NSKeyedArchiver对象归档
首先要实现<NScoding>里面的两个代理方法initWithCoder,encodeWithCoder
@property (nonatomic, copy) NSString *keyName;
/*将某个对象写入文件时候会调用在这个方法中说清楚哪些属性需要存储*/
- (void)encodeWithCoder:(NSCoder *)encoder{[encoder encodeObject:self.keyName forKey:@"KeyName"];
}
/*解析对象会调用这个方法需要解析哪些属性*/
- (id)initWithCoder:(NSCoder *)decoder{if (self = [super init]) {self.name = [decoder decodeObjectForKey:@"KeyName"];}return self;
}//宏定义一个数据存储路径
#define MyDataFilePath [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"myApp.data"]@property (nonatomic, strong) NSMutableArray *myAppArr;
//从归档提取数据
_myAppArr = [NSKeyedUnarchiver unarchiveObjectWithFile:MyDataFilePath];//将数据归档保存
[NSKeyedArchiver archiveRootObject:self.myAppArr toFile:MyDataFilePath];
