- (void)viewDidLoad {  [super viewDidLoad];  // Do any additional setup after loading the view, typically from a nib.    //增加右側按鈕  [self addRightButton];}#pragma -mark -functions//增加右側按鈕-(void)addRightButton{  UIBarButtonItem *selectButton = [[UIBarButtonItem alloc] initWithTitle:@"篩選" style:UIBarButtonItemStyleDone target:self action:@selector(doClickRightButton)];  self.navigationItem.rightBarButtonItem = selectButton;}#pragma -mark -doClickAction-(void)doClickRightButton{  FirstViewController *first=[[FirstViewController alloc]init];  [self.navigationController pushViewController:first animated:NO];}