paiai_ios/PaiAi/PaiaiUIKit/Reusable/UIKit/CustomUIKit/FFToastView.swift

//
//  FFToastView.swift
//  PaiAi
//
//  Created by mac on 16/7/21.
//  Copyright © 2016年 FFIB. All rights reserved.
//

import UIKit

class FFToastView: UIView {

    //文字
    var text: String = "" {
        didSet {
            label.text = text
            label.numberOfLines = 0
            label.lineBreakMode = .byWordWrapping
            label.textAlignment = .center
            label.sizeToFit()
        }
    }

    //字体
    var textFont = UIFont.systemFont(ofSize: 14)
    var textColor = UIColor.white

    //转菊花等待指示
    lazy var activityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: .whiteLarge)

    //    与父view的centerX距离
    var centerXPadding: CGFloat = 0

    //    与父view的centerX比例
    var centerXMultiplier: CGFloat = 1

    //    --
    var centerYPadding: CGFloat = 0
    var centerYMultiplier: CGFloat = 1
    //    中间文字上下左右间距
    var labelEdgeInsets = UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10) {
        didSet {
            if !UIEdgeInsetsEqualToEdgeInsets(labelEdgeInsets, oldValue) {
                self.setNeedsUpdateConstraints()
            }
        }
    }
    //    边界圆角

    var viewCornerRadius: CGFloat = 5 {
        didSet {
            self.layer.masksToBounds = true
            self.layer.cornerRadius = viewCornerRadius
        }
    }
    fileprivate var showing = false

    //文字toast
    func showToast(inView superview: UIView, duration: TimeInterval) {
        showing = true
        self.superview?.isUserInteractionEnabled = true
//        if label.superview == self {
            label.removeFromSuperview()
//        }
        self.addToSuperView(superview, duration: duration, haveImage: true)
        self.addSubview(label)
        activityIndicatorView.removeFromSuperview()
        addLabelConstraints()
    }

    func showImageToast(inView superview: UIView, duration: TimeInterval) {
        showing = true
        self.superview?.isUserInteractionEnabled = true
        label.removeFromSuperview()
        imageView.removeFromSuperview()
        self.addToSuperView(superview, duration: duration)
//        if label.superview != self {
            self.addSubview(label)
            self.addSubview(imageView)
            activityIndicatorView.removeFromSuperview()
            addImageViewConstraints()
//        }

    }

    //菊花toast
    func showLoadingToast(inView superview: UIView, blockSuperView: Bool) {
        showing = true
        self.superview?.isUserInteractionEnabled = true
        label.removeFromSuperview()
        self.addAcitvityIndicatorAndAddConstraints()
        activityIndicatorView.startAnimating()

        if blockSuperView {
            superview.isUserInteractionEnabled = false
        }
        self.addToSuperView(superview, duration: 0)
    }
    func hideLoadingToast() {
        showing = false
        activityIndicatorView.stopAnimating()
        activityIndicatorView.removeFromSuperview()
        self.dismiss()
    }

    func addToSuperView(_ superview: UIView, duration: TimeInterval, haveImage: Bool = false) {
        self.removeFromSuperview()
        superview.addSubview(self)
        self.layer.removeAllAnimations()
        self.alpha = 1
        // constrains to superview
//        self.useAutoLayout()
        self.constraintCenterX = NSLayoutConstraint(item: self, attribute: .centerX, relatedBy: .equal, toItem: superview, attribute: .centerX, multiplier: centerXMultiplier, constant: centerXPadding)
//        self.constraintCenterX!.active()
        self.constraintCenterY = NSLayoutConstraint(item: self, attribute: .centerY, relatedBy: .equal, toItem: superview, attribute: .centerY, multiplier: centerYMultiplier, constant: centerYPadding)
//        self.constraintCenterY!.active()
        if self.bounds.width == 0 {
            self.superview?.layoutIfNeeded()
        }
        self.layoutIfNeeded()
        if duration > 0 {
            self.perform(#selector(FFToastView.dismiss), with: nil, afterDelay: duration)
        }
    }

    @objc func dismiss() {
        showing = false
        UIView.animate(withDuration: 0.2, animations: {
            self.alpha = 0
        }, completion: { (_) in
            self.superview?.isUserInteractionEnabled = true
            if !self.showing {
                self.removeFromSuperview()
            }
            self.alpha = 1
        })
    }

    @discardableResult
    class func showToast(inView superview: UIView, withText text: String) -> FFToastView {
        defaultInstance.text = text
        defaultInstance.showToast(inView: superview, duration: 2)
        return defaultInstance
    }

