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:
我已经尝试了Swift 4.2,希望它对你有用!
@IBDesignable class PaddingLabel: UILabel {
@IBInspectable var topInset: CGFloat = 5.0
@IBInspectable var bottomInset: CGFloat = 5.0
@IBInspectable var leftInset: CGFloat = 7.0
@IBInspectable var rightInset: CGFloat = 7.0
override func drawText(in rect: CGRect) {
let insets = UIEdgeInsets(top: topInset, left: leftInset, bottom: bottomInset, right: rightInset)
super.drawText(in: rect.inset(by: insets))
}
override var intrinsicContentSize: CGSize {
let size = super.intrinsicContentSize
return CGSize(width: size.width + leftInset + rightInset,
height: size.height + topInset + bottomInset)
}
override var bounds: CGRect {
didSet {
// ensures this works within stack views if multi-line
preferredMaxLayoutWidth = bounds.width - (leftInset + rightInset)
}
}
}
或者你可以在这里使用CocoaPods https://github.com/levantAJ/PaddingLabel
吊舱' paddle标签','1.2'
就像其他答案一样,但它修复了一个bug:
当标签。宽度由自动布局控制,有时文本会被裁剪。
@IBDesignable
class InsetLabel: UILabel {
@IBInspectable var topInset: CGFloat = 4.0
@IBInspectable var leftInset: CGFloat = 4.0
@IBInspectable var bottomInset: CGFloat = 4.0
@IBInspectable var rightInset: CGFloat = 4.0
var insets: UIEdgeInsets {
get {
return UIEdgeInsets.init(top: topInset, left: leftInset, bottom: bottomInset, right: rightInset)
}
set {
topInset = newValue.top
leftInset = newValue.left
bottomInset = newValue.bottom
rightInset = newValue.right
}
}
override func sizeThatFits(_ size: CGSize) -> CGSize {
var adjSize = super.sizeThatFits(size)
adjSize.width += leftInset + rightInset
adjSize.height += topInset + bottomInset
return adjSize
}
override var intrinsicContentSize: CGSize {
let systemContentSize = super.intrinsicContentSize
let adjustSize = CGSize(width: systemContentSize.width + leftInset + rightInset, height: systemContentSize.height + topInset + bottomInset)
if adjustSize.width > preferredMaxLayoutWidth && preferredMaxLayoutWidth != 0 {
let constraintSize = CGSize(width: bounds.width - (leftInset + rightInset), height: .greatestFiniteMagnitude)
let newSize = super.sizeThatFits(constraintSize)
return CGSize(width: systemContentSize.width, height: ceil(newSize.height) + topInset + bottomInset)
} else {
return adjustSize
}
}
override func drawText(in rect: CGRect) {
super.drawText(in: rect.inset(by: insets))
}
}
如果你不想或需要在Storyboard中使用@IBInspectable / @IBDesignable UILabel(我认为那些渲染太慢了),那么使用UIEdgeInsets而不是4个不同的cgfloat会更干净。
Swift 4.2的代码示例:
class UIPaddedLabel: UILabel {
var padding = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
public override func drawText(in rect: CGRect) {
super.drawText(in: rect.inset(by: padding))
}
public override var intrinsicContentSize: CGSize {
let size = super.intrinsicContentSize
return CGSize(width: size.width + padding.left + padding.right,
height: size.height + padding.top + padding.bottom)
}
}
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