我有一个显示UICollectionViewController的iPhone应用程序。CollectionView包含将UILabel作为subview的单元格。考虑以下测试代码:-(UICollectionViewCell*)collectionView:(UICollectionView*)collectionViewcellForItemAtIndexPath:(NSIndexPath*)indexPath{staticNSString*CellIdentifier=@"Cell";UICollectionViewCell*cell=[collectionViewdequeue

场景：现有环境已经使用Java8在运行业务，安装Jenkins后启动报错。原因：因为Jenkins-2.396依赖于Java11版本才能启动。解决方法：yum安装Java11yuminstalljava-11-openjdk-develjava-11-openjdk或者二进制安装java11修改Jenkins启动文件vim/lib/systemd/system/jenkins.service添加如下内容Environment="JAVA_HOME=/usr/lib/jvm/java-11"重启Jenkinssystemctldaemon-reloadsystemctlrestartjenkin