請告訴我。我正在嘗試從navigationItem中爲題目和圖像分配UIButton。碑文顯示正常,但圖像沒有出現,而其下的凹陷具有(銘文從中央右移)NavigationItem中的UIButton圖像
UIButton* openMenu = [UIButton buttonWithType:UIButtonTypeCustom];
[openMenu addTarget:self action:@selector(openCloseMenuAction:) forControlEvents:UIControlEventTouchUpInside];
[openMenu setTitle:@"title" forState:UIControlStateNormal];
[openMenu setImage:[UIImage imageNamed:@"downButton.png"] forState:UIControlStateNormal];
self.navigationController.navigationBar.topItem.titleView = openMenu;