xcode 导航控制器中的取消按钮而不是后退按钮
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Cancel button instead of a back button in Navigation Controller
提问by jilu
I have a general question concerning the navigation between views.
我有一个关于视图之间导航的一般问题。
I have a view controller 1 embeded in a navigation controller. In the nav bar, I have a button to do add data, when pushed, it goes to view controller 2 through segue Show (in Storyboard). In view controller 2, I return to view controller 1 after collecting data when I click the button save in nav bar on the right. I collect data with:
我有一个嵌入在导航控制器中的视图控制器 1。在导航栏中，我有一个按钮来添加数据，按下时，它会通过 segue Show（在 Storyboard 中）转到视图控制器 2。在视图控制器 2 中，当我单击右侧导航栏中的保存按钮时，我在收集数据后返回到视图控制器 1。我收集数据：
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {...}
I would prefer instead of a back button to have a cancel button in the view controller 2 to return to view controller 1.
我更喜欢在视图控制器 2 中使用取消按钮而不是后退按钮返回到视图控制器 1。
I feel something is wrong in my design but I dont know what.
我觉得我的设计有问题，但我不知道是什么。
In fact I am looking for something very similar to app clock.
事实上，我正在寻找与应用时钟非常相似的东西。
Do you have any idea?
你有什么主意吗？
Edit: Here is the story board. you will notice the loop beween the two controller. how to do when I click save to not have a back button automatically on the first controller?
编辑：这是故事板。您会注意到两个控制器之间的循环。当我点击保存在第一个控制器上没有自动返回按钮时怎么办？
回答by Leo Dabus
You just have to select your UIBarButtonItem, click at show Attributes Inspector, click at Identifier and select "Cancel" from the drop-down menu.
您只需要选择您的 UIBarButtonItem，单击显示属性检查器，单击标识符并从下拉菜单中选择“取消”。
@IBAction func cancelDownload(sender: AnyObject) {
dismissViewControllerAnimated(true, completion: nil)
}
回答by Shaan Singh
You can customize the text of the back button by adding this code to the view controller that contains it (in viewDidLoad):
您可以通过将此代码添加到包含它的视图控制器（在 中viewDidLoad）来自定义后退按钮的文本：
let backItem = UIBarButtonItem(title: "Cancel", style: .Bordered, target: nil, action: nil)
navigationItem.backBarButtonItem = backItem
