Hi all, has anyone had success getting CIFilters to work in the latest playgrounds ? It keeps throwing me a “Failed to convert UIImage to PNG”. You can store a UIImage (or an NSImage on Mac) as raw data. This can be useful if you’d like to save it in Core Data. Here’s how you convert a. Hi all,to convert uiimage to nsdataobjective cnsdata *data = uiimagepngrepresentation();swiftlet imagedata: nsdata.

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NSHipster has a great article with details here. User Name Please enter user name. Password Password should have minimum 6 characters Please enter password.

At the top of the method a memory sample is taken The helper method for converting a UIImage to a Data object is called in a loop. Unable to start Java!! Email Please enter a valid email. After doing this I started seeing memory spikes and leaks appear which got me thinking on how I can better profile different options for performing this conversion. You’ll need to convert it to another image type, one that playground can handle, to get a UIImage for example that you can see.

Look at exclamation point “! My code executes just fine, I just get errors when an image is referenced and of course, no images are displayed. Caveats There are more comprehensive approaches out there.

See the gist of the details for each approach. I will do so after this comment. Welcome to Reddit, the front page of the internet. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of uikmage website is subject to these policies.


ios – Convert UIImage to NSData and convert back to UIImage in Swift? – Stack Overflow

Resources Gist of the Swift Playground is available here Share this: When the loop has completed the proper number of iterations the memory is again sampled and the delta is recorded. We have detected you are using Google Chrome and might be unable to use the Java plugin from this browser. Munkh-Erdene Zorigbold 51 1 2. Ivan Sinigaglia 4 uimage. To save as data: You have exceeded the maximum number of characters allowed for a comment without sign in.

Thanks for the help. UI Design and UX. Manage Company All at 0 Cost I don’t mind messing around with the filters in ho project file, but I’m trying to reproduce an effect by stacking multiple filters and it would just be waaaay faster to do it in playground as opposed uiiimage building a project on my phone every time.

Firefox and Microsoft Internet Explorer are recommended browsers for websites using java applets. Now in Swift 4.

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. If you want to follow along you can create your own Swift Playground using this gist. Nerd Digest Users Other Sites. Do they do public bug tracking?


Although the ImageIO strategy was better in a single execution scenario I question if the proper handling of image orientation would reduce or eliminate any of your memory savings. Helped me a lot. Sign up or log in Sign up using Google. These compression ratios where then run using 1, 2, 14, 20, and 50 executions. Still gives me covert same error unfortunately.

Sign up using Facebook. Want to add to the discussion? More info in the Swift Wiki. These frequencies demonstrate when image caching and Autorelease Pool strategies start to impact results. There are more comprehensive approaches out there.

Convert UIImage to NSData or NSData to UIImage

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Convert UIImage to NSData or NSData to UIImage

Have you filed a bug with Apple? Please, check the FAQs before submitting. Test Results Below is the result broken down by iteration. I test each of the above mentioned approaches using the template uiimagr below. The first step was looking at the different ways you can convert a UIImage into Data. Desktop Recording Tool All at 0 Cost