Add Additional Keys and Values Within PropertyList Using iOS - ios

Question

I need to add below mentioned keys and values (Image Red Marked Values) Into propertylist.
Needed Structure (need to add Red marked keys and values at same position)
Now my plist:
My Exact Scenario Below
I have created plist and Into the plist I am getting the storage
data from JSON parser.
I have one standard mediatory storage structure based on that Its
storing (I have added above Image two)
Now I need to add two boolean keys and values by
manual, Into the plist. Where and which position all the information
I have marked and mentioned by above Image one.
JSON parse to store data Into plist for that I have used below code
Below code I am using:
NSDictionary *JSON = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves | NSJSONReadingMutableContainers error:&error];
NSDictionary *response = JSON[#"response"];
NSArray *keys = [response allKeys];
NSMutableArray *objects = [NSMutableArray new];
for (NSString *key in keys) {
NSMutableDictionary *object = response[key];
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"subject = %#",object[#"subject"]];
NSArray *objectsWithSameSubject = [objects filteredArrayUsingPredicate:predicate];
NSInteger subjects = [object[#"subject"] integerValue];
if (subjects > 0) {
NSMutableArray *Objects_Subjectcount = [NSMutableArray new];
[object setObject:Objects_Subjectcount forKey:#"Objects_Subjectcount"];
for (NSInteger i = 0; i < subjects; i++) {
[Objects_Subjectcount addObject:object];// object or anything you need
}
}
[objects addObject:object];
}
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = paths.firstObject;
NSString *plistPath = [documentsPath stringByAppendingPathComponent:#"File.plist"];
NSError *writeError = nil;
NSDictionary *finalDict = #{#"Objects": objects};
NSData *plistData = [NSPropertyListSerialization dataWithPropertyList:finalDict format:NSPropertyListXMLFormat_v1_0 options:NSPropertyListImmutable error:&writeError];
if(plistData){
[plistData writeToFile:plistPath atomically:YES];
}
else {
NSLog(#"Error in saveData: %#", error);
}

Answer 1

Assume your existing plist is created by this code:
NSDictionary *dic = #{#"Planet":#"Earth",
#"Earth":#{#"1":#"Asia",
#"2":#"Africa"}
};
[dic writeToFile:path atomically:YES];
Then you need to insert a new key-value pair inside Earth.
//read
NSDictionary *readDict = [NSDictionary dictionaryWithContentsOfFile:path];
//create a mutable dict to edit it
NSMutableDictionary *mDict = [readDict mutableCopy];
//read the key-value for earth, and we are gonna edit it
NSMutableDictionary *earthDict = mDict[#"Earth"];
//set new object, it can be anything, string, array, dictionary etc
[earthDict setObject:#{#"myName":#"Anoop"}
forKey:#"new"];
//write it back to same file
[mDict writeToFile:path atomically:YES];
Now the plist looks like this: