iOS隔離儲存區 (Isolated Storage)Demo（調試過可以運行）

    NSArray *array1 = [NSArray arrayWithObjects:@"iphone",@"ipod",nil];    NSArray *array2 = [NSArray arrayWithObjects:@"mac",@"imac",@"mac pro",nil];    NSDictionary *myDictionary = [NSDictionary dictionaryWithObjectsAndKeys:array1,@"mobile",array2,@"computers",nil];                NSString* path = NSHomeDirectory();        NSFileManager *fileManager = [NSFileManager defaultManager];       NSArray *directoryPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);        NSString *documentDirectory = [directoryPath objectAtIndex:0];        NSString *filePath = [documentDirectory stringByAppendingPathComponent: @"aaaa"];    if(![fileManager fileExistsAtPath: filePath])    {        [fileManager createFileAtPath: path contents: nil attributes:nil];    }        //write    [myDictionary writeToFile: filePath atomically:YES];         //read    NSDictionary* read = [NSDictionary dictionaryWithContentsOfFile: filePath];