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                [TOC] ## 概述 ## 示例 ### 設置寫入格式 ``` QImageWriter writer; writer.setFormat("png"); // 同writer.setFormat("PNG"); ``` ### 寫入信息 ``` QImageWriter writer(fileName); if (writer.supportsOption(QImageIOHandler::Description)) writer.setText("Author", "Mr Wang"); ``` 不同的圖像格式支持不同的選項。調用此函數,可以確定當前格式是否支持一個特定的選項 ### 顯示支持的類型和 MIME ``` QList<QByteArray> imageFormats = QImageWriter::supportedImageFormats(); QList<QByteArray> mimeTypes = QImageWriter::supportedMimeTypes(); ``` ``` // imageFormats : ("bmp", "cur", "dds", "icns", "ico", "jp2", "jpeg", "jpg", "pbm", "pgm", "png", "ppm", "tif", "tiff", "wbmp", "webp", "xbm", "xpm") // mimeTypes : ("", "image/bmp", "image/jp2", "image/jpeg", "image/png", "image/tiff", "image/vnd.microsoft.icon", "image/vnd.wap.wbmp", "image/webp", "image/x-dds", "image/x-icns", "image/x-portable-bitmap", "image/x-portable-graymap", "image/x-portable-pixmap", "image/x-xbitmap", "image/x-xpixmap") ``` ### 寫入圖片 ``` // 源圖像 QImage image(":/Images/logo"); // 目標圖像 QImageWriter writer("AuthorLogo.jpeg", "jpeg"); if (writer.supportsOption(QImageIOHandler::Description)) { // 設置描述信息 writer.setText("Author", "Mr Wang"); writer.setText("Description", "Qter"); } // 壓縮質量 writer.setQuality(100); if (writer.canWrite()) { // 寫入圖片至文件AuthorLogo.jpeg writer.write(image); } else { // 獲取錯誤信息 QImageWriter::ImageWriterError error = writer.error(); QString strError = writer.errorString(); qDebug() << "Last Error : " << strError; } ```
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