@nativescript/core/image-asset/index.ios.js

A JavaScript library providing an easy to use api for interacting with iOS and Android platform APIs.

import { ImageAssetBase, getRequestedImageSize } from './image-asset-common';
import { path as fsPath, knownFolders } from '../file-system';
import { queueGC } from '../utils';
export * from './image-asset-common';
export class ImageAsset extends ImageAssetBase {
    constructor(asset) {
        super();
        if (typeof asset === 'string') {
            if (asset.indexOf('~/') === 0) {
                asset = fsPath.join(knownFolders.currentApp().path, asset.replace('~/', ''));
            }
            this.nativeImage = UIImage.imageWithContentsOfFile(asset);
        }
        else if (asset instanceof UIImage) {
            this.nativeImage = asset;
        }
        else {
            this.ios = asset;
        }
    }
    // @ts-ignore
    get ios() {
        return this._ios;
    }
    set ios(value) {
        this._ios = value;
    }
    getImageAsync(callback) {
        if (!this.ios && !this.nativeImage) {
            callback(null, 'Asset cannot be found.');
        }
        const srcWidth = this.nativeImage ? this.nativeImage.size.width : this.ios.pixelWidth;
        const srcHeight = this.nativeImage ? this.nativeImage.size.height : this.ios.pixelHeight;
        const requestedSize = getRequestedImageSize({ width: srcWidth, height: srcHeight }, this.options);
        if (this.nativeImage) {
            callback(this.scaleImage(this.nativeImage, CGSizeMake(requestedSize.width, requestedSize.height)), null);
            queueGC();
            return;
        }
        const imageRequestOptions = PHImageRequestOptions.alloc().init();
        imageRequestOptions.deliveryMode = 1 /* PHImageRequestOptionsDeliveryMode.HighQualityFormat */;
        imageRequestOptions.networkAccessAllowed = true;
        PHImageManager.defaultManager().requestImageForAssetTargetSizeContentModeOptionsResultHandler(this.ios, requestedSize, 0 /* PHImageContentMode.AspectFit */, imageRequestOptions, (image, imageResultInfo) => {
            if (image) {
                callback(this.scaleImage(image, requestedSize), null);
            }
            else {
                callback(null, imageResultInfo.valueForKey(PHImageErrorKey));
            }
            queueGC();
        });
    }
    scaleImage(image, requestedSize) {
        return NativeScriptUtils.scaleImageWidthHeightScaleFactor(image, requestedSize.width, requestedSize.height, this.options?.autoScaleFactor === false ? 1.0 : 0.0);
    }
}
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