Add json file and print in console - ios

Question

I know how to create a dummy json data and to print them in console like below code:
NSArray *jsonObject;
jsonObject = #[#{#"Id1":#"mad",
#"people1":#"300"},
#{#"Id2":#"normal",
#"people2":#"9",#"total2":#"300"}];
NSError *err;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:jsonObject options:NSJSONWritingPrettyPrinted error:nil];
NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData:jsonData options: NSJSONReadingMutableContainers error: &err];
NSLog(#"%#,%#",jsonArray);
I have one file name Areafiles.JSON. In that file I have some json data. I directly drag and drop in my project.
How can I read and print in my console like my above example?

Answer 1

For Swift:
Suppose you have a Json file titled a.json in your project that looks something like this:
{
"person":[
{
"name": "Bob",
"age": "16",
"employed": "No"
},
{
"name": "Vinny",
"age": "56",
"employed": "Yes"
}
]
}
Now just follow the three simple steps:
Read the file
Convert the contents of the file into an NSData
Convert the NSData into JSON object
Now you are free to use the Json object as you please:
// Get the path to the JSON File
if let path = NSBundle.mainBundle().pathForResource("a", ofType: "json")
{
// Load the contents of the file into an NSData object
if let jsonData = NSData(contentsOfFile: path)
{
do {
// Serialize the jsonData object to make a Json object
let jsonResult = try NSJSONSerialization.JSONObjectWithData(jsonData, options: NSJSONReadingOptions.AllowFragments)
if let persons : NSArray = jsonResult["person"] as? NSArray
{
// Print the contents of your file
print(persons)
}
} catch {
print("Problem converting jsonResult to dictionary")
}
}
}
Its the same process in both Swift and Objective-C.

Answer 2

Once you drag & drop a file in your project, the file goes in your application bundle. So you need to get the path of the file on the application bundle.
NSString* path = [[NSBundle mainBundle] pathForResource:#"Areafiles" ofType:#"json"];
Now you are ready to load its content on a string
NSString* content = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
Then you want to obtain a dictionary from that string
NSArray *json = [NSJSONSerialization JSONObjectWithData:[content dataUsingEncoding:NSUTF8StringEncoding] options: NSJSONReadingMutableContainers error:&error];

Answer 3

File -> NSData
// get path to the file
NSString *path = [[NSBundle mainBundle]pathForResource:#"Areafiles"
ofType:#"json"];
// NSData from the filepath
NSData *fileData = [NSData dataWithContentsOfFile:path];
NSData -> NSDictionary
NSError* error;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:fileData
options:kNilOptions
error:&error];
if (error == nil) {
NSLog(#"%#", jsonDict);
return jsonDict;
}
else {
NSLog(#"Error reading JSON file");
return nil;
}