ios - 如何在 iOS 的 UInavigationbar 的中心添加 UIBarbuttonItem

Question

我只在左侧或右侧添加 UIBarbuttonitem。现在我想在 uinavigationbar 的中心添加 UIbarbuttonitem。我怎样才能做到这一点？非常感谢

Answer 1

尝试这个：

 UIButton *titleButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
 [titleButton setFrame:CGRectMake(0, 0, 170, 35)];
 self.navigationItem.titleView =  [[UIBarButtonItem alloc] initWithCustomView:titleButton];

Answer 2

您可以像这样添加另一个 UIBarButtonItem 作为“间隔”：

UIBarButtonItem *barButton = [[UIBarButtonItem alloc] initWithTitle:@"Button" style:UIBarButtonItemStyleBordered target:self action:@selector(buttonTapped)];
UIBarButtonItem *spacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
spacer.width = 125.0f;

[self.navigationItem setRightBarButtonItems:[NSArray arrayWithObjects:spacer, barButton, nil]];