我有一个UILabel，我想在顶部和底部添加空格。在限制最小高度的情况下，我将其修改为:
为了做到这一点，我使用了:
override func drawTextInRect(rect: CGRect) {
var insets: UIEdgeInsets = UIEdgeInsets(top: 0.0, left: 10.0, bottom: 0.0, right: 10.0)
super.drawTextInRect(UIEdgeInsetsInsetRect(rect, insets))
}
但我必须找到不同的方法，因为如果我写了超过两行，问题是一样的:
当前回答
只需要使用UIButton，它已经内置了。关闭所有额外的按钮功能，你有一个标签，你可以设置边缘instets。
let button = UIButton()
button.contentEdgeInsets = UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 5)
button.setTitle("title", for: .normal)
button.tintColor = .white // this will be the textColor
button.isUserInteractionEnabled = false
其他回答
斯威夫特 4+
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.firstLineHeadIndent = 10
// Swift 4.2++
label.attributedText = NSAttributedString(string: "Your text", attributes: [NSAttributedString.Key.paragraphStyle: paragraphStyle])
// Swift 4.1--
label.attributedText = NSAttributedString(string: "Your text", attributes: [NSAttributedStringKey.paragraphStyle: paragraphStyle])
类似于其他答案，但使用func类来动态地设置填充:
class UILabelExtendedView: UILabel
{
var topInset: CGFloat = 4.0
var bottomInset: CGFloat = 4.0
var leftInset: CGFloat = 8.0
var rightInset: CGFloat = 8.0
override func drawText(in rect: CGRect)
{
let insets: UIEdgeInsets = UIEdgeInsets(top: topInset, left: leftInset, bottom: bottomInset, right: rightInset)
super.drawText(in: UIEdgeInsetsInsetRect(rect, insets))
}
override public var intrinsicContentSize: CGSize
{
var contentSize = super.intrinsicContentSize
contentSize.height += topInset + bottomInset
contentSize.width += leftInset + rightInset
return contentSize
}
func setPadding(top: CGFloat, left: CGFloat, bottom: CGFloat, right: CGFloat){
self.topInset = top
self.bottomInset = bottom
self.leftInset = left
self.rightInset = right
let insets: UIEdgeInsets = UIEdgeInsets(top: top, left: left, bottom: bottom, right: right)
super.drawText(in: UIEdgeInsetsInsetRect(self.frame, insets))
}
}
只需使用一个UIView作为一个superview，并定义一个固定的边距标签与自动布局。
在Swift 3中
最好最简单的方法
class UILabelPadded: UILabel {
override func drawText(in rect: CGRect) {
let insets = UIEdgeInsets.init(top: 0, left: 5, bottom: 0, right: 5)
super.drawText(in: UIEdgeInsetsInsetRect(rect, insets))
}
}