    @discardableResult
    class func showToastAndTime(inView superview: UIView, withText text: String, withDuration duration: TimeInterval) -> FFToastView {
        defaultInstance.text = text
        defaultInstance.showToast(inView: superview, duration: duration)
        return defaultInstance
    }

    @discardableResult
    class func showImageToast(inView superview: UIView, withText text: String, withImage image: String) -> FFToastView {
        defaultInstance.text = text
        defaultInstance.imageView.image = UIImage(named: image)
        defaultInstance.showImageToast(inView: superview, duration: 2)
        return defaultInstance
    }

    class func hideLoadingToast() {
        defaultInstance.hideLoadingToast()
    }
    @discardableResult
    class func showLoadingToast(inView superview: UIView, blockSuperView block: Bool) -> FFToastView {
        defaultInstance.showLoadingToast(inView: superview, blockSuperView : block)
        return defaultInstance
    }

    // MARK: - -private--
    static fileprivate let defaultInstance = FFToastView(frame: CGRect.zero)
    fileprivate let label = UILabel()
    fileprivate let imageView = UIImageView()
    fileprivate var constraintCenterX: NSLayoutConstraint?
    fileprivate var constraintCenterY: NSLayoutConstraint?
    fileprivate var innerConstraints: [NSLayoutConstraint] = []

    fileprivate func applyDefaultSetting() {
        self.backgroundColor = UIColor(white: 0, alpha: 0.8)
        label.textColor = self.textColor
        label.font = self.textFont

        self.viewCornerRadius = 5
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        self.applyDefaultSetting()
    }

    override init(frame: CGRect) {
        super.init(frame: frame)
        self.applyDefaultSetting()
    }

    override func didMoveToSuperview() {
        if superview == nil {
            self.constraintCenterX = nil
            self.constraintCenterY = nil
        }
    }

    func addImageViewConstraints() {
        self.removeConstraints(constraints)
        if imageView.superview == self && label.superview == self {
            let rect = NSString(string: text).boundingRect(with: CGSize(width: kScreenWidth - 50, height: 10000), options: .usesLineFragmentOrigin, attributes: [NSAttributedStringKey.font: UIFont.systemFont(ofSize: 15)], context: nil)

            let size = NSString(string: text).size(withAttributes: [NSAttributedStringKey.font: UIFont.systemFont(ofSize: 14)])
            let width = size.width < kScreenWidth - 50 ? size.width : kScreenWidth - 50
            imageView.frame = CGRect(x: 34, y: 18, width: 60, height: 60)
            label.frame = CGRect(x: 10, y: 90, width: width, height: rect.height)
            innerConstraints.removeAll(keepingCapacity: true)
//            NSLayoutConstraint(item: self, attribute: .width, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1, constant: width + 20).active = true
//            NSLayoutConstraint(item: self, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1, constant: 114 + rect.height).active = true
        }

    }

    func addLabelConstraints() {
        imageView.removeFromSuperview()
        self.removeConstraints(constraints)
        let rect = NSString(string: text).boundingRect(with: CGSize(width: kScreenWidth - 50, height: 10000), options: .usesLineFragmentOrigin, attributes: [NSAttributedStringKey.font: UIFont.systemFont(ofSize: 15)], context: nil)

        let size = NSString(string: text).size(withAttributes: [NSAttributedStringKey.font: UIFont.systemFont(ofSize: 14)])
        let width = size.width < kScreenWidth - 50 ? size.width : kScreenWidth - 50

        label.frame = CGRect(x: 10, y: 10, width: width, height: rect.height)

//        NSLayoutConstraint(item: self, attribute: .width, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1, constant: width + 20).active()
//        NSLayoutConstraint(item: self, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1, constant: rect.height + 20).active()

    }

    fileprivate func addAcitvityIndicatorAndAddConstraints() {
        imageView.removeFromSuperview()
        removeConstraints(constraints)
        if activityIndicatorView.superview != self {
            self.addSubview(activityIndicatorView)
//            activityIndicatorView.useAutoLayout()
            innerConstraints.removeAll()
//            NSLayoutConstraint.constraints(withVisualFormat: "H:|-30-[Indicator]-30-|", options: [], metrics: nil, views: ["Indicator": activityIndicatorView]).autolayoutInstall()
//            NSLayoutConstraint.constraints(withVisualFormat: "V:|-30-[Indicator]-30-|", options: [], metrics: nil, views: ["Indicator": activityIndicatorView]).autolayoutInstall()
        }

    }
}