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关于这个话题有什么新闻吗？

我正在使用Cordova 3.4.0和FileTransfer插件,当我下载文件时,UI开始滞后特别是在iOS设备上,其中加载gif一直被冻结

是否可以顺利下载文件的替代插件？

0.4.3 (Apr 17,2014)

… CB-5175: [ios] CDVFileTransfer asynchronous download (Fixes #24)
…

不幸的是,这个版本通过不调用成功或失败的回调来完全打破文件传输下载.有关安装最后一个有效的构建的说明,请参阅https://issues.apache.org/jira/browse/CB-6720?focusedCommentId=14008776&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14008776.

我手动修补CDVFileTransfer.m以包含最新版本的后台线程代码.在下载方法中,您需要替换

[delegate.connection start];

同

// Downloads can take time
// sending this to a new thread calling the download_async method
dispatch_async(
               dispatch_get_global_queue(disPATCH_QUEUE_PRIORITY_DEFAULT,(unsigned long)NULL),^(void) { [delegate.connection start];}

到目前为止,这对我来说是可靠的,但显然你是在科尔多瓦发布正式修复之前自己做的.

@Override
public void drop(DragAndDropEvent event) {
    WrapperTransferable transfrable = (WrapperTransferable) event.getTransferable();
    WrapperTargetDetails details = (WrapperTargetDetails) event.getTargetDetails();
    System.out.println("transfrable " + transfrable.getClass().getCanonicalName());
    System.out.println("transfrable.getDraggedComponent() " + transfrable.getDraggedComponent().getClass().getCanonicalName());
    if (transfrable.getDraggedComponent() instanceof Button) {
        // Calculate the drag coordinate difference
        int xChange = details.getMouseEvent().getClientX() - transfrable.getMouseDownEvent().getClientX();
        int yChange = details.getMouseEvent().getClientY() - transfrable.getMouseDownEvent().getClientY();

        // Move the component in the absolute layout
        AbsoluteLayout.ComponentPosition componentPosition = processModelLayout.getPosition(transfrable.getSourceComponent());
        componentPosition.setLeftValue(componentPosition.getLeftValue() + xChange);
        componentPosition.setTopValue(componentPosition.getTopValue() + yChange);

        ElementModelLayout elementModelLayout = (ElementModelLayout) ((Button) transfrable.getDraggedComponent()).getParent();
        TaskModel elementModel = elementModelLayout.getTaskModel();
        elementModel.setX(componentPosition.getLeftValue());
        elementModel.setY(componentPosition.getTopValue());
        processModel.getTaskModels().put(elementModel.getId(),elementModel);
        transitionManager.setValue(processModel.getTaskModels(),processModel.getTransitionModels());
        setTaskActive(elementModel);
    }
}

@Override
public void drop(final DragAndDropEvent event) {
    if (validate(event)) {
        final Html5File[] files = ((WrapperTransferable) event.getTransferable()).getFiles();
        // selected software module at the time of file drop is
        // considered for upload

        artifactUploadState.getSelectedBaseSwModuleId().ifPresent(selectedSwId -> {
            // reset the flag
            hasDirectory = false;
            final SoftwareModule softwareModule = softwareModuleManagement.get(selectedSwId)
                    .orElse(null);
            for (final Html5File file : files) {
                processFile(file,softwareModule);
            }
            if (artifactUploadState.getNumberOfFileUploadsExpected().get() > 0) {
                processBtn.setEnabled(false);
            } else {
                // If the upload is not started,it signifies all
                // dropped files as either duplicate or directory.so
                // display message accordingly
                displayCompositeMessage();
            }
        });
    }
}

private boolean isFilesDropped(final DragAndDropEvent event) {
    if (event.getTransferable() instanceof WrapperTransferable) {
        final Html5File[] files = ((WrapperTransferable) event.getTransferable()).getFiles();
        return files != null;
    }
    return false;
}