SDWebImage載入圖片的URL是同一個（如何處理）

直接code！

載入圖片時用的方法如下：

[self.imageView sd_setImageWithURL:[NSURL URLWithString:urlStr]];

載入不出來最新的圖片，改用下面的方法，去解決問題：

[self.imageView sd_setImageWithURL:[NSURL URLWithString:urlStr] placeholderImage:nil options:SDWebImageRefreshCached];

除了上面的修改之外，我們還需要在SDWebImage的內部，SDWebImageManager.m檔案中，大概180行左右吧，把之前的程式碼：

if (image && options & SDWebImageRefreshCached) {
    // force progressive off if image already cached but forced refreshing
    downloaderOptions &= ~SDWebImageDownloaderProgressiveDownload;
    // ignore image read from NSURLCache if image if cached but force refreshing
    downloaderOptions |= SDWebImageDownloaderIgnoreCachedResponse;
}

更換成如下：

if (image && options & SDWebImageRefreshCached) {
    // force progressive off if image already cached but forced refreshing
    downloaderOptions &= ~SDWebImageDownloaderProgressiveDownload;
替換下面
    // remove SDWebImageDownloaderUseNSURLCache flag
    downloaderOptions &= ~SDWebImageDownloaderUseNSURLCache;
替換上面
    // ignore image read from NSURLCache if image if cached but force refreshing
    downloaderOptions |= SDWebImageDownloaderIgnoreCachedResponse;
}

好久沒有寫更新了，以後要堅持啊！