TypeScript image-source.fromFile函数代码示例

OStack程序员社区-中国程序员成长平台 › 门户 › 编程› TypeScript›TypeScript教程

原作者: [db:作者] 来自: [db:来源] 收藏邀请

本文整理汇总了TypeScript中tns-core-modules/image-source.fromFile函数的典型用法代码示例。如果您正苦于以下问题：TypeScript fromFile函数的具体用法？TypeScript fromFile怎么用？TypeScript fromFile使用的例子？那么恭喜您, 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fromFile函数的10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，您的评价将有助于我们的系统推荐出更棒的TypeScript代码示例。

示例1: test_DummyTestForSnippetOnly

export function test_DummyTestForSnippetOnly() {
    // >> image-cache-request-images
    var cache = new imageCacheModule.Cache();
    cache.placeholder = imageSource.fromFile(fs.path.join(__dirname, "res/no-image.png"));
    cache.maxRequests = 5;
    
    // Enable download while not scrolling
    cache.enableDownload();
    
    var imgSouce: imageSource.ImageSource;
    var url = "https://github.com/NativeScript.png";
    // Try to read the image from the cache
    var image = cache.get(url);
    if (image) {
        // If present -- use it.
        imgSouce = imageSource.fromNativeSource(image);
    }
    else {
        // If not present -- request its download.
        cache.push({
            key: url,
            url: url,
            completed: (image: any, key: string) => {
                if (url === key) {
                    imgSouce = imageSource.fromNativeSource(image);
                }
            }
        });
    }

    // Disable download while scrolling
    cache.disableDownload();
    // << image-cache-request-images
}

开发者ID:NathanWalker，项目名称:NativeScript，代码行数:34，代码来源:image-cache-tests.ts

示例2: testNativeFields

export function testNativeFields() {
    const img = imageSource.fromFile(imagePath);
    if (app.android) {
        TKUnit.assert(img.android != null, "Image.android not updated.");
    } else if (app.ios) {
        TKUnit.assert(img.ios != null, "Image.ios not updated.");
    }
}

开发者ID:NathanWalker，项目名称:NativeScript，代码行数:8，代码来源:image-source-tests.ts

示例3: testSaveToFile_WithQuality

export function testSaveToFile_WithQuality() {
    const img = imageSource.fromFile(imagePath);
    const folder = fs.knownFolders.documents();
    const path = fs.path.join(folder.path, "test.png");
    const saved = img.saveToFile(path, "png", 70);
    TKUnit.assert(saved, "Image not saved to file");
    TKUnit.assert(fs.File.exists(path), "Image not saved to file");
}

开发者ID:NathanWalker，项目名称:NativeScript，代码行数:8，代码来源:image-source-tests.ts

示例4: testBase64Encode_PNG_WithQuality

export function testBase64Encode_PNG_WithQuality() {
    const img = imageSource.fromFile(smallImagePath);
    let base64String = img.toBase64String("png", 80);
    base64String = base64String.substr(0, expectedPngStart.length);
    TKUnit.assertEqual(
        base64String,
        expectedPngStart,
        "Base 64 encoded PNG");
}

开发者ID:NathanWalker，项目名称:NativeScript，代码行数:9，代码来源:image-source-tests.ts

示例5: testSaveToFile

export function testSaveToFile() {
    // >> imagesource-save-to
    const img = imageSource.fromFile(imagePath);
    const folder = fs.knownFolders.documents();
    const path = fs.path.join(folder.path, "test.png");
    const saved = img.saveToFile(path, "png");
    // << imagesource-save-to
    TKUnit.assert(saved, "Image not saved to file");
    TKUnit.assert(fs.File.exists(path), "Image not saved to file");
}

开发者ID:NathanWalker，项目名称:NativeScript，代码行数:10，代码来源:image-source-tests.ts

示例6: testBase64Encode_PNG

export function testBase64Encode_PNG() {
    const img = imageSource.fromFile(smallImagePath);
    let result = img.toBase64String("png");

    result = result.substr(0, expectedPngStart.length);
    TKUnit.assertEqual(
        result,
        expectedPngStart,
        "Base 64 encoded PNG");
}

开发者ID:triniwiz，项目名称:NativeScript，代码行数:10，代码来源:image-source-tests.ts

示例7: testBase64Encode_JPEG

export function testBase64Encode_JPEG() {
    const img = imageSource.fromFile(smallImagePath);

    let base64String = img.toBase64String("jpeg");
    base64String = base64String.substr(0, expectedJpegStart.length);

    TKUnit.assertEqual(
        base64String,
        expectedJpegStart,
        "Base 64 encoded JPEG");
}

开发者ID:NathanWalker，项目名称:NativeScript，代码行数:11，代码来源:image-source-tests.ts

示例8: testBase64Encode_JPEG

export function testBase64Encode_JPEG() {
    var img = imageSource.fromFile(smallImagePath);

    var result = img.toBase64String("jpeg");
    result = result.substr(0, expectedJpegStart.length);

    TKUnit.assertEqual(
        result,
        expectedJpegStart,
        "Base 64 encoded JPEG");
}

开发者ID:sitefinitysteve，项目名称:NativeScript，代码行数:11，代码来源:image-source-tests.ts

示例9: testBase64Encode_PNG

export function testBase64Encode_PNG() {
    // >> imagesource-to-base-string
    const img = imageSource.fromFile(smallImagePath);
    let base64String = img.toBase64String("png");
    // << imagesource-to-base-string

    base64String = base64String.substr(0, expectedPngStart.length);
    TKUnit.assertEqual(
        base64String,
        expectedPngStart,
        "Base 64 encoded PNG");
}

开发者ID:NathanWalker，项目名称:NativeScript，代码行数:12，代码来源:image-source-tests.ts

示例10: testFromFile

export function testFromFile() {
    // >> imagesource-load-local
    const folder = fs.knownFolders.documents();
    const path = fs.path.join(folder.path, "test.png");
    const img = imageSource.fromFile(path);
    // << imagesource-load-local

    TKUnit.assert(img.height > 0, "image.fromResource failed");

    // remove the image from the file system
    const file = folder.getFile("test.png");
    file.remove();
    TKUnit.assert(!fs.File.exists(path), "test.png not removed");
}

开发者ID:NathanWalker，项目名称:NativeScript，代码行数:14，代码来源:image-source-tests.ts

注：本文中的tns-core-modules/image-source.fromFile函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。