将NSDictionary对象转换为NSData对象，反之亦然

问题描述

我必须将 NSDictionary 对象转换为 NSData ，而且我必须得到相同的 NSDictionary 超出 NSData 对象。我该怎么办呢？

I have to convert an NSDictionary object into NSData and further I have to get the same NSDictionary out of the NSData object. How should I go about it?

推荐答案

使用NSKeyedArchiver

use NSKeyedArchiver

到将NSDictionary转换为NSData

To convert NSDictionary To NSData

NSMutableData *data = [[NSMutableData alloc]init];
NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc]initForWritingWithMutableData:data];
[archiver encodeObject:YOURDICTIONARY forKey: YOURDATAKEY];
archiver finishEncoding];
[data writeToFile:YOURFILEPATH atomically:YES];
[data release];
[archiver release];

从存储的NSData中获取NSDictionary

To get the NSDictionary back from the stored NSData

NSData *data = [[NSMutableData alloc]initWithContentsOfFile:YOURFILEPATH];
NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
YOURDICTIONARY = [unarchiver decodeObjectForKey: YOURDATAKEY];
[unarchiver finishDecoding];
[unarchiver release];
[data release];

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