本文整理汇总了TypeScript中tns-core-modules/image-source.fromAsset函数的典型用法代码示例。如果您正苦于以下问题：TypeScript fromAsset函数的具体用法？TypeScript fromAsset怎么用？TypeScript fromAsset使用的例子？那么, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了fromAsset函数的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的TypeScript代码示例。
示例1: testFromAssetWithExactScaling
export function testFromAssetWithExactScaling(done) {
let asset = new imageAssetModule.ImageAsset(splashscreenPath);
let scaleWidth = 10;
let scaleHeight = 11;
asset.options = {
width: scaleWidth,
height: scaleHeight,
keepAspectRatio: false,
autoScaleFactor: false
};
imageSource.fromAsset(asset).then((source) => {
TKUnit.assertEqual(source.width, scaleWidth);
TKUnit.assertEqual(source.height, scaleHeight);
const targetFilename = `splashscreenTemp.png`;
const tempPath = fs.knownFolders.temp().path;
const localFullPath = fs.path.join(tempPath, targetFilename);
const fullImageSaved = source.saveToFile(localFullPath, "png");
if (fullImageSaved) {
let sourceImage = new imageSource.ImageSource();
sourceImage.fromFile(localFullPath).then(() => {
TKUnit.assertEqual(sourceImage.width, scaleWidth);
TKUnit.assertEqual(sourceImage.height, scaleHeight);
done();
});
} else {
done(`Error saving photo to local temp folder: ${localFullPath}`);
}
}, (error) => {
done(error);
});
}示例2: testFromAssetFileNotFound
export function testFromAssetFileNotFound(done) {
let asset = new imageAssetModule.ImageAsset("invalidFile.png");
asset.options = {
width: 0,
height: 0,
keepAspectRatio: true
};
let img = imageSource.fromAsset(asset).then((source) => {
done("Should not resolve with invalid file name.");
}, (error) => {
TKUnit.assertNotNull(error);
done();
});
}示例3: testFromAssetWithScalingAndDefaultAspectRatio
export function testFromAssetWithScalingAndDefaultAspectRatio(done) {
let asset = new imageAssetModule.ImageAsset(splashscreenPath);
let scaleWidth = 10;
let scaleHeight = 11;
asset.options.width = scaleWidth;
asset.options.height = scaleHeight;
let img = imageSource.fromAsset(asset).then((source) => {
TKUnit.assertEqual(source.width, 18);
TKUnit.assertEqual(source.height, scaleHeight);
done();
}, (error) => {
done(error);
});
}示例4: testFromAssetSimple
export function testFromAssetSimple(done) {
let asset = new imageAssetModule.ImageAsset(splashscreenPath);
asset.options = {
width: 0,
height: 0,
keepAspectRatio: true
};
let img = imageSource.fromAsset(asset).then((source) => {
TKUnit.assertEqual(source.width, splashscreenWidth);
TKUnit.assertEqual(source.height, splashscreenHeight);
done();
}, (error) => {
done(error);
});
}示例5: testFromAssetWithBiggerScaling
export function testFromAssetWithBiggerScaling(done) {
let asset = new imageAssetModule.ImageAsset(splashscreenPath);
let scaleWidth = 600;
let scaleHeight = 600;
asset.options = {
width: scaleWidth,
height: scaleHeight,
keepAspectRatio: false
};
let img = imageSource.fromAsset(asset).then((source) => {
TKUnit.assertEqual(source.width, scaleWidth);
TKUnit.assertEqual(source.height, scaleHeight);
done();
}, (error) => {
done(error);
});
}