Black Horse programmer ___ OC _ ARCHIVE

 

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;}

 

黑马程序员___OC__归档