realm 添加字段报错

前几天在给Realm数据库的一个表加字段的时候,控制台报了一个错.Migration is required due to the following errors

网上Google,然后看了一下官方文档.

//在Appdelegate加上这个代码段就行了.

// Inside your application(application:didFinishLaunchingWithOptions:)

let config = Realm.Configuration(

    // Set the new schema version. This must be greater than the previously used

    // version (if you've never set a schema version before, the version is 0).

    schemaVersion: 1,

    // Set the block which will be called automatically when opening a Realm with

    // a schema version lower than the one set above

    migrationBlock: { migration, oldSchemaVersion in

        // We haven’t migrated anything yet, so oldSchemaVersion == 0

        if (oldSchemaVersion < 1) {

            // Nothing to do!

            // Realm will automatically detect new properties and removed properties

            // And will update the schema on disk automatically

        }

    })

// Tell Realm to use this new configuration object for the default Realm

Realm.Configuration.defaultConfiguration = config

// Now that we've told Realm how to handle the schema change, opening the file

// will automatically perform the migration

let realm = try! Realm()

可能碰到其他需求,可以参考文档.

：https://realm.io/docs/swift/latest/#migrations