IOS之数据持久化 (简单对象写入文件)

- (IBAction)wirteBT:(id)sender {
//获取字符串
NSString *str1 = _ONRTF.text;
NSString *str2 = _TWOTF.text;

//获取documents文件路径
NSString *documentsPath  = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)firstObject];

#pragma mark -- NSString(字符串)写入本地
//    //拼接文件路径
//    //PathComponent 文件前不用加"/"
//    NSString *filePath = [documentsPath stringByAppendingPathComponent:@"test.TXT"];
//    //写入
//    [str1 writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:nil];

#pragma mark -- 数组写入本地
//    //数组
//    NSArray *arr = @[str1,str2];
//    //拼接
//    NSString *filePath = [documentsPath stringByAppendingPathComponent:@"arr.plist"];
//    //写入
//    [arr writeToFile:filePath atomically:YES];

#pragma mark -- 字典写入本地
//    //字典
//    NSDictionary *dic = @{@"one":_ONRTF.text,@"two":_TWOTF.text};
//    //文件拼接
//    NSString *firlPath = [documentsPath stringByAppendingPathComponent:@"dic.plist"];
//    //写入
//    [dic writeToFile:firlPath atomically:YES];

#pragma mark -- data写入本地
//data
NSData *data = [str1 dataUsingEncoding:NSUTF8StringEncoding];
//文件拼接
NSString *filePath = [documentsPath stringByAppendingPathComponent:@"data.data"];
//写入
[data writeToFile:filePath atomically:YES];
}

- (IBAction)readBT:(id)sender {
//获取文件路径
//获取documents文件路径
NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)firstObject];

#pragma mark -- 字符串读取
//    //拼接文件路径
//    NSString *filePath = [documentsPath stringByAppendingPathComponent:@"test.TXT"];
//    //展示
//    self.TWOTF.text = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];

#pragma mark -- 数组读取
//    //文件路径拼接
//    NSString *filePath = [documentsPath stringByAppendingPathComponent:@"arr.plist"];
//    //读取
//    NSArray *arr = [NSArray arrayWithContentsOfFile:filePath];
//   //展示
//    self.ONRTF.text = arr[0];
//    self.TWOTF.text = arr[1];

#pragma mark -- 字典读取
//    //路径
//    NSString *filePath = [documentsPath stringByAppendingPathComponent:@"dic.plist"];
//    //读取
//    NSDictionary *dic = [NSDictionary dictionaryWithContentsOfFile:filePath];
//    //展示
//    self.ONRTF.text = [dic valueForKey:@"one"];
//    self.TWOTF.text = [dic valueForKey:@"two"];

#pragma mark -- data读取
NSString *filePath = [documentsPath stringByAppendingPathComponent:@"data.data"];
NSData *data = [NSData dataWithContentsOfFile:filePath];
//展示
NSString *str = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
self.TWOTF.text = str;

//self.ONRTF.text = [data ];
//   NSLog(@"%@",data);
}

//创建
- (IBAction)creatBT:(id)sender {
//获取documents 文件路径
NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)firstObject];
//拼接文件夹路径
NSString *filePath = [documentPath stringByAppendingPathComponent:@"Images"];
//创建文件管理对象
NSFileManager *manager =  [NSFileManager defaultManager];
//创建
[manager createDirectoryAtPath:filePath withIntermediateDirectories:YES attributes:nil error:nil];

}

- (IBAction)moveBT:(id)sender {
//将Images 移动到Caches中

//oldPath
//获取tmp文件路径
NSString *tempPath = NSTemporaryDirectory();
//拼接
NSString *oldPath = [tempPath stringByAppendingPathComponent:@"Images"];
//newPath
//获取Caches文件路径
NSString *cachesPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)firstObject];
//拼接
NSString *newPath = [cachesPath stringByAppendingPathComponent:@"Images"];
//创建文件管理对象
NSFileManager *manager = [NSFileManager defaultManager];

//移动
[manager moveItemAtPath:oldPath toPath:newPath error:nil];

}

- (IBAction)copyBT:(id)sender {
//复制到tmp

//1; 获取tmp文件路径
NSString *tmp = NSTemporaryDirectory();
//2: 文件拼接
NSString *newPath = [tmp stringByAppendingPathComponent:@"Images"];
//获取documents文件路径
NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)firstObject];
//文件拼接
NSString *oldPath = [documentsPath stringByAppendingPathComponent:@"Images"];

//创建文件管理对象
NSFileManager *manager = [NSFileManager defaultManager];
//复制
[manager copyItemAtPath:oldPath toPath:newPath error:nil];

}

- (IBAction)removeBT:(id)sender {
//获取Caches文件路径
NSString *cachesPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)firstObject];
//拼接
NSString *filePath = [cachesPath stringByAppendingPathComponent:@"Images"];
//创建文件管理对象
NSFileManager *manager = [NSFileManager defaultManager];

[manager removeItemAtPath:filePath error:nil];
}

- (IBAction)exeitAction:(id)sender {
//获取Caches文件路径
NSString *cachesPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)firstObject];
//拼接
NSString *filePath = [cachesPath stringByAppendingPathComponent:@"Images"];
//创建文件管理对象
NSFileManager *mananger = [NSFileManager defaultManager];
//判断是否存在
BOOL isExist = [mananger fileExistsAtPath:filePath];
UIAlertView *alerview = [[UIAlertView alloc]initWithTitle:@"提示" message:nil delegate:nil cancelButtonTitle:nil otherButtonTitles:@"确定", nil];
if (isExist) {
alerview.message = @"文件存在";

}else
{
alerview.message = @"文件不存在";
}
[alerview show];
}