How can I resize images to prevent WidgetKit archival errors due to oversized pixel limits?

Below is a potential solution note that may help. WidgetKit archives a view’s rendered image as a bitmap and—in doing so—expects its backing image’s pixel dimensions (the underlying CGImage’s width × height) to be below a strict limit. In your case the error message shows an image of 1024×1024 (area 1,048,576) even though your resizing routine logs a final image under the limit; this indicates that the image you provide to the widget isn’t the one actually being archived. Here are a couple of things to try:

1. Ensure the resized image is what you supply to the timeline entry. Instead of passing a full‑resolution image to your widget view (which may be re‑rendered or scaled at archive time), do the resizing in your timeline provider when you download the image. For example:

SWIFTCopied
struct MyWidgetEntry: TimelineEntry {
    let date: Date
    // Keep the already resized image
    let image: UIImage
}

// In your timeline provider:
func getTimeline(in context: Context, completion: @escaping (Timeline<MyWidgetEntry>) -> Void) {
    downloadRemoteImage { fullImage in
        // Resize using your resizedForWidget(_:) extension:
        guard let resizedImage = fullImage?.resizedForWidget() else { return }
        let entry = MyWidgetEntry(date: Date(), image: resizedImage)
        let timeline = Timeline(entries: [entry], policy: .atEnd)
        completion(timeline)
    }
}

2. Double-check the underlying CGImage data. Even if your UIImage instance’s size (its .size property) appears correct, WidgetKit archives the pixel buffer. In your UIGraphicsImageRendererFormat you set the scale to 1, which should force the rendered bitmap to be the same as newSize; however, confirm that (a) this resized image is what’s used in the widget and (b) no additional scaling is introduced in the view (for example, by using .resizable() without an explicit frame that could trigger re‑rasterization). You might experiment with creating a new image via CGImage drawing (for example, by rendering into a CGBitmapContext) so that the pixel dimensions are absolutely limited.

3. Alternatively, consider applying view modifiers to constrain the display size of the image rather than pre‑resizing it. For instance, if you load the high‑resolution image with AsyncImage, call .resizable(), .scaledToFill() (or .scaledToFit()) and a fixed .frame(width:…, height:…) so that the widget snapshot’s backing image is drawn at a smaller logical size. This sometimes avoids the archival failure because the widget renderer “sees” an image no larger than the allowed maximum area.

In summary, the key is to ensure that the image data WidgetKit archives is already “downsampled” (or drawn into a fixed size) so that its underlying pixel dimensions do not exceed 718,080. Performing the resizing in your timeline provider (or otherwise pre‑processing the image into a new UIImage with its CGImage created at the target dimensions) is often the most reliable way.

Give one or both of these approaches a try, and make sure to verify (by logging the cgImage width/height) that the bitmap you eventually pass to the widget indeed meets the size constraints.