OC's "nsmutabledictionary use"

MAIN.M file

#import <Foundation/Foundation.h>

#import "Student.h"

#pragma the use of the mark variable dictionary

void Dictuse () {

Create an empty Dictionary

Nsmutabledictionary *dict = [Nsmutabledictionarydictionary];

Student *STU1 = [studentstudentwithname:@ "STU1"];

Student *stu2= [studentstudentwithname:@ "STU2"];

adding elements

The STU1 counter will be +1

[Dictsetobject:stu1 forkey:@ "K1"];

NSLog (@ "Stu1:%zi", [Stu1retaincount]);

Add other dictionaries to the current dictionary Dict

Nsdictionary *other = [nsdictionarydictionarywithobject:@ "v2" forkey:@ "K2"];

[Dict Addentriesfromdictionary:other];

Remove all key-value pairs

[Dict removeallobjects];

Delete K1 corresponding element stu1,stu1 will do a release operation once

[Dict removeobjectforkey:@ "K1"];

NSLog (@ "Stu1:%zi", [Stu1retaincount]);

Delete multiple keys corresponding to value

[Dict removeobjectsforkeys:[nsarray arraywithobject:@ "K1"];

When the dictionary is destroyed, all internal key and value counters will be-1, which means STU1 will release once

}

int main (int argc,const char * argv[])

{

@autoreleasepool {

Dictuse ();

}

return 0;

}

OC's "nsmutabledictionary use"