我收到此错误:
2015-12-29 03:13:41.603 n-back project[21345:474175] CoreData: error: -addPersistentStoreWithType:SQLite configuration:(null) URL:file:///Users/Nathan/Library/Developer/CoreSimulator/Devices/EC2C60E2-9FC8-40D7-B16F-15960AA6B42A/data/Containers/Data/Application/8F8132B0-76E9-491E-BA1B-27A5D78CE7D0/Documents/data.sqlite options:{
NSMigratePersistentStoresAutomaticallyOption = 1;
} ... returned error Error Domain=NSCocoaErrorDomain Code=134110 "(null)" UserInfo={NSUnderlyingException=Couldn't create mapping policy for class named (BTRPolicy)} with userInfo dictionary {
NSUnderlyingException = "Couldn't create mapping policy for class named (BTRPolicy)";
}
2015-12-29 03:13:41.608 n-back project[21345:474175] Unresolved error Error Domain=YOUR_ERROR_DOMAIN Code=9999 "Failed to initialize the application's saved data" UserInfo={NSLocalizedDescription=Failed to initialize the application's saved data, NSUnderlyingError=0x7b14eef0 {Error Domain=NSCocoaErrorDomain Code=134110 "(null)" UserInfo={NSUnderlyingException=Couldn't create mapping policy for class named (BTRPolicy)}}, NSLocalizedFailureReason=There was an error creating or loading the application's saved data.}, [NSLocalizedDescription: Failed to initialize the application's saved data, NSUnderlyingError: Error Domain=NSCocoaErrorDomain Code=134110 "(null)" UserInfo={NSUnderlyingException=Couldn't create mapping policy for class named (BTRPolicy)}, NSLocalizedFailureReason: There was an error creating or loading the application's saved data.]
在我看来，找到类BTRPolicy存在问题。它存在于文件BTRPolicy中，名称为BTRPolicy。它已正确分类，并在实用程序窗格的自定义策略选择中被称为“BTRPolicy”。有任何想法吗？
最佳答案
万一其他人遇到此问题，并且与您的google搜索相匹配:我想通了，出于某种原因，自定义策略现在必须以模块名称作为前缀。
关于ios - 持久存储在大量迁移中找不到迁移策略类，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/34507210/