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
简单的填充:
import UIKit
class NewLabel: UILabel {
override func textRectForBounds(bounds: CGRect, limitedToNumberOfLines numberOfLines: Int) -> CGRect {
return CGRectInset(self.bounds, CGFloat(15.0), CGFloat(15.0))
}
override func drawRect(rect: CGRect) {
super.drawTextInRect(CGRectInset(self.bounds,CGFloat(5.0), CGFloat(5.0)))
}
}
其他回答
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)
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。
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))
}
}
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)
}
}
