File with string in JSON format , how to read filecontent into NSDictionary

问题

I have a file-"xyz.txt" in my applicaion bundle with just JSON formatted text. I want to open the filepath of the text file and read the content to NSDictionary. How to do that. I already have my JSON string ready. Just need to initliaze to NSdictionary. If I directly initilize in code , i would need lot of @ before evey key and value. and I want to avoid that. That is the reason , i put JSON in a file-"xyz.txt"

I have two ways - 1.I read form file and assign it using [[NSDictionary alloc] initWithContentsOfFile:filePath]; 2.I assign the string to NSDictionay with lot of @. I want to avoid using @ all the time

I know we can do via NSData id result = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];

but even in that case we will need to initialize string to NSData with @ for all key and value.

Any solution that can read the json from a text file and output assign to a NSDictionary

{
"ABC": [
    {
      "id": "01",
      "score": "0.2"
    },
    {
      "id": "02",
      "score": "0.2"
    }
  ],
  "XYZ": [
    {
      "id": "01",
      "score": "0.9"
    },
    {
      "id": "02",
      "score": "0.9"
    }
   ],
  "PQR": [
    {
      "id": "01",
      "score": "0.9"
    },
    {
      "id": "02",
      "score": "0.3"
    },
    {
      "id": "03",
      "score": "0.2"
    }
   ]
}

回答1:

Get the file's data using NSData's dataWithContentsOfFile method (the file path should be the path to the file in the bundle; there is a method that can get you the path of a resource from the app main bundle).

Then use NSJSONSerialization's JSONObjectWithData method to create a NSDictionary from the JSON data.

回答2:

JSON in string stored in file -> NSDictionary

NSString *filePath = [[NSBundle mainBundle] pathForResource:@"MyDict" ofType:@"text"];
NSData * myDictData = [NSData dataWithContentsOfFile:filePath];
NSError *error;
NSDictionary * myDictionary = [NSJSONSerialization JSONObjectWithData:myDictData
                                                     options:NSJSONReadingMutableContainers
                                                       error:&error];

if (error != nil)
{
    NSLog(@"Error parsing JSON:\n%@",error.userInfo);
    return;
}

来源：https://stackoverflow.com/questions/30557001/file-with-string-in-json-format-how-to-read-filecontent-into-nsdictionary

标签

ios

json

file

nsdictionary