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:
我在公认的答案中略加修改。有一个问题,当左tinset和右tinset增加时,一部分文字会消失,b/c标签的宽度会变窄,但高度没有增加,如图所示:
要解决这个问题,你需要重新计算文本的高度,如下所示:
@IBDesignable class PaddingLabel: UILabel {
@IBInspectable var topInset: CGFloat = 20.0
@IBInspectable var bottomInset: CGFloat = 20.0
@IBInspectable var leftInset: CGFloat = 20.0
@IBInspectable var rightInset: CGFloat = 20.0
override func drawTextInRect(rect: CGRect) {
let insets = UIEdgeInsets(top: topInset, left: leftInset, bottom: bottomInset, right: rightInset)
super.drawTextInRect(UIEdgeInsetsInsetRect(rect, insets))
}
override func intrinsicContentSize() -> CGSize {
var intrinsicSuperViewContentSize = super.intrinsicContentSize()
let textWidth = frame.size.width - (self.leftInset + self.rightInset)
let newSize = self.text!.boundingRectWithSize(CGSizeMake(textWidth, CGFloat.max), options: NSStringDrawingOptions.UsesLineFragmentOrigin, attributes: [NSFontAttributeName: self.font], context: nil)
intrinsicSuperViewContentSize.height = ceil(newSize.size.height) + self.topInset + self.bottomInset
return intrinsicSuperViewContentSize
}
}
和结果:
我希望能帮助一些和我处境相同的人。
根据Swift 4.2 (Xcode 10 beta 6)"UIEdgeInsetsInsetRect"已弃用。
我还将类声明为public以使其更有用。
public class UIPaddedLabel: 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
public override func drawText(in rect: CGRect) {
let insets = UIEdgeInsets.init(top: topInset, left: leftInset, bottom: bottomInset, right: rightInset)
super.drawText(in: rect.inset(by: insets))
}
public override var intrinsicContentSize: CGSize {
let size = super.intrinsicContentSize
return CGSize(width: size.width + leftInset + rightInset,
height: size.height + topInset + bottomInset)
}
public override func sizeToFit() {
super.sizeThatFits(intrinsicContentSize)
}
}
如果在应用填充时遇到文本修剪问题,请使用此代码。
@IBDesignable class PaddingLabel: UILabel {
@IBInspectable var topInset: CGFloat = 5.0
@IBInspectable var bottomInset: CGFloat = 5.0
@IBInspectable var leftInset: CGFloat = 5.0
@IBInspectable var rightInset: CGFloat = 5.0
override func drawText(in rect: CGRect) {
let insets = UIEdgeInsets.init(top: topInset, left: leftInset, bottom: bottomInset, right: rightInset)
super.drawText(in: UIEdgeInsetsInsetRect(rect, insets))
}
override var intrinsicContentSize: CGSize {
var intrinsicSuperViewContentSize = super.intrinsicContentSize
let textWidth = frame.size.width - (self.leftInset + self.rightInset)
let newSize = self.text!.boundingRect(with: CGSize(textWidth, CGFloat.greatestFiniteMagnitude), options: NSStringDrawingOptions.usesLineFragmentOrigin, attributes: [NSFontAttributeName: self.font], context: nil)
intrinsicSuperViewContentSize.height = ceil(newSize.size.height) + self.topInset + self.bottomInset
return intrinsicSuperViewContentSize
}
}
extension CGSize{
init(_ width:CGFloat,_ height:CGFloat) {
self.init(width:width,height:height)
}
}
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