSDictionary *latestInvoice = [json objectForKey:#"invoice"];
...because what you have is a dictionary, not an array.
Wow, native JSON parser, didn't even notice it was introduced.
NSArray *latestInvoice = [json objectForKey:#"invoice"];
This is actually a NSDictionary, not a NSArray. Arrays wont have keys. You seem capable from here.
Here I think You have to take to nsdictionary like this
NSData* data = [NSData dataWithContentsOfURL: jsonURL];
NSDictionary *office = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
NSDictionary *invoice = [office objectForKey:#"invoice"];