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
简单填充(Swift 3.0, Alvin George回答):
class NewLabel: UILabel {
override func textRect(forBounds bounds: CGRect, limitedToNumberOfLines numberOfLines: Int) -> CGRect {
return self.bounds.insetBy(dx: CGFloat(15.0), dy: CGFloat(15.0))
}
override func draw(_ rect: CGRect) {
super.drawText(in: self.bounds.insetBy(dx: CGFloat(5.0), dy: CGFloat(5.0)))
}
}
其他回答
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
严格适用于单行标签:(2021语法)
对于任何谷歌这里谁需要在严格单行标签填充(如节标题或其他列表项)，
语法发生了很大变化。当心互联网上的过时信息。
下面是要复制和粘贴的确切类:
// add 100 above, 50 padding below a SINGLE-LINE label
import UIKit
class SingleLineLabelWithSpacing: UILabel {
// STRICTLY for SINGLE LINE labels
// only works with SINGLE LINE labels
override func drawText(in rect: CGRect) {
let insets: UIEdgeInsets = UIEdgeInsets(
top: 100, left: 0, bottom: 50, right: 0)
super.drawText(in: rect.inset(by: insets))
}
override var intrinsicContentSize: CGSize {
var ic = super.intrinsicContentSize
ic.height = ic.height + 150
return ic
}
}
在这个例子中，填充大于或小于100/50。
当您有任何类型的滚动列表、提要或其他列表时，这是通常要做的事情。
这样你就不必考虑标题上方/下方的空格，用户名等等——你只需要把它放到堆栈视图或其他任何情况下。
当然，当设计师想要调整时，你也可以在任何地方同时更改这两个值。
提醒:如果你想真正填充一个UILabel，让它无论文本行数、动态大小单元格、动画等等都能完美工作，这是非常复杂的。唯一正确的答案是:https://stackoverflow.com/a/58876988/294884
斯威夫特 4+
class EdgeInsetLabel: UILabel {
var textInsets = UIEdgeInsets.zero {
didSet { invalidateIntrinsicContentSize() }
}
override func textRect(forBounds bounds: CGRect, limitedToNumberOfLines numberOfLines: Int) -> CGRect {
let textRect = super.textRect(forBounds: bounds, limitedToNumberOfLines: numberOfLines)
let invertedInsets = UIEdgeInsets(top: -textInsets.top,
left: -textInsets.left,
bottom: -textInsets.bottom,
right: -textInsets.right)
return textRect.inset(by: invertedInsets)
}
override func drawText(in rect: CGRect) {
super.drawText(in: rect.inset(by: textInsets))
}
}
用法:
let label = EdgeInsetLabel()
label.textInsets = UIEdgeInsets(top: 2, left: 6, bottom: 2, right: 6)
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))
}
}
