//
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// UIButtonExtension.swift
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// THProject
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//
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// Created by alvin_y on 2018/4/8.
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// Copyright © 2018年 yang-wang. All rights reserved.
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//
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import Foundation
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import Foundation
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import UIKit
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private var key: Void?
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/// 取消高亮状态按钮
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class ButtonHighlightedNormal: UIButton {
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override init(frame: CGRect) {
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super.init(frame: frame)
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}
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required init?(coder aDecoder: NSCoder) {
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super.init(coder: aDecoder)
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}
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override var isHighlighted: Bool{
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get {
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return false
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}
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set {
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super.isHighlighted = false
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}
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}
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}
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extension UIButton {
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// 图片文字
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enum ImagePosition {
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case left
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case right
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case top
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case bottom
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}
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// 渐变方式
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enum GradientType {
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case topToBottom // 上到下
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case leftToRight // 左到右
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case upleftTolowRight // 左上到右下
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case uprightTolowLeft // 右上到左下
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}
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/// 利用 runtime 添加一个 indexPath 属性
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var indexPath: IndexPath? {
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get {
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return objc_getAssociatedObject(self, &key) as? IndexPath
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}
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set(newValue) {
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objc_setAssociatedObject(self, &key, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
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}
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}
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/// 调整图片位置，返回调整后所需要的size
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/// 调用本方法前，请先确保imageView和titleLabel有值。
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@discardableResult
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func adjustImage(position: ImagePosition, spacing: CGFloat) -> CGSize {
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guard imageView != nil && titleLabel != nil else {
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return CGSize.zero
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}
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let imageSize = self.imageView!.intrinsicContentSize
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let titleSize = self.titleLabel!.intrinsicContentSize
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// 布局
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switch (position) {
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case .left:
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imageEdgeInsets = UIEdgeInsets(top: 0, left: -spacing / 2, bottom: 0, right: spacing / 2)
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titleEdgeInsets = UIEdgeInsets(top: 0, left: spacing / 2, bottom: 0, right: -spacing / 2)
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contentEdgeInsets = UIEdgeInsets(top: 0, left: spacing / 2, bottom: 0, right: spacing / 2)
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case .right:
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imageEdgeInsets = UIEdgeInsets(top: 0, left: (titleSize.width + spacing / 2), bottom: 0, right: -(titleSize.width + spacing / 2))
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titleEdgeInsets = UIEdgeInsets(top: 0, left: -(imageSize.width + spacing / 2), bottom: 0, right: (imageSize.width + spacing / 2))
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contentEdgeInsets = UIEdgeInsets(top: 0, left: spacing / 2, bottom: 0, right: spacing / 2);
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case .top, .bottom:
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let imageOffsetX = (imageSize.width + titleSize.width) / 2 - imageSize.width / 2
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let imageOffsetY = imageSize.height / 2 + spacing / 2
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let titleOffsetX = (imageSize.width + titleSize.width / 2) - (imageSize.width + titleSize.width) / 2
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let titleOffsetY = titleSize.height / 2 + spacing / 2
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let changedWidth = titleSize.width + imageSize.width - max(titleSize.width, imageSize.width)
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let changedHeight = titleSize.height + imageSize.height + spacing - max(imageSize.height, imageSize.height)
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if position == .top {
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imageEdgeInsets = UIEdgeInsets(top: -imageOffsetY, left: imageOffsetX, bottom: imageOffsetY, right: -imageOffsetX)
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titleEdgeInsets = UIEdgeInsets(top: titleOffsetY, left: -titleOffsetX, bottom: -titleOffsetY, right: titleOffsetX)
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self.contentEdgeInsets = UIEdgeInsets(top: imageOffsetY, left: -changedWidth / 2, bottom: changedHeight - imageOffsetY, right: -changedWidth / 2);
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} else {
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imageEdgeInsets = UIEdgeInsets(top: imageOffsetY, left: imageOffsetX, bottom: -imageOffsetY, right: -imageOffsetX)
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titleEdgeInsets = UIEdgeInsets(top: -titleOffsetY, left: -titleOffsetX, bottom: titleOffsetY, right: titleOffsetX)
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self.contentEdgeInsets = UIEdgeInsets(top: changedHeight - imageOffsetY, left: -changedWidth / 2, bottom: imageOffsetY, right: -changedWidth / 2);
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}
