new/CommonFrame/CusView/Virgil_SelectedImageView.swift

//
//  SelectedImageView.swift
//  选择图片，上传到七牛，并加载到页面（UIScrollView）
//
//  Created by Virgil on 2018/6/14.
//  Copyright © 2018年 Virgil. All rights reserved.
//

import UIKit

class Virgil_SelectedImageView: UIView, UIImagePickerControllerDelegate, UINavigationControllerDelegate, MTImagePickerControllerDelegate {

    @IBOutlet weak var scrollView: UIScrollView!

    var vcSelf: UIViewController!
    private var arrBtns = [UIButton]()
    var maxCount = 3
    var arrImageUrls = [String]()
    ///maxCount 最大图片数 arrDefaultImageUrs：默认图片，无为nil  vc:当前Controller
    func initView(maxCount: Int, arrDefaultImageUrs: [String]?, vc: UIViewController) {
        self.maxCount = maxCount
        vcSelf = vc
        loadImageButtons()
        arrImageUrls.removeAll()
        if arrDefaultImageUrs != nil {
            for url in arrDefaultImageUrs! {
                arrImageUrls.append(url)
            }
        }
        scrollView.setSizeWidth(width: self.width())
        reLoadImages()
    }
    ///初始化按钮
    func loadImageButtons() {
        scrollView.removeAll()
        let size = scrollView.frame.height
        var left: CGFloat = 0
        for i in 0 ..< (maxCount + 1) {
            let btn = UIButton(frame: CGRect(x: left, y: 0, width: size, height: size))
            scrollView.addSubview(btn)
            btn.tag = i
            left += size + 10
            btn.isHidden = true
            arrBtns.append(btn)
            btn.addTarget(self, action: #selector(btnClick), for: .touchUpInside)
        }
        scrollView.contentSize.width = left
    }
    var btnClickCurrnet = 0
    @objc func btnClick(btn: UIButton) {
        btnClickCurrnet = btn.tag
        //添加按钮
        if btn.tag == arrImageUrls.count {
            if self.arrImageUrls.count >= maxCount {
                CommonUntils.alert(message: "最多只能上传\(maxCount)张照片!")
                return
            }
            CommonUntils.AlertView(controller: vcSelf, title: nil, message: nil, buttons: ["拍照上传", "从相册上传"], style: .actionSheet) {[weak self] (index, _) in
                let ipc = UIImagePickerController()
                if index == 0 {
                    ipc.sourceType = .camera
                    ipc.delegate = self!
                    //默认图片
                    // 视频 ipc.mediaTypes = ["public.movie"]   //UIImagePickerControllerMediaURL 取
                    ipc.allowsEditing = false
                    self!.vcSelf.present(ipc, animated: true, completion: nil)
                } else {
                    self!.selectImageForPhoto()
                    //ipc.sourceType = .photoLibrary
                }

            }
        } else  //其他图片按钮
        {

            CommonUntils.AlertView(controller: vcSelf, title: nil, message: nil, buttons: ["删除"], style: .actionSheet) {[weak self] (_, _) in
                self!.arrImageUrls.remove(at: self!.btnClickCurrnet)
                self!.reLoadImages()
            }
        }
    }

    func selectImageForPhoto() {
        var mediaTypes = [MTImagePickerMediaType]()
        mediaTypes.append(MTImagePickerMediaType.Photo)
        let source = MTImagePickerSource.ALAsset

        let vc = MTImagePickerController.instance
        vc.mediaTypes = mediaTypes
        vc.source = source
        vc.imagePickerDelegate = self
        let defaultShowCameraRoll = true
        vc.maxCount = maxCount - self.arrImageUrls.count
        vc.defaultShowCameraRoll = defaultShowCameraRoll
        UIApplication.shared.setStatusBarStyle(.default, animated: false)
        vcSelf.present(vc, animated: true, completion: nil)

    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) {

        vcSelf.dismiss(animated: true) {[weak self] in
            var imgTemp: UIImage? = info[UIImagePickerController.InfoKey.originalImage] as? UIImage
            if picker.allowsEditing {
                imgTemp = info[UIImagePickerController.InfoKey.editedImage] as? UIImage
            }
            if imgTemp != nil {
                self!.uploadImage(img: imgTemp!)
            } else {
                SVProgressHUD.showError(withStatus: "图片选择失败，请重试")
            }
        }
    }

    @available(iOS 8.0, *)
    func imagePickerController(picker: MTImagePickerController, didFinishPickingWithPhotosModels models: [MTImagePickerPhotosModel]) {
        UIApplication.shared.setStatusBarStyle(.lightContent, animated: false)
        //self.dataSource = models
        // self.tableView.reloadData()

        for i in 0 ..< models.count {
            uploadImage(img: models[i].getPreviewImage()!)

        }

       // loadCurrentImage();
    }

    func imagePickerController(picker: MTImagePickerController, didFinishPickingWithAssetsModels models: [MTImagePickerAssetsModel]) {
        UIApplication.shared.setStatusBarStyle(.lightContent, animated: false)
        for i in 0 ..< models.count {
            uploadImage(img: models[i].getPreviewImage()!)

        }
       // loadCurrentImage();
    }

    func uploadImage(img: UIImage) {
        SVProgressHUD.show()
        let uploadFile = QiNiuUploadFile()
        uploadFile.uploadFile(img: img) {[weak self] (type, str) in
            SVProgressHUD.dismiss()
            if type == 1 {
                let userLoginUrl = RequestURL.qiNiuImageUrl + str
                self!.arrImageUrls.append(userLoginUrl)
                self!.reLoadImages()
            } else {
                SVProgressHUD.showError(withStatus: "上传失败")
            }
        }
    }
    ///加载图片
    func reLoadImages() {
        for i in 0 ..< arrBtns.count {
            if i < arrImageUrls.count {
                arrBtns[i].loadBackgroudImage(imgUrl: arrImageUrls[i], defaultImage: "bn-tjzp")
                arrBtns[i].isHidden = false
                arrBtns[i].setCornerRadius(size: 8)
            } else if i == arrImageUrls.count {
                arrBtns[i].setBackgroudImage(name: "bn-tjzp")
                arrBtns[i].isHidden = false
            } else {
                arrBtns[i].isHidden = true
            }
        }
        if arrImageUrls.count > 0 {
            scrollView.contentSize.width = arrBtns[arrImageUrls.count].right() + 10
        } else {
            scrollView.contentSize.width = scrollView.width()
        }
        if scrollView.contentSize.width > scrollView.width() {
            scrollView.contentOffset.x = scrollView.contentSize.width - scrollView.width()
        }
    }
}