Syntax
- (id)JSONObjectWithData:(NSData *)data options:(NSJSONReadingOptions)opt error:(NSError * _Nullable *)error
Parameters
| Operator | Description |
|---|---|
| data | A data object containing JSON data |
| opt | Options for reading the JSON data and creating the Foundation objects. |
| error | If an error occurs, upon return contains an NSError object that describes the problem. |
Remarks
NSJSONSerialization is Available in iOS 5.0 and later An object that may be converted to JSON must have the following properties:
-
The top level object is an NSArray or NSDictionary.
-
All objects are instances of NSString, NSNumber, NSArray, NSDictionary, or NSNull.
-
All dictionary keys are instances of NSString.
-
Numbers are not NaN or infinity.
JSON Parsing using NSJSONSerialization Objective c
NSError *e = nil;
NSString *jsonString = @"[{\"id\": \"1\", \"name\":\"sam\"}]";
NSData *data = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData: data options: NSJSONReadingMutableContainers error: &e];
if (!jsonArray) {
NSLog(@"Error parsing JSON: %@", e);
} else {
for(NSDictionary *item in jsonArray) {
NSLog(@"Item: %@", item);
}
}
Output:
Item: {
id = 1;
name = sam;
}
Example 2:Using contents of url:
//Parsing:
NSData *data = [NSData dataWithContentsOfURL:@“URL HERE”];
NSError *error;
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSLog(@“json :%@”,json);
Sample response:
json: {
MESSAGE = “Test Message";
RESPONSE =(
{
email = "[email protected]";
id = 15;
phone = 1234567890;
name = Staffy;
}
);
STATUS = SUCCESS;
}
NSMutableDictionary *response = [[[json valueForKey:@"RESPONSE"] objectAtIndex:0]mutableCopy];
NSString *nameStr = [response valueForKey:@"name"];
NSString *emailIdStr = [response valueForKey:@"email"];