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}
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return self.intrinsicContentSize
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}
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///MARK: -创建一个mormal btn
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class func yy_creatNormal(title:String, fontSize:CGFloat, textColor:UIColor) -> UIButton {
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return yy_creat(normalTitle: title, selectedTitle: nil, normalTextColor: textColor, selectedTextColor: nil, fontSize: fontSize)
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}
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class func yy_creat(normalTitle:String, selectedTitle:String?, normalTextColor:UIColor, selectedTextColor:UIColor?, fontSize:CGFloat) -> UIButton {
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let btn = UIButton.init(type: .custom)
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btn.setTitle(normalTitle, for: .normal)
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btn.setTitleColor(normalTextColor, for: .normal)
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btn.titleLabel?.font = UIFont.systemFont(ofSize: fontSize)
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if (selectedTitle != nil) {
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btn.setTitle(selectedTitle, for: .selected)
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if (selectedTextColor != nil) {
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btn.setTitleColor(selectedTextColor, for: .selected)
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} else {
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btn.setTitleColor(normalTextColor, for: .selected)
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}
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}
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return btn
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}
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//MARK: - 添加一个渐变背景
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func yy_addGradient(colors:[UIColor],gradientType:GradientType) {
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var otherGradient = UIImage.GradientType.topToBottom
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switch gradientType {
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case .leftToRight:
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otherGradient = UIImage.GradientType.leftToRight
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break
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case .topToBottom:
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otherGradient = UIImage.GradientType.topToBottom
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break
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case .uprightTolowLeft:
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otherGradient = UIImage.GradientType.uprightTolowLeft
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break
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case .upleftTolowRight:
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otherGradient = UIImage.GradientType.upleftTolowRight
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break
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}
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let image = UIImage.yy_creat(size: self.bounds.size, colors: colors, gradientType: otherGradient)
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self.setBackgroundImage(image, for: .normal)
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}
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}
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//MARK: - 自由调整图标按钮中的图标和文字位置
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extension UIButton {
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@objc func set(image anImage: UIImage?, title: String,
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titlePosition: UIView.ContentMode, additionalSpacing: CGFloat, state: UIControl.State){
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self.imageView?.contentMode = .center
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self.setImage(anImage, for: state)
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positionLabelRespectToImage(title: title, position: titlePosition, spacing: additionalSpacing)
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self.titleLabel?.contentMode = .center
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self.setTitle(title, for: state)
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}
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private func positionLabelRespectToImage(title: String, position: UIView.ContentMode,
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spacing: CGFloat) {
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let imageSize = self.imageRect(forContentRect: self.frame)
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let titleFont = self.titleLabel?.font!
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let titleSize = title.size(withAttributes: [NSAttributedString.Key.font: titleFont!])
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var titleInsets: UIEdgeInsets
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var imageInsets: UIEdgeInsets
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switch (position){
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case .top:
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titleInsets = UIEdgeInsets(top: -(imageSize.height + titleSize.height + spacing),
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left: -(imageSize.width), bottom: 0, right: 0)
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imageInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: -titleSize.width)
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case .bottom:
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titleInsets = UIEdgeInsets(top: (imageSize.height + titleSize.height + spacing),
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left: -(imageSize.width), bottom: 0, right: 0)
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imageInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: -titleSize.width)
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case .left:
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titleInsets = UIEdgeInsets(top: 0, left: -(imageSize.width * 2), bottom: 0, right: 0)
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imageInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0,
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right: -(titleSize.width * 2 + spacing))
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case .right:
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titleInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: -spacing)
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imageInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
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default:
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titleInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
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imageInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
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}
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self.titleEdgeInsets = titleInsets
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self.imageEdgeInsets = imageInsets
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}
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}
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