ios - swift3使用try建立SQLite，抛出“Errors thrown from here are not handle”

Question

按照stephencelis/SQLite.swift的文档，使用try后一直报错，是什么问题？

import SQLite

class CreateSQLiteDB{
    let Sqlite3Path = NSSearchPathForDirectoriesInDomains(
        .documentDirectory, .userDomainMask, true
        ).first! + "/db.sqlite3"
    
    func createSQlite() {
        let db = try Connection(Sqlite3Path)
        let users = Table("users")
        let id = Expression<Int64>("id")
        let name = Expression<String?>("name")
        let email = Expression<String>("email")
        
        try db.run(users.create { t in
            t.column(id, primaryKey: true)
            t.column(name)
            t.column(email, unique: true)
        })
        
    }
}

Answer 1

先看一下抛出的异常吧，对症下药。
swift 中，try-catch 的用法：

do {
  try expression
} catch let error {
  print(error)
}

Errors thrown from here are not handle 翻译过来就是:这里抛出的异常并未处理

此外，还有 try? 及 try! 。建议稍微去了解一下。