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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Convert UIImage to NSData or NSData to UIImage

To save as data: My code executes just fine, I just get errors when an image is referenced and of course, no images are displayed. Converted to Swift 3 and worked To save: Resources Gist of the Swift Playground is available here Share this: Yogendra Singh 6.

Still gives me the same error unfortunately. There is some variability on how each approach is tested. Dedicated to the Swift programming language released by Apple.

Become a Redditor and subscribe to one of thousands of communities. Password confirmation Password confirmation should match the password. Caveats There are more comprehensive approaches out there. The first step was looking at the different ways you can convert a UIImage into Data. There is more work to be done on why the compression ratio has an inconsistent impact, my guess is this is a result to caching within the test. Fill out the form below and reset your password:. Hardik Thakkar 7, 1 46 Submit a new post.


Use of this site constitutes acceptance of our User Agreement and Privacy Policy. Testing Scenarios For my scenarios it was important to understand how memory is impacted based on the following: How do I convert imageData i. Now in Swift 4.

See the gist of the details for each approach. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

NSHipster has a great article with details here. When the loop has completed the proper number of iterations the memory is again sampled and the delta is recorded.

These compression ratios where then run using 1, 2, 14, 20, and 50 executions.

Unfortunately some of our below listed tools require Java plugin: Helped uiimwge a lot. Munkh-Erdene Zorigbold 51 1 2. Welcome to Reddit, the front page of the internet. I am sure there is a ton of optimizations that could be made to bring these numbers down. Ask Tech Query Post Blogs. I settled on the following three approaches.

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Number of executions, i.

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

Either enter Content Or Record. More info in the Swift Wiki. Testing Each Approach I test each of the above mentioned approaches using the template outlined below. Email Please enter a valid email. If you want to follow along you can create your own Swift Playground using this gist. We have detected you are using Google Chrome and might be unable to use the Java plugin from this browser.


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Log in or sign up in seconds. That’s of type CIImage. Post as a guest Name.

General Swift Discussion irc. How often do you convert a UIImage into a Data object? Image quality is an important aspect of my projects, so the tests where performed using the compression ratios of 1.

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. You have cnovert the maximum number of characters allowed for a comment without sign in.

I test each of the above mentioned approaches using the template outlined below.