Core Data结构修改后，在AppStore中更新升级crash的问题.

问题描述：

在苹果的错误收集中有这么一个问题：

使用的xmpp框架，在调整为适应ios5的版本后出现一个导致程序crash问题。但是原来的xmpp代码没有改变，那么问题在哪呢？

报错如下：

view plain

1. BUG监听报告:
2. 手机型号:iPhoneOS,版本: 4.3
3. 程序名称:xxx,版本：1.3
4. 用户:xxx
5. 2011-11-1316:17:31.506 [11747:307]***Terminatingappduetouncaughtexception'NSInternalInconsistencyException',reason:'ThisNSPersistentStoreCoordinatorhasnopersistentstores.Itcannotperformasaveoperation.'
6. ***Callstackatfirstthrow:
7. (
8. 0CoreFoundation0x344aaed3__exceptionPreprocess+114
9. 1libobjc.A.dylib0x33975811objc_exception_throw+24
10. 2CoreData0x338f29c1-[NSPersistentStoreCoordinatorexecuteRequest:withContext:error:]+196
11. 3CoreData0x3389253d-[NSManagedObjectContextsave:]+700
12. 4 0x00045145-[XMPPCapabilitiesCoreDataStoragesetCapabilities:forHash:algorithm:]+444
13. 5 0x00042121-[XMPPCapabilitiesxmppStream:willSendPresence:]+232
14. 6 0x0003ca57-[XMPPStreamsendElement:withTag:]+342
15. 7 0x0003c8f5-[XMPPStreamsendElement:]+28
16. 8 0x0004592f-[iPhoneXMPPgoOnline]+54

解决办法：
在stackoverflow找到解决办法：

http://stackoverflow.com/questions/1091228/i-keep-on-getting-save-operation-failure-after-any-change-on-my-xcode-data-mod

需要修改coredata的persistentstorecoordinator的代理实现方法，添加options，使得当coredata数据模型发生变化时，自动更该合并变化。

代码如下：

view plain

1. -(NSPersistentStoreCoordinator*)persistentStoreCoordinator{
3. if(persistentStoreCoordinator!=nil){
4. returnpersistentStoreCoordinator;
5. }
7. NSURL*storeUrl=[NSURLfileURLWithPath:[[selfapplicationDocumentsDirectory]stringByAppendingPathComponent:@"database.sqlite"]];
9. NSError*error=nil;
10. NSDictionary*options=[NSDictionarydictionaryWithObjectsAndKeys:
11. [NSNumbernumberWithBool:YES],NSMigratePersistentStoresAutomaticallyOption,
12. [NSNumbernumberWithBool:YES],NSInferMappingModelAutomaticallyOption,nil];
13. persistentStoreCoordinator=[[NSPersistentStoreCoordinatoralloc]initWithManagedObjectModel:[selfmanagedObjectModel]];
14. if(![persistentStoreCoordinatoraddPersistentStoreWithType:NSSQLiteStoreTypeconfiguration:nilURL:storeUrloptions:optionserror:&error]){
15. //Handleerror
16. }
18. returnpersistentStoreCoordinator;
19. }

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问题描述：

在苹果的错误收集中有这么一个问题：

使用的xmpp框架，在调整为适应ios5的版本后出现一个导致程序crash问题。但是原来的xmpp代码没有改变，那么问题在哪呢？

报错如下：

view plain

1. BUG监听报告:
2. 手机型号:iPhoneOS,版本: 4.3
3. 程序名称:xxx,版本：1.3
4. 用户:xxx
5. 2011-11-1316:17:31.506 [11747:307]***Terminatingappduetouncaughtexception'NSInternalInconsistencyException',reason:'ThisNSPersistentStoreCoordinatorhasnopersistentstores.Itcannotperformasaveoperation.'
6. ***Callstackatfirstthrow:
7. (
8. 0CoreFoundation0x344aaed3__exceptionPreprocess+114
9. 1libobjc.A.dylib0x33975811objc_exception_throw+24
10. 2CoreData0x338f29c1-[NSPersistentStoreCoordinatorexecuteRequest:withContext:error:]+196
11. 3CoreData0x3389253d-[NSManagedObjectContextsave:]+700
12. 4 0x00045145-[XMPPCapabilitiesCoreDataStoragesetCapabilities:forHash:algorithm:]+444
13. 5 0x00042121-[XMPPCapabilitiesxmppStream:willSendPresence:]+232
14. 6 0x0003ca57-[XMPPStreamsendElement:withTag:]+342
15. 7 0x0003c8f5-[XMPPStreamsendElement:]+28
16. 8 0x0004592f-[iPhoneXMPPgoOnline]+54

