xcode 多行导航栏标题
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Multiline Navigationbar Title
提问by Cody Harness
I am trying to set the title label in my navigation bar to allow multiple lines. I have custom navigation controller code that I am placing the multiline code into. I know that the code already there works, but my multiline part is not working.
我试图在我的导航栏中设置标题标签以允许多行。我有自定义导航控制器代码，我将多行代码放入其中。我知道那里的代码有效，但我的多行部分无效。
let titleLabel = UILabel()
titleLabel.frame = CGRectMake(0, 0, self.navigationBar.frame.width, self.navigationBar.frame.height * 2)
titleLabel.numberOfLines = 0
titleLabel.lineBreakMode = .ByWordWrapping
navigationItem.titleView = titleLabel
But the text still runs off at the end. I've also tried putting this into the individual view controller itself, adding self.navigationController?.in front of navigationItemwith the same results.
但文字最后还是跑掉了。我也试过把它放到单独的视图控制器本身中，self.navigationController?.在前面添加navigationItem相同的结果。
Is there something I'm missing in my code that would keep the title label from using multiple lines?
我的代码中是否缺少某些内容可以防止标题标签使用多行？
回答by Rashwan L
Here is a code example of how you can create a multiline navigationBar title
这是如何创建多行导航栏标题的代码示例
let label: UILabel = UILabel(frame: CGRectMake(0, 0, 400, 50))
label.backgroundColor = UIColor.clearColor()
label.numberOfLines = 2
label.font = UIFont.boldSystemFontOfSize(16.0)
label.textAlignment = .Center
label.textColor = UIColor.whiteColor()
label.text = "This is a\nmultiline string for the navBar"
self.navigationItem.titleView = label
Swift 5.x:
斯威夫特 5.x：
let label = UILabel()
label.backgroundColor = .clear
label.numberOfLines = 2
label.font = UIFont.boldSystemFont(ofSize: 16.0)
label.textAlignment = .center
label.textColor = .white
label.text = "This is a\nmultiline string for the navBar"
self.navigationItem.titleView = label
回答by foson
This is doable in a storyboard. Just drag a UIView into the Navigation bar, then drag a UILabel onto it in the document outline, set lines to 2 and alignment to center.
这在故事板中是可行的。只需将一个 UIView 拖到导航栏中，然后在文档大纲中将一个 UILabel 拖到它上面，将行设置为 2 并将对齐设置为居中。
回答by ZiEiTiA
Use this to get the label position exactly as you want it:
使用它可以完全按照您的需要获取标签位置：
let labelWidth = navBar.bounds.width - 110
let label = UILabel(frame: CGRect(x:(navBar.bounds.width/2) - (labelWidth/2), y:0, width:labelWidth, height:navBar.bounds.height))
label.backgroundColor = UIColor.clear
label.numberOfLines = 0
label.font = UIFont.boldSystemFont(ofSize: 13.0)
label.textAlignment = .center
label.textColor = UIColor.black
label.lineBreakMode = .byWordWrapping
label.text = loadedName
navBar.topItem?.title = nil
navBar.addSubview(label)
the 110 value in the top line is the spacing you want either side of the label.
顶行中的 110 值是您希望标签两侧的间距。
