![]() ![]() To set outputPath make sure to add option for rotation too (if no rotation is needed, just set it to 0). If null, resized image will be stored in cache folder. On iOS, rotation is limited (and rounded) to multiples of 90 degrees. Rotation to apply to the image, in degrees, for android. ![]() Path of image file, or a base64 encoded image string prefixed with 'data:image/imagetype' where imagetype is jpeg or png.Ĭan be either JPEG, PNG or WEBP (android only).Ī number between 0 and 100. The URI can be used directly as the source of an component. The promise resolves with an object containing: path, uri, name and size of the new file. API promise createResizedImage(path, maxWidth, maxHeight, compressFormat, quality, rotation = 0, outputPath) It uses the module to resize a photo from the Camera Roll. ![]() then ( ( response ) => ) Sample appĪ basic, sample app is available in the example folder. createResizedImage ( imageUri, newWidth, newHeight, compressFormat, quality, rotation, outputPath ). Import ImageResizer from 'react-native-image-resizer' ImageResizer. Rnpm install on latest versions of React Native, you may have an error during the Gradle build on Android ( 圎xception: Multiple dex files define Landroid/support/v7/appcompat/R$anim). How to scale an image using ScaleType attribu. □ React Native >= 0.29.2 and = 0.28 and You must now read the image uri from property uri of the returned object. ⚠️ Heads up, breaking change! If you're upgrading react-native-image-resizer to version 1.0.0, please note that the response of createResizedImage changed. React-native link react-native-image-resizer Npm install -save react-native-image-resizer The time profiling was done on a physical device with Xcode Instruments’ Time Profiler tool measuring the time it takes for CA::Transaction::Commit() to complete after initiating the drawing of 1000 images.A React Native module that can create scaled versions of local images (also supports the assets library on iOS). The following data is collected by time profiling drawing 1000 images all at the same time on screen. However, drawing an image with “Preserve Vector Data” enabled is much slower when the image is stretched stretched SVG images have a slightly better performance than stretched PDF images. There’s no measurable runtime performance difference between “Preserve Vector Data” turned on and off when the image is drawn at intrinsic size. Note: the sizes above are built against a specific device type, so App Thinning is taken into account. Image TypeĪssets.car Size (no vector data preserved) There are 7702 imagesets in total at the time of the size analysis. The following bundle sizes are collected by using the asset catalog compiling tool directly on generated PDF and SVG imagesets from Fluent icons repo. However, there is a significant application bundle size increase when “Preserve Vector Data” option is enabled PDFs have a bigger size increase than SVGs. When vector data is disabled, the bundle size difference between PDF and SVG graphics is very trivial. Stretching an image is not supported or necessary in most scenarios such as displayed within a button however, in the rare cases when an image needs to fill a variable size such as the entire screen, streching an image is indeed necessary. At runtime, if the image is drawn at a different size from the intrinsic image size, the vector data will be used so that the image does not appear blurry. This option is useful if the image is expected to be stretched. When a single scale PDF or SVG image with “Preserve Vector Data” option enabled is used for an imageset, XCode adds the image vector data to the app bundle at build time. At runtime, the application loads the PNG image from the app bundle, so the runtime behavior is the same as if PNG images are provided for the imageset. When a single scale PDF or SVG image with “Preserve Vector Data” option disabled is used for an imageset, Xcode generates corresponding or PNG images depending on the build target at build time. There’s no significant difference in size or performance between PDF and SVG images when “Preserve Vector Data” option is disabled, but SVG images are easier to share with Android and web. The recommended image file format for iOS images is SVG images with “Preserve Vector Data” option disabled in Xcode. Image assets officially support multiple file formats including PNG, PDF and SVG. ![]()
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