如何在UITextField中将垂直属性的文本（自定义占位符字体）居中？

Question

我正在使用属性文本属性在UITExtfield中设置自定义占位符字体。 但是我的占位符文本不是垂直居中。 这是预览

        let font = UIFont(name: Font.myFont.name, size: 15)!
        let attributes = [
            NSForegroundColorAttributeName: UIColor.cadetGrey,
            NSFontAttributeName: font
        ]

        exampleTextField.attributedPlaceholder = NSAttributedString(string: "Example Placeholder",
                                                                  attributes: attributes)

我试图添加

let centeredParagraphStyle = NSMutableParagraphStyle()
centeredParagraphStyle.alignment = .center

归因于仍然没有运气。 我也尝试在UITextBox上使用SizeToFit（），但没有运气

Answer 1

尝试这样：

let centeredParagraphStyle = NSMutableParagraphStyle()
centeredParagraphStyle.alignment = .center

let attributes: [String : Any] = [NSParagraphStyleAttributeName: centeredParagraphStyle]

Answer 2

这将设置placeholder和用户在中心输入的文本。

 exampleTextField.textAlignment = .center

使vertically和horizontally居中。

exampleTextField.contentVerticalAlignment = UIControlContentVerticalAlignment.center

exampleTextField.textAlignment = .center

要么

这只会将placeholder设置在中心，而用户输入的文本将保留在其默认位置，即left align

let font = UIFont(name: Font.myFont.name, size: 15)!

 let centeredParagraphStyle = NSMutableParagraphStyle()
 centeredParagraphStyle.alignment = .center

 // add attribute of NSMutableParagraphStyle
 let attributes = [
            NSForegroundColorAttributeName: UIColor.gray,
            NSFontAttributeName: font,
            NSParagraphStyleAttributeName: centeredParagraphStyle
        ]

 exampleTextField.attributedPlaceholder = NSAttributedString(string: "Example Placeholder",
                                                                    attributes: attributes)