黑马程序员___OC__归档

将数据以一定的格式写到文件，等到需要用的时候直接按照原来的形式读出来，这种方式叫做归档

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        
        
        
        NSDictionary *dict =[[NSDictionary alloc] initWithObjectsAndKeys:@"one",@"1",@"two",@"2",@"three",@"3", nil];
        
        //将字典写到文件夹里面
        [dict writeToFile:@"/Users/fengze/Desktop/test1" atomically:YES];
        
        
        //将文件读出来，直接生成一个字典
//         NSDictionary dict2 = [[NSDictionary alloc] initWithContentsOfFile:@"/Users/fengze/Desktop/test1"];
   
        NSArray *array = [[NSArray alloc] initWithObjects:@"one",@"two",@"three", nil];
        
        NSMutableData *data = [[NSMutableData alloc] init];
        
        //当字典和数组想同时写入一个文件的时候
        
        //创建一个归档管理员
        NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
        
        //将数据打包
        [archiver encodeObject:array forKey:@"array"];
        [archiver encodeObject:dict forKey:@"dict"];
        //完成打包
        [archiver finishEncoding];
        [data writeToFile:@"/Users/fengze/Desktop/test1" atomically:YES];
        
        //反归档管理员
        NSKeyedUnarchiver *unrchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
        
        //将打包的数组读出来
        NSArray *array2 = [unrchiver decodeObjectForKey:@"array"];
        //将打包的字典读出来
        NSDictionary *dict2 = [unrchiver decodeObjectForKey:@"dict"];
    
    }
    return 0;
}