ios - 为什么我的 UIBarButtonItem 没有标题？

Question

我想制作一个带有圆形边框的 UIBarButtonItem。

    let postButton = UIButton(type: .Custom)
    postButton.frame = CGRectMake(0, 0, 90, 30)
    postButton.layer.borderColor = logoColor(0).CGColor
    postButton.layer.borderWidth = CGFloat(3.0)
    postButton.layer.cornerRadius = 4.0
    postButton.clipsToBounds = true
    postButton.titleLabel?.font = UIFont(name: "Lato-Bold", size: 10.0)
    postButton.titleLabel?.textAlignment  = .Center
    postButton.titleLabel?.textColor = UIColor.blackColor()
    postButton.setTitle("post", forState: .Normal)
    postButtonBar = UIBarButtonItem(customView: postButton)

    navigationItem.rightBarButtonItems = [ postButtonBar ]

我试过了，但结果是一个没有标题的红色轮廓按钮。

Answer 1

如果您正确构建按钮，您的代码将正常工作:

    let postButton = UIButton(type: .Custom)
    postButton.frame = CGRectMake(0, 0, 90, 30)
    postButton.layer.borderColor = UIColor.redColor().CGColor
    postButton.layer.borderWidth = CGFloat(3.0)
    postButton.layer.cornerRadius = 4.0
    postButton.clipsToBounds = true
    postButton.setTitle("post", forState: .Normal)
    postButton.setTitleColor(UIColor.blackColor(), forState: .Normal)
    postButton.titleLabel?.font = UIFont(name: "GillSans", size: 10.0)
    postButton.setTitleColor(UIColor.grayColor(), forState: .Highlighted)
    let postButtonBar = UIBarButtonItem(customView: postButton)

我替换了不同的字体，因为我没有你的字体...我还添加了灰色突出显示，以便按钮在点击时显示响应。