oc - NSFileHandle归纳，让对象遵守NSCoding协议，将对象存入数组，再通过解码输出

Person.m

#import "Person.h"

@implementation Person

// 编码

- (id)initWithCoder:(NSCoder *)aDecoder{

    self = [super init];

    if (self) {

        self.name = [[aDecoder decodeObjectForKey:@"name"]copy];// copy不变

        self.age = [aDecoder decodeIntForKey:@"age"];

    }

    return self;

}

// 解码

- (void)encodeWithCoder:(NSCoder *)aCoder{

    [aCoder encodeObject:self.name forKey:@"name"];

    [aCoder encodeInt:self.age forKey:@"age"];

}

@end

main.m

#import <Foundation/Foundation.h>

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

    @autoreleasepool {

        NSString * path = [NSHomeDirectory() stringByAppendingPathComponent:@"desktop/jereh.txt"];

        NSFileManager * manager = [NSFileManager defaultManager];

        if (![manager fileExistsAtPath:path]) {

            [manager createFileAtPath:path contents:nil attributes:nil];

            NSFileHandle * fileHandle = [NSFileHandle fileHandleForWritingAtPath:path];

//            NSString * str = @"dsafas";

//            NSData * data = [str dataUsingEncoding:NSUTF8StringEncoding];

            [fileHandle seekToEndOfFile];

//            [fileHandle writeData:data];

            // 1.将数组写入文件

            NSArray * array = @[@"jack",@"jim"];

            //        [array componentsJoinedByString:@"-"];

            // 自定义归纳

            NSData * data2 = [NSKeyedArchiver archivedDataWithRootObject:array];

            [fileHandle writeData:data2];

            [fileHandle closeFile];

        }else{

//             2.从数组中读出来

            NSFileHandle * readHandle = [NSFileHandle fileHandleForReadingAtPath:path];

            NSData * data = [readHandle availableData];

            NSArray * array = [NSKeyedUnarchiver unarchiveObjectWithData:data];

            for (NSString * tep in array) {

                NSLog(@"%@",tep);

            }

            [readHandle closeFile];

        }

//       归纳

    }

    return 0;

}