IOS growth path-Get values from other classes in the appdelegate class

Define attributes in the appdelegate class

For example, a textdb object assigns the value to this object in other classes to use this object in the appdelegate class.

@ Class textdb; @ interface appdelegate: uiresponder <uiapplicationdelegate> {textdb * itextdb ;}

Then, in the class you want to obtain the value, write as follows:

// Define the object APD of the appdelegate class // use the following method to use this object so that the value can be uploaded to self in appdelegate. APD = (appdelegate *) [[uiapplication sharedapplication] Delegate]; // assign the textdb object in this class to the textdb object self in the appdelegate class. APD. itextdb = self. itextdb;

You can get the value of the textdb object in the appdelegate class through the two steps above.