xcode 左栏按钮项目
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Left bar button Item
提问by Mikael Weiss
so if you have a navigation controller with no bar button Items then a navigation back button will show up with the name of the last View Controller and I want to keep that, as in I don't want to have to hardCode it. and I do know how to add it in but I don't want to have to do that because that leaves more room for bugs. Is there a way that I can have a left bar button Item and the default one doesn't go away?
因此，如果您有一个没有条形按钮项的导航控制器，那么导航后退按钮将显示最后一个视图控制器的名称，我想保留它，因为我不想对其进行硬编码。而且我确实知道如何添加它，但我不想这样做，因为这会为错误留下更多空间。有没有办法让我有一个左栏按钮 Item 而默认的按钮不会消失？
回答by RajeshKumar R
Add this in viewController where you want to have default back button and custom bar button item. You can customise the bar button item.
在 viewController 中添加它，您希望在其中拥有默认后退按钮和自定义栏按钮项。您可以自定义条形按钮项。
override func viewDidLoad() {
super.viewDidLoad()
let newBtn = UIBarButtonItem(title: "new", style: .plain, target: self, action: #selector(anotherMethod))
self.navigationItem.leftItemsSupplementBackButton = true
self.navigationItem.leftBarButtonItem = newBtn//self.navigationItem.leftBarButtonItems = [newBtn,anotherBtn]
}
