擴(kuò)展UIButton控件，自定義圖片與標(biāo)題位置及間距(默認(rèn)展示圖片在左，標(biāo)題在右，二者間距默認(rèn)為0）

• Example
  1) 圖片在上方，文字在下方
  2) 圖片在左側(cè)，文字在右側(cè)

  
  
  Example

使用方法

• 僅一行代碼即可設(shè)置圖片與標(biāo)題的位置(間距可設(shè)置，默認(rèn)為0個(gè)單位)

button.adjustImageTitlePosition(.top, spacing: 6)

源碼分享

//
//  CCButton.swift
//  HelloSwift
//
//  Created by a51095 on 2021/7/15.
//

extension UIButton {
    /// 逆時(shí)針方向??
    enum Position { case top, left, bottom, right }
    
    /// 重置圖片image與標(biāo)題title位置(默認(rèn)間距為0)
    func adjustImageTitlePosition(_ position: Position, spacing: CGFloat = 0 ) {
        self.sizeToFit()
        
        let imageWidth = self.imageView?.image?.size.width
        let imageHeight = self.imageView?.image?.size.height
        
        let labelWidth = self.titleLabel?.frame.size.width
        let labelHeight = self.titleLabel?.frame.size.height
        
        switch position {
        case .top:
            imageEdgeInsets = UIEdgeInsets(top: -labelHeight! - spacing / 2, left: 0, bottom: 0, right: -labelWidth!)
            titleEdgeInsets = UIEdgeInsets(top: 0, left: -imageWidth!, bottom: -imageHeight! - spacing / 2, right: 0)
            break
            
        case .left:
            imageEdgeInsets = UIEdgeInsets(top: 0, left: -spacing / 2, bottom: 0, right: 0)
            titleEdgeInsets = UIEdgeInsets(top: 0, left: spacing * 1.5, bottom: 0, right: 0)
            break
            
        case .bottom:
            imageEdgeInsets = UIEdgeInsets(top: 0, left: 0, bottom: -labelHeight! - spacing / 2, right: -labelWidth!)
            titleEdgeInsets = UIEdgeInsets(top: -imageHeight! - spacing / 2, left: -imageWidth!, bottom: 0, right: 0)
            break
            
        case .right:
            imageEdgeInsets = UIEdgeInsets(top: 0, left: labelWidth! + spacing / 2, bottom: 0, right: -labelWidth! - spacing / 2)
            titleEdgeInsets = UIEdgeInsets(top: 0, left: -imageWidth! - spacing / 2, bottom: 0, right: imageWidth! + spacing / 2)
            break
        }
    }
}

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