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

import UIKit
import AlamofireImage
extension UIImageView {
    @discardableResult
    func setImageWithNullableURL(_ url: String, placeholderImage: UIImage?) -> UIImage {
        guard let URL = URL(string: url) else {
            self.image = placeholderImage
            return placeholderImage ?? UIImage()
        }
        self.af_setImage(withURL: URL, placeholderImage: placeholderImage)
        return self.image ?? UIImage()
    }

    func setImageWithNullableURL(_ url: String, placeholderImage: UIImage?, progress: @escaping ImageDownloader.ProgressHandler, completion: @escaping () -> Void) {
        guard let URL = URL(string: url) else {
            return
        }
        self.af_setImage(withURL: URL, placeholderImage: placeholderImage, progress: { (pro) in
            progress(pro)
        }) { (response) in
            completion()
        }
        self.af_setImage(withURL: URL, placeholderImage: placeholderImage)
    }
}