小编Neu*_*oXc的帖子

我有一个动画GIF,我想在React Native中使用.我把它嵌入我的应用程序并播放,但我希望能够根据事件暂停/播放GIF.

目前有没有办法在React Native中执行此操作？我知道我可以通过使用MP4来做到这一点,但我想尽可能保留GIF,因为它允许我使用透明度.

我有一个Angular应用程序,目前通过Webpack构建到一个大型包中,包含单个文件中的所有依赖项和应用程序代码.我试图将代码分成两个包,一个包含所有依赖项,另一个包含所有应用程序代码.

我有以下webpack.config.js:

var webpack = require('webpack');
var path = require('path');

var definePlugin = new webpack.DefinePlugin({
    'process.env': {
        NODE_ENV: `"${process.env.NODE_ENV}"`
    }
});

var SRC = path.resolve(__dirname, 'src/main/client');
var APP = path.resolve(SRC, 'app/index.js');
var DEST = path.resolve(__dirname, 'target/webapp/dist');

module.exports = {
    entry: {
        vendor: [
            'angular',
            'angular-animate',
            'moment',
            'angular-moment',
            'angular-translate',
            'angular-ui-bootstrap',
            'angular-ui-router',
            'lodash'
        ],
        app: APP
    },
    plugins: [
        new webpack.ProvidePlugin({
            _: 'lodash',
            angular: 'angular',
            angularMoment: 'angular-moment',
            angularTranslate: 'angular-translate',
            moment: 'moment',
            ngAnimate: 'angular-animate',
            uibootstrap: 'angular-ui-bootstrap',
            uirouter: 'angular-ui-router'
        }),
        new webpack.optimize.CommonsChunkPlugin('vendor', 'vendor.bundle.js'),
        definePlugin …

在编写测试时,我希望能够在请求中注入连接,以便我可以将整个测试用例包装在事务中(即使测试用例中有多个请求).

我尝试使用BeforeMiddleware我可以在我的测试用例中链接的插入连接,如下所示:

pub type DatabaseConnection = PooledConnection<ConnectionManager<PgConnection>>;

pub struct DatabaseOverride {
    conn: DatabaseConnection,
}

impl BeforeMiddleware for DatabaseOverride {
    fn before(&self, req: &mut Request) -> IronResult<()> {
        req.extensions_mut().entry::<DatabaseOverride>().or_insert(self.conn);
        Ok(())
    }
}

但是,我在尝试执行此操作时遇到编译错误:

error: the trait bound `std::rc::Rc<diesel::pg::connection::raw::RawConnection>: std::marker::Sync` is not satisfied [E0277]
impl BeforeMiddleware for DatabaseOverride {
     ^~~~~~~~~~~~~~~~
help: run `rustc --explain E0277` to see a detailed explanation
note: `std::rc::Rc<diesel::pg::connection::raw::RawConnection>` cannot be shared between threads safely
note: required because it appears within the type `diesel::pg::PgConnection`
note: required because …