我想设置一个UILabel的左插图/边距,但找不到这样做的方法。标签有一个背景集,所以仅仅改变它的原点是行不通的。这将是理想的插入文本10px左右在左手边。
当前回答
Xcode 6.1.1 Swift扩展解决方案。
文件名可以是"UILabel+AddInsetMargin.swift":
import UIKit
extension UILabel
{
public override func drawRect(rect: CGRect)
{
self.drawTextInRect(UIEdgeInsetsInsetRect(rect, UIEdgeInsets(top: 0, left: 5, bottom: 0, right: 5)))
}
}
其他回答
Swift 3 &自动布局兼容版本:
class InsetLabel: UILabel {
var insets = UIEdgeInsets()
convenience init(insets: UIEdgeInsets) {
self.init(frame: CGRect.zero)
self.insets = insets
}
convenience init(dx: CGFloat, dy: CGFloat) {
let insets = UIEdgeInsets(top: dy, left: dx, bottom: dy, right: dx)
self.init(insets: insets)
}
override func drawText(in rect: CGRect) {
super.drawText(in: UIEdgeInsetsInsetRect(rect, insets))
}
override var intrinsicContentSize: CGSize {
var size = super.intrinsicContentSize
size.width += insets.left + insets.right
size.height += insets.top + insets.bottom
return size
}
}
你需要计算UILabel大小,当你放置嵌入。它可以有不同的行数,因为文本对齐,换行模式。
override func drawText(in rect: CGRect) {
let size = self.sizeThatFits(UIEdgeInsetsInsetRect(rect, insets).size);
super.drawText(in: CGRect.init(origin: CGPoint.init(x: insets.left, y: insets.top), size: size));
}
override var intrinsicContentSize: CGSize {
var size = super.intrinsicContentSize;
if text == nil || text?.count == 0 {
return size;
}
size = self.sizeThatFits(UIEdgeInsetsInsetRect(CGRect.init(origin: CGPoint.zero, size: size), insets).size);
size.width += self.insets.left + self.insets.right;
size.height += self.insets.top + self.insets.bottom;
return size;
}
尝试 iEun/InsetLabel
对于这样一个简单的情况,子类化有点麻烦。另一种方法是将没有背景设置的UILabel添加到有背景设置的UIView中。将标签的x设置为10,并使外部视图的大小比标签宽20个像素。
我通过子类化UILabel和重写drawTextInRect来解决这个问题:
- (void)drawTextInRect:(CGRect)rect {
UIEdgeInsets insets = {0, 5, 0, 5};
[super drawTextInRect:UIEdgeInsetsInsetRect(rect, insets)];
}
斯威夫特3.1:
override func drawText(in rect: CGRect) {
let insets = UIEdgeInsets.init(top: 0, left: 5, bottom: 0, right: 5)
super.drawText(in: UIEdgeInsetsInsetRect(rect, insets))
}
斯威夫特4.2.1:准备
override func drawText(in rect: CGRect) {
let insets = UIEdgeInsets(top: 0, left: 5, bottom: 0, right: 5)
super.drawText(in: rect.inset(by: insets))
}
你可能已经猜到了,这是对tc的改编。的答案。它有两个优点:
没有必要通过发送sizeToFit消息来触发它 它只保留标签框架——如果你的标签有背景,而你不想让它缩小,这很方便
和@IBDesignable,使其与接口生成器一起工作
斯威夫特4
//
// PaddedLabel.swift
// TrainCentric
//
// Created by Arsonik
// https://stackoverflow.com/a/33244365/337934
//
import UIKit
@IBDesignable
class PaddedLabel: UILabel {
@IBInspectable var inset:CGSize = CGSize(width: 0, height: 0)
var padding: UIEdgeInsets {
var hasText:Bool = false
if let t = self.text?.count, t > 0 {
hasText = true
}
else if let t = attributedText?.length, t > 0 {
hasText = true
}
return hasText ? UIEdgeInsets(top: inset.height, left: inset.width, bottom: inset.height, right: inset.width) : UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
}
override func drawText(in rect: CGRect) {
super.drawText(in: rect.inset(by: padding))
}
override var intrinsicContentSize: CGSize {
let superContentSize = super.intrinsicContentSize
let p = padding
let width = superContentSize.width + p.left + p.right
let heigth = superContentSize.height + p.top + p.bottom
return CGSize(width: width, height: heigth)
}
override func sizeThatFits(_ size: CGSize) -> CGSize {
let superSizeThatFits = super.sizeThatFits(size)
let p = padding
let width = superSizeThatFits.width + p.left + p.right
let heigth = superSizeThatFits.height + p.top + p.bottom
return CGSize(width: width, height: heigth)
}
}
斯威夫特2
@IBDesignable
class PaddedLabel: UILabel {
@IBInspectable var inset:CGSize = CGSize(width: 0, height: 0)
var padding: UIEdgeInsets {
var hasText:Bool = false
if let t = text?.length where t > 0 {
hasText = true
}
else if let t = attributedText?.length where t > 0 {
hasText = true
}
return hasText ? UIEdgeInsets(top: inset.height, left: inset.width, bottom: inset.height, right: inset.width) : UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
}
override func drawTextInRect(rect: CGRect) {
super.drawTextInRect(UIEdgeInsetsInsetRect(rect, padding))
}
override func intrinsicContentSize() -> CGSize {
let superContentSize = super.intrinsicContentSize()
let p = padding
let width = superContentSize.width + p.left + p.right
let heigth = superContentSize.height + p.top + p.bottom
return CGSize(width: width, height: heigth)
}
override func sizeThatFits(size: CGSize) -> CGSize {
let superSizeThatFits = super.sizeThatFits(size)
let p = padding
let width = superSizeThatFits.width + p.left + p.right
let heigth = superSizeThatFits.height + p.top + p.bottom
return CGSize(width: width, height: heigth)
}
}
推荐文章
- 如何删除默认的导航栏空间在SwiftUI导航视图
- 如何在iOS中使用Swift编程segue
- Swift -整数转换为小时/分钟/秒
- Swift:声明一个空字典
- 在成功提交我的应用程序后,“太多符号文件”
- 首先添加一个UIView,甚至是导航栏
- 我如何改变UIButton标题颜色?
- 如何从UIImage (Cocoa Touch)或CGImage (Core Graphics)获取像素数据?
- 在Swift中如何调用GCD主线程上的参数方法?
- NSLayoutConstraints是可动画的吗?
- iOS -构建失败,CocoaPods无法找到头文件
- CFNetwork SSLHandshake iOS 9失败
- 请求失败:不可接受的内容类型:文本/html使用AFNetworking 2.0
- 缺少推荐的图标文件-该包不包含iPhone / iPod Touch的应用程序图标,像素为“120x120”,png格式
- 以编程方式创建segue