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Crash in ImageBuilder

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#33 1 comment 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
35/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
swift
Domain
computer-graphics, mobile-dev

Research direction

Start with ImageBuilder and the addTile(x:y:image:) method shown in the issue. Inspect when UIImage.cgImage is nil and determine the appropriate behavior for that case, then reproduce the intermittent crash and verify that image tiling no longer force-unwraps a missing image representation.

Written by the indexing model from the issue text.

Description

    func addTile(x: Int, y: Int, image: UIImage) {
        context?.draw(image.cgImage!, in: CGRect(origin: CGPoint(x: CGFloat(x) * tileSize.width, y: CGFloat(Int(imageSize.height / tileSize.height) - y - 1) * tileSize.height), size: tileSize))
    }

The force unwrap crashes sometimes

Dominant language
Swift
Stars
232
Forks
51
No merged PRs in 30d

Getting set up

First steps

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

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