How to parse NSJsonDictionary objects in json file using SBJson4StreamParser

I'm new to iOS, I was able to write the NSDictionary objects into file like below example

{
"msg":"Hello",
"from":"X",
"date":"12/1/2014"
}
{
"msg":"new to IOS",
"from":"home",
"date":"23/2/2014"
}

I know it is an array of objects I need to be using NSArray, but I have prevented since my one NSDictionary object consumes lot of memory, I wanted to serialise and deserialize one object at a time. I came across SBJson4StreamParser internally does such functionality, but I was facing issues with implementation, I also tried with native NSJsonSeriailzation but options were limited for such type of parsing, can anyone help with this.

SBJson can help here, by reading the file chunkwise with an NSInputStream and feeding it into the parser like this:

id parser = [SBJson4Parser multiRootParserWithBlock:block
                                       errorHandler:eh];

id is = [NSInputStream inputStreamWithFileAtPath:filePath];
[is open];

// Buffer to read from the input stream
uint8_t buf[1024];

// Read from input stream until empty, or an error;
// better error handling is left as an exercise for the reader
while (0 > [is read:buffer maxLength: sizeof buffer]) {
    SBJson4ParserStatus status = [parser parse:data];
    NSLog(@"Status: %u",status);
    // Handle parser errors here
}
[is close];

Note that you still have to read and parse the whole file to guarantee that you find a particular entry. There is no way to process just a specific entry this way.