89 lines
4.0 KiB
Swift
89 lines
4.0 KiB
Swift
//
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// UIButton+Extension.swift
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// dinoGo
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//
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// Created by osell on 2022/12/7.
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// Copyright © 2022 dino. All rights reserved.
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//
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import Foundation
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extension UIButton {
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/// 设置图片的居中边位置，需要在setImage和setTitle之后调用才生效，且button大小大于图片+文字+间距
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/// - Parameters:
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/// - edge: 仅有image时相对于button，都有时上左下相对于button，右相对于title, 仅有title时相对于button，都有时上右下相对于button，左相对于image
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/// - spacing: 距离
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public func setImageEdge(_ edge: UIRectEdge, spacing: CGFloat) {
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let imageSize = imageView?.image?.size ?? .zero
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let labelSize = titleLabel?.intrinsicContentSize ?? .zero
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switch edge {
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case .left:
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imageEdgeInsets = UIEdgeInsets(top: 0, left: -spacing / 2.0, bottom: 0, right: spacing / 2.0)
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titleEdgeInsets = UIEdgeInsets(top: 0, left: spacing / 2.0, bottom: 0, right: -spacing / 2.0)
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case .right:
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imageEdgeInsets = UIEdgeInsets(top: 0, left: labelSize.width + spacing / 2.0, bottom: 0, right: -labelSize.width - spacing / 2.0)
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titleEdgeInsets = UIEdgeInsets(top: 0, left: -imageSize.width - spacing / 2.0, bottom: 0, right: imageSize.width + spacing / 2.0)
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case .top:
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imageEdgeInsets = UIEdgeInsets(top: -labelSize.height - spacing / 2.0, left: 0, bottom: spacing / 2.0, right: -labelSize.width)
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titleEdgeInsets = UIEdgeInsets(top: spacing / 2.0, left: -imageSize.width, bottom: -imageSize.height - spacing / 2.0, right: 0)
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case .bottom:
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imageEdgeInsets = UIEdgeInsets(top: spacing / 2.0, left: 0, bottom: -labelSize.height - spacing / 2.0, right: -labelSize.width)
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titleEdgeInsets = UIEdgeInsets(top: -imageSize.height - spacing / 2.0, left: -imageSize.width, bottom: spacing / 2.0, right: 0)
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default:
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break
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}
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}
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/// 设置按钮背景颜色
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/// - Parameters:
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/// - backgroundColor: 颜色
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/// - state: 状态
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public func setBackgroundColor(_ backgroundColor: UIColor, for state: UIControl.State) {
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var image: UIImage?
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let rect = CGRect(origin: .zero, size: CGSize(width: 1, height: 1))
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UIGraphicsBeginImageContextWithOptions(rect.size, false, 0)
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if let context = UIGraphicsGetCurrentContext() {
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context.setFillColor(backgroundColor.cgColor)
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context.fill(rect)
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image = UIGraphicsGetImageFromCurrentImageContext()
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}
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UIGraphicsEndImageContext()
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setBackgroundImage(image, for: state)
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}
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}
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// MARK: - 扩大按钮点击区域
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extension UIButton {
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/// 设置此属性即可扩大响应范围, 分别对应上左下右
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/// 优势：与Auto-Layout无缝配合
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/// 劣势：View Debugger 查看不到增加的响应区域有多大，
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private static var ExtendEdgeInsetsKey = "ExtendEdgeInsetsKey"
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var extendEdgeInsets: UIEdgeInsets {
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get {
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return objc_getAssociatedObject(self, &UIButton.ExtendEdgeInsetsKey) as? UIEdgeInsets ?? UIEdgeInsets.zero
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}
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set {
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objc_setAssociatedObject(self, &UIButton.ExtendEdgeInsetsKey, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
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}
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}
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override open func point(inside point: CGPoint, with event: UIEvent?) -> Bool {
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if UIEdgeInsetsEqualToEdgeInsets(extendEdgeInsets, .zero) || !self.isEnabled || self.isHidden || self.alpha < 0.01 {
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return super.point(inside: point, with: event)
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}
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let newRect = extendRect(bounds, extendEdgeInsets)
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return newRect.contains(point)
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}
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private func extendRect(_ rect: CGRect, _ edgeInsets: UIEdgeInsets) -> CGRect {
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let x = rect.minX - edgeInsets.left
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let y = rect.minY - edgeInsets.top
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let w = rect.width + edgeInsets.left + edgeInsets.right
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let h = rect.height + edgeInsets.top + edgeInsets.bottom
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return CGRect(x: x, y: y, width: w, height: h)
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}
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}
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