swift3 - Swift 3 中 `setImageWith(_:placeholderImage:usingActivityIndicatorStyle:)` 的使用不明确

Question

这段代码在 Swift 2.3 中运行良好，但是当我升级到 Swift 3.0 时，编译器提示使用不明确。

imgProfilePhoto?.setImageWith((URL(string: profileurl)), placeholderImage: UIImage(named: "PatientDefaultProfilePic"), usingActivityIndicatorStyle:UIActivityIndicatorViewStyle.gray)

Answer 1

swift 4

import SDWebImage
extension UIImageView {

@objc func setImageWithIndicator(urlStr: String?, placeholder: UIImage) {
    guard let _ = urlStr, let url = URL(string: urlStr!) else {
        image = placeholder
        return
    }
    sd_setIndicatorStyle(.gray)
    sd_addActivityIndicator()
    sd_setImage(with: url, placeholderImage: placeholder, options: .refreshCached, completed: nil)
}}

swift 3

imageView.sd_setImage(with: URL(string: ""), placeholderImage: UIImage(named: ""))
imageView.setShowActivityIndicator(true)
imageView.setIndicatorStyle(.gray)