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SDWebImageでカスタムヘッダをつけてsd_setImageする

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ヘッダをつけて画像をダウンロードしたいときってあるよなァ!

環境

SDWebImage5.8.0以上

方法

sd_setImage(with:placeholderImage:options:context)を利用する

sd_setImage(with: url,
            placeholderImage: nil,
            context: [.downloadRequestModifier: SDWebImageDownloaderRequestModifier(headers: ["Foo": "Bar"])])

あるいはclosureを使って

sd_setImage(with: url,
            placeholderImage: nil,
            context: [.downloadRequestModifier: SDWebImageDownloaderRequestModifier {
                var request = $0
                request.setValue("Bar", forHTTPHeaderField: "Foo")
                return request
}])

また、全てのリクエストに共通のヘッダをつけたい場合は

SDWebImageDownloader.shared.setValue("Bar", forHTTPHeaderField: "Foo")

でカスタムヘッダを設定できる

参考元

https://github.com/SDWebImage/SDWebImage/pull/2990
https://stackoverflow.com/questions/16266462/sdwebimage-and-setting-custom-http-headers

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