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
Swift 3代码及其实现示例
class UIMarginLabel: UILabel {
var topInset: CGFloat = 0
var rightInset: CGFloat = 0
var bottomInset: CGFloat = 0
var leftInset: CGFloat = 0
override func drawText(in rect: CGRect) {
let insets: UIEdgeInsets = UIEdgeInsets(top: self.topInset, left: self.leftInset, bottom: self.bottomInset, right: self.rightInset)
self.setNeedsLayout()
return super.drawText(in: UIEdgeInsetsInsetRect(rect, insets))
}
}
class LabelVC: UIViewController {
//Outlets
@IBOutlet weak var labelWithMargin: UIMarginLabel!
override func viewDidLoad() {
super.viewDidLoad()
//Label settings.
labelWithMargin.leftInset = 10
view.layoutIfNeeded()
}
}
不要忘记在故事板标签对象中添加类名UIMarginLabel。 编码快乐!
其他回答
子类UILabel。(File-New-File- CocoaTouchClass-make UILabel的子类)。
// sampleLabel.swift
import UIKit
class sampleLabel: UILabel {
let topInset = CGFloat(5.0), bottomInset = CGFloat(5.0), leftInset = CGFloat(8.0), rightInset = CGFloat(8.0)
override func drawTextInRect(rect: CGRect) {
let insets: UIEdgeInsets = UIEdgeInsets(top: topInset, left: leftInset, bottom: bottomInset, right: rightInset)
super.drawTextInRect(UIEdgeInsetsInsetRect(rect, insets))
}
override func intrinsicContentSize() -> CGSize {
var intrinsicSuperViewContentSize = super.intrinsicContentSize()
intrinsicSuperViewContentSize.height += topInset + bottomInset
intrinsicSuperViewContentSize.width += leftInset + rightInset
return intrinsicSuperViewContentSize
}
}
ViewController:
override func viewDidLoad() {
super.viewDidLoad()
let labelName = sampleLabel(frame: CGRectMake(0, 100, 300, 25))
labelName.text = "Sample Label"
labelName.backgroundColor = UIColor.grayColor()
labelName.textColor = UIColor.redColor()
labelName.shadowColor = UIColor.blackColor()
labelName.font = UIFont(name: "HelveticaNeue", size: CGFloat(22))
self.view.addSubview(labelName)
}
或者将Storyboard上的自定义UILabel类关联为Label的类。
你可以从IB正确地做到:
将文本更改为带属性
使用"…"进入下拉列表
你会看到一些填充属性的行，段落和文本变化缩进第一行或任何你想要的
检查结果
斯威夫特3
import UIKit
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(top: topInset, left: leftInset, bottom: bottomInset, right: rightInset)
super.drawText(in: UIEdgeInsetsInsetRect(rect, insets))
}
override var intrinsicContentSize: CGSize {
get {
var contentSize = super.intrinsicContentSize
contentSize.height += topInset + bottomInset
contentSize.width += leftInset + rightInset
return contentSize
}
}
}
另一个没有子类化的选项是:
设置标签文本 sizeToFit () 然后稍微增加标签高度以模拟填充 标签。text = "someText" 标签。textAlignment = .center label.sizeToFit () label.frame = CGRect(x: label.frame.x, y: label.frame.y,width: label.frame.width + 20,height: label.frame.height + 8)
