https://github.com/rudifa/imagecropper

More image cropping in an UIKit iOS app
https://github.com/rudifa/imagecropper

Last synced: 24 days ago
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More image cropping in an UIKit iOS app

• Host: GitHub
• URL: https://github.com/rudifa/imagecropper
• Owner: rudifa
• Created: 2018-08-03T15:17:12.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2018-08-03T15:17:17.000Z (over 6 years ago)
• Last Synced: 2024-10-06T01:41:22.455Z (about 1 month ago)
• Language: Swift
• Homepage:
• Size: 132 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
#  <#Title#>

based on video tutorial ZOOM AND PAN LARGE IMAGES – UISCROLLVIEW by Brian Advent

problems:

- saves a cropped image, but this does not seem to correspond to the zoomed-in view

- after a second tap (after image was saved) the scroll seems to be wrogly initialized

On `master 82d0a39` we have

- initial default image

- load image button

- loaded image looks as if in `scaleAspectFit` mode (it is fully visible), however the code does `imageView.contentMode = .center` and then rescales `scrollView.zoomScale = minScale`

- saved image is a cutout

- on second loadImage it is displaced - like the offset is wrong

- 3rd and subsequent loads are like second

- what is the centering effect of `scaleAspectFit`?

```

UIView.ContentMode.scaleToFill     = 0  fills, aspect ratio not preserved, default

UIView.ContentMode.scaleAspectFit  = 1  aspect ratio preserved, may not fill

UIView.ContentMode.scaleAspectFill = 2  aspect ratio preserved, may clip

UIView.ContentMode.center          = 4  center the content in the view’s bounds, keeping the proportions the same.

```

ba06825: at last we have same behavior for scroll view btw initial image and loaded image.

tentative_4: cropping looks plausible, but it is problematic for a large image (4288,2848)

semms to be related to 

croppedImage scrollView.size=(375.0, 375.0) scrollView.offset=(1628.5, 2006.5) zoomScale=1.0

2018-07-28 22:50:44.747878+0200 ImageCropper[41456:23353561] imageBlockSetCreate:829: *** buffer height mismatch: rect:{0,1920,4288,768}  size:{4288,2848}

Look at /GitHub/iOS/-aatish-r-ImageCropper - it uses a different approach to cropping 

2018_07_31

- cropping still not correctly aligned?

- make sure that cropped view has same aspect ratio as the scroll view!