UIButton设置图片在文字左、右、上、下
源代码：
import UIKit
enum LZKJImageAlignment: NSInteger {
case left = 0
case top
case bottom
case right
}
class LZKJVideoCustomButton: UIButton {
var imageAlignment: LZKJImageAlignment = .left
var spaceBetweenTitleAndImage: CGFloat = 0
override func layoutSubviews() {
super.layoutSubviews()
let space: CGFloat = self.spaceBetweenTitleAndImage
let titleW: CGFloat = self.titleLabel?.bounds.width ?? 0
let titleH: CGFloat = self.titleLabel?.bounds.height ?? 0
let imageW: CGFloat = self.imageView?.bounds.width ?? 0
let imageH: CGFloat = self.imageView?.bounds.height ?? 0
let btnCenterX: CGFloat = self.bounds.width / 2
let imageCenterX: CGFloat = btnCenterX - titleW / 2
let titleCenterX = btnCenterX + imageW / 2
switch self.imageAlignment {
case .top:
self.titleEdgeInsets = UIEdgeInsets(top: imageH / 2 + space / 2, left: -(titleCenterX - btnCenterX), bottom: -(imageH/2 + space/2), right: titleCenterX-btnCenterX)
self.imageEdgeInsets = UIEdgeInsets(top: -(titleH / 2 + space / 2), left: btnCenterX - imageCenterX, bottom: titleH / 2 + space / 2, right: -(btnCenterX - imageCenterX));
case .left:
self.titleEdgeInsets = UIEdgeInsets(top: 0, left: space / 2, bottom: 0, right: -space / 2);
self.imageEdgeInsets = UIEdgeInsets(top: 0, left: -space / 2, bottom: 0, right: space);
case .bottom:
self.titleEdgeInsets = UIEdgeInsets(top: -(imageH / 2 + space / 2), left: -(titleCenterX - btnCenterX), bottom: imageH / 2 + space / 2, right: titleCenterX - btnCenterX);
self.imageEdgeInsets = UIEdgeInsets(top: titleH / 2 + space / 2, left: btnCenterX - imageCenterX,bottom: -(titleH / 2 + space / 2), right: -(btnCenterX - imageCenterX));
case .right:
self.titleEdgeInsets = UIEdgeInsets(top: 0, left: -(imageW + space / 2), bottom: 0, right: imageW + space / 2);
self.imageEdgeInsets = UIEdgeInsets(top: 0, left: titleW + space / 2, bottom: 0, right: -(titleW + space / 2));
}
}
}
使用方式
.imageAlignment = .bottom
效果图：
图片靠右：
图片靠下：
