简单对象写入文件

//简单对象写入文件
//仅支持NSString,NSArray,NSDictionary,NSData

//获取document路径

// NSString
    NSString * documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
    NSString * path = [documentPath stringByAppendingString:@"/document.txt"];
    NSString * str = @"I LOVE MY IOS TEACHER!";
    [str writeToFile:path atomically:YES encoding:NSUTF8StringEncoding error:nil];
    NSLog(@"%@",path);
 //读取文件
    NSString * content = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
    NSLog(@"%@",content);
    
//NSArray
    NSArray * array = @[@"i",@"love",@"my",@"ios",@"teacher"];
    [array writeToFile:path atomically:YES];
 //读取文件
    NSArray * array2 = [NSArray arrayWithContentsOfFile:path];
    NSLog(@"%@",array2);
    NSArray * array3 = [[NSArray alloc] initWithContentsOfFile:path];
    NSLog(@"%@",array3);
    
//字典
    NSString * cachePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
    NSString * path2 = [cachePath stringByAppendingString:@"/cache.txt"];
    NSDictionary * dic = @{@"name":@"zhang",@"gender":@"f"};
    [dic writeToFile:path2 atomically:YES];
    NSDictionary * dic2 = [NSDictionary dictionaryWithContentsOfFile:path2];
    NSLog(@"%@",dic2);
    
 //NSData
    UIImage * image = [UIImage imageNamed:@"1"];
//    UIImageView * imgView = [[UIImageView alloc] initWithImage:image];
//    [self.view addSubview:imgView];
//    NSLog(@"%@",imgView);
    NSString * tempPath = NSTemporaryDirectory();
    tempPath = [tempPath stringByAppendingString:@"/tmp.txt"];
    //将图片转化成数据对象
    NSData * data = UIImagePNGRepresentation(image);
  //写入文件
    [data writeToFile:tempPath atomically:YES];
    NSLog(@"%@",tempPath);
 //读取文件
    NSData * _data = [NSData dataWithContentsOfFile:tempPath];
    UIImage * _image = [UIImage imageWithData:_data];
    NSLog(@"%@",_image);
    
//    NSUserDefaults * usr = [NSUserDefaults standardUserDefaults];
//    [usr setObject:@"tao" forKey:@"master"];
//    [self test];

//NSFileManager
    NSFileManager * file = [[NSFileManager alloc] init];
    NSFileManager * file1 = [NSFileManager defaultManager];
    NSString * homePath = NSHomeDirectory();
    homePath = [homePath stringByAppendingString:@"/A"];
    [file createDirectoryAtPath:homePath withIntermediateDirectories:YES attributes:nil error:nil];
    
    NSString * homePath2 = [homePath stringByAppendingString:@"/B"];
 //新建文件夹
    [file createDirectoryAtPath:homePath2 withIntermediateDirectories:YES attributes:nil error:nil];
//删除文件夹
    [file removeItemAtPath:homePath2 error:nil];
//拷贝文件夹
//    [file copyItemAtPath:homePath toPath:homePath2 error:nil];//(死循环了)
//移动
    [file moveItemAtPath:homePath2 toPath:homePath error:nil];