Nsuserdefaults reading and writing custom objects

Nsuserdefaults can access a few short messages.

For example, deposit and then read out a string to Nsuserdefaults:

Write Local
[[Nsuserdefaults Standarduserdefaults] setobject:@ "hahaha" forkey:@ "MyKey"];
Get the value of this key
NSString *value = [[Nsuserdefaults standarduserdefaults] Objectforkey: "MyKey"];
Clears the value of this key locally
[[Nsuserdefaults Standarduserdefaults] Setobject:nil forkey:@ "MyKey"];

But not all things can be put in. Nsuserdefaults only supports: NSString, NSNumber, NSDate, Nsarray, Nsdictionary.

Nsuserdefaults reading and writing custom objects