Crash on iOS 17 due to UIGraphicsBeginImageContextWithOptions(0,0,...) in UIImage.tinted(with:) extension

[jcuervo-almato]

> Crash on iOS 17 due to UIGraphicsBeginImageContextWithOptions(0,0,...) in UIImage.tinted(with:) extension

Hello PaceCloud SDK team,

I’m encountering a crash on iOS 17 (and possibly iOS 16.4+) caused by the tinted(with:) extension in UIImage+Extension.swift. When UIImage.size is (0,0), the call to UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale) fails, resulting in this error:

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', 
reason: 'UIGraphicsBeginImageContext() failed to allocate CGBitmapContext: size={0, 0}, ...'

In my use case, the Connected Fueling drawer occasionally tries to tint an icon that inadvertently has a zero-size image, triggering the crash. It appears iOS 17 is more strict about UIGraphicsBeginImageContextWithOptions being called with (0,0) sizes.

---

Proposed Solution

I replaced the UIGraphicsBeginImageContextWithOptions usage with UIGraphicsImageRenderer, along with a guard statement checking that the image’s width and height are non-zero. Here is my revised extension:

extension UIImage {
    func tinted(with color: UIColor) -> UIImage {
        // Prevent a crash by skipping the operation if size is zero.
        guard self.size.width > 0, self.size.height > 0 else {
            return self
        }

        let renderer = UIGraphicsImageRenderer(
            size: self.size,
            format: UIGraphicsImageRendererFormat.default()
        )

        return renderer.image { context in
            let cgContext = context.cgContext
            cgContext.translateBy(x: 0, y: self.size.height)
            cgContext.scaleBy(x: 1.0, y: -1.0)

            color.setFill()

            if let cgImage = self.cgImage {
                cgContext.clip(to: CGRect(origin: .zero, size: self.size), mask: cgImage)
            }
            cgContext.fill(CGRect(origin: .zero, size: self.size))
        }
    }
}

• Key changes:
  • A simple guard self.size.width > 0, self.size.height > 0 else { return self } avoids trying to tint an image of zero size.
  • Use UIGraphicsImageRenderer to avoid UIGraphicsBeginImageContextWithOptions(0,0,...) in the first place.

This workaround solves the crash for me on iOS 17 while retaining existing behavior for images with valid sizes.

---

Request / Context

1. Context: The crash surfaced in a scenario where the PaceCloud UI tries to render a tinted icon that may occasionally have a zero size.
2. iOS 17: Apple now appears to throw an assertion instead of silently ignoring (0,0) contexts.
3. Suggested Next Steps: Integrate a check for zero-size images and/or switch from UIGraphicsBeginImageContextWithOptions to UIGraphicsImageRenderer in the official SDK code.

Thank you for reviewing this. Let me know if you need any more details. I hope this proposed fix can be incorporated (or an equivalent safeguard put in place) to handle zero-sized images gracefully on iOS 17+.

Best regards,
Jean Cuervo - Almato Iberia