如何在iPhone中以编程方式在plist文件中添加多个数组

I want to create plist file with multiple array and array as Root type.I can add multiple array in dictionary but I want to add all array in one array programmatically.How is it possible to create plist file programmatically and write array data into it.Please guide me and give some sample links.Thanks. Here is my code to add array in dictionary :I want to create plist file with multiple array