Swift设置图片在Button的位置（上下左右及间距）
import UIKit
extension UIButton {
/** 图片在左，标题在右 */
func setIconInLeft() {
setIconInLeftWithSpacing(0)
}
/** 图片在右，标题在左 */
func setIconInRight() {
setIconInRightWithSpacing(0)
}
/** 图片在上，标题在下 */
func setIconInTop() {
setIconInTopWithSpacing(0)
}
/** 图片在下，标题在上 */
func setIconInBottom() {
setIconInBottomWithSpacing(0)
}
//** 可以自定义图片和标题间的间隔 */
func setIconInLeftWithSpacing(_ Spacing: CGFloat) {
titleEdgeInsets = UIEdgeInsets()
titleEdgeInsets.top = 0
titleEdgeInsets.`left` = 0
titleEdgeInsets.bottom = 0
titleEdgeInsets.`right` = 0
imageEdgeInsets = UIEdgeInsets()
imageEdgeInsets.top = 0
imageEdgeInsets.`left` = 0
imageEdgeInsets.bottom = 0
imageEdgeInsets.`right` = 0
}
func setIconInRightWithSpacing(_ Spacing: CGFloat) {
let img_W: CGFloat? = imageView?.frame.size.width
let tit_W: CGFloat? = titleLabel?.frame.size.width
titleEdgeInsets = UIEdgeInsets()
titleEdgeInsets.top = 0
titleEdgeInsets.`left` = -(img_W + Spacing / 2)
titleEdgeInsets.bottom = 0
titleEdgeInsets.`right` = img_W + Spacing / 2
imageEdgeInsets = UIEdgeInsets()
imageEdgeInsets.top = 0
imageEdgeInsets.`left` = tit_W + Spacing / 2
imageEdgeInsets.bottom = 0
imageEdgeInsets.`right` = -(tit_W + Spacing / 2)
}
func setIconInTopWithSpacing(_ Spacing: CGFloat) {
let img_W: CGFloat? = imageView?.frame.size.width
let img_H: CGFloat? = imageView?.frame.size.height
let tit_W: CGFloat? = titleLabel?.frame.size.width
let tit_H: CGFloat? = titleLabel?.frame.size.height
titleEdgeInsets = UIEdgeInsets()
titleEdgeInsets.top = tit_H / 2 + Spacing / 2
titleEdgeInsets.`left` = -(img_W / 2)
titleEdgeInsets.bottom = -(tit_H / 2 + Spacing / 2)
titleEdgeInsets.`right` = img_W / 2
imageEdgeInsets = UIEdgeInsets()
imageEdgeInsets.top = -(img_H / 2 + Spacing / 2)
imageEdgeInsets.`left` = tit_W / 2
imageEdgeInsets.bottom = img_H / 2 + Spacing / 2
imageEdgeInsets.`right` = -(tit_W / 2)
}
func setIconInBottomWithSpacing(_ Spacing: CGFloat) {
let img_W: CGFloat? = imageView?.frame.size.width
let img_H: CGFloat? = imageView?.frame.size.height
let tit_W: CGFloat? = titleLabel?.frame.size.width
let tit_H: CGFloat? = titleLabel?.frame.size.height
titleEdgeInsets = UIEdgeInsets()
titleEdgeInsets.top = -(tit_H / 2 + Spacing / 2)
titleEdgeInsets.`left` = -(img_W / 2)
titleEdgeInsets.bottom = tit_H / 2 + Spacing / 2
titleEdgeInsets.`right` = img_W / 2
imageEdgeInsets = UIEdgeInsets()
imageEdgeInsets.top = img_H / 2 + Spacing / 2
imageEdgeInsets.`left` = tit_W / 2
imageEdgeInsets.bottom = -(img_H / 2 + Spacing / 2)
imageEdgeInsets.`right` = -(tit_W / 2)
}
}
