how to add and retrieve data from plist programmatically

hello al开发者_Python百科l I am new to objective c and i want to insert data dynamically/programmatically into plist.please help me.Here is my plist structure

root
  |_Client1
        |_report1
             |_application1
             |_application2

        |_report2
             |_application3

  |_Client2
       |_report1

Now i want to add and retrieve data dynamically to application1,application2 in my plist please help me

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Reading content of .plist file ..

NSString* plistPath = [[NSBundle mainBundle] pathForResource:@"league" ofType:@"plist"];
contentArray = [NSArray arrayWithContentsOfFile:plistPath];

Writing to .plist file.

NSMutableDictionary * myDictionary;
NSString* plistPath = [[NSBundle mainBundle] pathForResource:@"league" ofType:@"plist"];
[myDictionary writeToFile:plistPath atomically:YES];

Note that: Dictionary must contain plist objects (instances of NSData, NSDate, NSNumber, NSString, NSArray, or NSDictionary). And dictionary keys must be NSString objects