文件数据存储查看

1.文件内容查看

-(void)loadFile{
    NSString *filePath=@"/Users/qing/Library/haha.txt";
    if([[NSFileManager defaultManager] fileExistsAtPath:filePath]){
        NSData *data=[[NSMutableData alloc]initWithContentsOfFile:filePath];
        NSString * str=[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"content=%@",str);
    }else{
        NSLog(@"NO");
    }
}

 2.文件存档

NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];

[archiver encodeObject:fourLines forKey:kDataKey];

[archiver finishEncoding];

[data writeToFile:[self dataFilePath] atomically:YES];

3.获取XML文件

NSString *filePath = [[NSBundle mainBundle] pathForResouse:@"re" ofType:@"xml"];
NSData *data = [[NSData alloc] initWithContentsOfFile:filePath];

 

获取属性列表 

NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"ViewControllers" ofType:@"plist"]];

 

4.用户首选项NSuserDefaults

 NSUserDefaults *Defaults=
    [NSUserDefaults standardUserDefaults];
    
    [Defaults setObject:@"helloc ddddyou22" forKey:@"hello"];
  //会有缓存数据，要clean
   NSLog(@"%@",[Defaults objectForKey:@"hello"]);