Set method in KVO/KVC

1. Use Setvalue:forkey: To set the name of the student object

[student setvalue:@ "one" forkey:@ "name"];

 

 

      Use Setvalue:forkey: Set age for Student objects

[student Setvalue:[nsnumber Numberwithint:17] forkey:@ "Age"];

  When you set a scalar value, you need to wrap the scalar value into a nsnumber or Nsvalue object first

 

 

        2. KVC can make bulk changes to objects           For example, get student's age and name

Nsarray *keys = [Nsarray arraywithobjects:@] Name ", @" age ", nil];

Nsdictionary *dict = [student Dictionarywithvaluesforkeys:keys];

 

    3.   Set student's age and name

Nsarray *keys = [nsarray arraywithobjects:@ ' name ', @ ' age ', nil];

Nsarray *values = [Nsarray arraywithobjects:@ "One", [NSNumber numberwithint:16], nil];

Nsdictionary *dict = [nsdictionary dictionarywithobjects:values Forkeys:keys];

[student setvaluesforkeyswithdictionary:dict];

Set method in KVO/KVC