117 lines
4.5 KiB
Swift
117 lines
4.5 KiB
Swift
//
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// ESTabBarItemBadgeView.swift
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//
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// Created by Vincent Li on 2017/2/8.
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// Copyright (c) 2013-2018 ESTabBarController (https://github.com/eggswift/ESTabBarController)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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import UIKit
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/*
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* ESTabBarItemBadgeView
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* 这个类定义了item中使用的badge视图样式，默认为ESTabBarItemBadgeView类对象。
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* 你可以设置ESTabBarItemContentView的badgeView属性为自定义的ESTabBarItemBadgeView子类，这样就可以轻松实现 自定义通知样式了。
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*/
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open class ESTabBarItemBadgeView: UIView {
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/// 默认颜色
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public static var defaultBadgeColor = UIColor(red: 255.0/255.0, green: 59.0/255.0, blue: 48.0/255.0, alpha: 1.0)
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/// Badge color
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open var badgeColor: UIColor? = defaultBadgeColor {
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didSet {
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imageView.backgroundColor = badgeColor
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}
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}
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/// Badge value, supprot nil, "", "1", "someText". Hidden when nil. Show Little dot style when "".
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open var badgeValue: String? {
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didSet {
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badgeLabel.text = badgeValue
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}
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}
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/// Image view
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open var imageView: UIImageView = {
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let imageView = UIImageView.init(frame: CGRect.zero)
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imageView.backgroundColor = .clear
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return imageView
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}()
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/// 显示badgeValue的Label
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open var badgeLabel: UILabel = {
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let badgeLabel = UILabel.init(frame: CGRect.zero)
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badgeLabel.backgroundColor = .clear
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badgeLabel.textColor = .white
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badgeLabel.font = UIFont.systemFont(ofSize: 13.0)
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badgeLabel.textAlignment = .center
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return badgeLabel
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}()
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/// Initializer
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public override init(frame: CGRect) {
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super.init(frame: frame)
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self.addSubview(imageView)
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self.addSubview(badgeLabel)
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self.imageView.backgroundColor = badgeColor
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}
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public required init?(coder aDecoder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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/*
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* 通过layoutSubviews()布局子视图，你可以通过重写此方法实现自定义布局。
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**/
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open override func layoutSubviews() {
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super.layoutSubviews()
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guard let badgeValue = badgeValue else {
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imageView.isHidden = true
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badgeLabel.isHidden = true
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return
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}
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imageView.isHidden = false
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badgeLabel.isHidden = false
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if badgeValue == "" {
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imageView.frame = CGRect.init(origin: CGPoint.init(x: (bounds.size.width - 8.0) / 2.0, y: (bounds.size.height - 8.0) / 2.0), size: CGSize.init(width: 8.0, height: 8.0))
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} else {
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imageView.frame = bounds
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}
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imageView.layer.cornerRadius = imageView.bounds.size.height / 2.0
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badgeLabel.sizeToFit()
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badgeLabel.center = imageView.center
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}
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/*
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* 通过此方法计算badge视图需要占用父视图的frame大小，通过重写此方法可以自定义badge视图的大小。
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* 如果你需要自定义badge视图在Content中的位置，可以设置Content的badgeOffset属性。
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*/
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open override func sizeThatFits(_ size: CGSize) -> CGSize {
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guard let _ = badgeValue else {
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return CGSize.init(width: 18.0, height: 18.0)
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}
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let textSize = badgeLabel.sizeThatFits(CGSize.init(width: CGFloat.greatestFiniteMagnitude, height: CGFloat.greatestFiniteMagnitude))
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return CGSize.init(width: max(18.0, textSize.width + 10.0), height: 18.0)
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}
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}
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