CoreData: error: (522) I/O error for database at /Users/jiaguanglei/Library/Developer/CoreSimulator/Devices/03506F42-5847-4FF1-A222-3AE06B0990E0/data/Containers/Data/Application/6242F997-7787-44BF-AB8F-0A8F14BCC216/Library/Application Support/PPChat/XMPPRoster.sqlite. SQLite error code:522, 'not an error'
// 删除 App 后再次运行