解决办法：
在stackoverflow找到解决办法：

http://stackoverflow.com/questions/1091228/i-keep-on-getting-save-operation-failure-after-any-change-on-my-xcode-data-mod

需要修改coredata的persistentstorecoordinator的代理实现方法，添加options，使得当coredata数据模型发生变化时，自动更该合并变化。

代码如下：

view plain

1. -(NSPersistentStoreCoordinator*)persistentStoreCoordinator{
3. if(persistentStoreCoordinator!=nil){
4. returnpersistentStoreCoordinator;
5. }
7. NSURL*storeUrl=[NSURLfileURLWithPath:[[selfapplicationDocumentsDirectory]stringByAppendingPathComponent:@"database.sqlite"]];
9. NSError*error=nil;
10. NSDictionary*options=[NSDictionarydictionaryWithObjectsAndKeys:
11. [NSNumbernumberWithBool:YES],NSMigratePersistentStoresAutomaticallyOption,
12. [NSNumbernumberWithBool:YES],NSInferMappingModelAutomaticallyOption,nil];
13. persistentStoreCoordinator=[[NSPersistentStoreCoordinatoralloc]initWithManagedObjectModel:[selfmanagedObjectModel]];
14. if(![persistentStoreCoordinatoraddPersistentStoreWithType:NSSQLiteStoreTypeconfiguration:nilURL:storeUrloptions:optionserror:&error]){
15. //Handleerror
16. }
18. returnpersistentStoreCoordinator;
19. }

问题描述：

在苹果的错误收集中有这么一个问题：

使用的xmpp框架，在调整为适应ios5的版本后出现一个导致程序crash问题。但是原来的xmpp代码没有改变，那么问题在哪呢？

报错如下：

view plain

1. BUG监听报告:
2. 手机型号:iPhoneOS,版本: 4.3
3. 程序名称:xxx,版本：1.3
4. 用户:xxx
5. 2011-11-1316:17:31.506 [11747:307]***Terminatingappduetouncaughtexception'NSInternalInconsistencyException',reason:'ThisNSPersistentStoreCoordinatorhasnopersistentstores.Itcannotperformasaveoperation.'
6. ***Callstackatfirstthrow:
7. (
8. 0CoreFoundation0x344aaed3__exceptionPreprocess+114
9. 1libobjc.A.dylib0x33975811objc_exception_throw+24
10. 2CoreData0x338f29c1-[NSPersistentStoreCoordinatorexecuteRequest:withContext:error:]+196
11. 3CoreData0x3389253d-[NSManagedObjectContextsave:]+700
12. 4 0x00045145-[XMPPCapabilitiesCoreDataStoragesetCapabilities:forHash:algorithm:]+444
13. 5 0x00042121-[XMPPCapabilitiesxmppStream:willSendPresence:]+232
14. 6 0x0003ca57-[XMPPStreamsendElement:withTag:]+342
15. 7 0x0003c8f5-[XMPPStreamsendElement:]+28
16. 8 0x0004592f-[iPhoneXMPPgoOnline]+54

解决办法：
在stackoverflow找到解决办法：
http://stackoverflow.com/questions/1091228/i-keep-on-getting-save-operation-failure-after-any-change-on-my-xcode-data-mod

需要修改coredata的persistentstorecoordinator的代理实现方法，添加options，使得当coredata数据模型发生变化时，自动更该合并变化。

代码如下：

view plain

1. -(NSPersistentStoreCoordinator*)persistentStoreCoordinator{
3. if(persistentStoreCoordinator!=nil){
4. returnpersistentStoreCoordinator;
5. }
7. NSURL*storeUrl=[NSURLfileURLWithPath:[[selfapplicationDocumentsDirectory]stringByAppendingPathComponent:@"database.sqlite"]];
9. NSError*error=nil;
10. NSDictionary*options=[NSDictionarydictionaryWithObjectsAndKeys:
11. [NSNumbernumberWithBool:YES],NSMigratePersistentStoresAutomaticallyOption,
12. [NSNumbernumberWithBool:YES],NSInferMappingModelAutomaticallyOption,nil];
13. persistentStoreCoordinator=[[NSPersistentStoreCoordinatoralloc]initWithManagedObjectModel:[selfmanagedObjectModel]];
14. if(![persistentStoreCoordinatoraddPersistentStoreWithType:NSSQLiteStoreTypeconfiguration:nilURL:storeUrloptions:optionserror:&error]){
15. //Handleerror
16. }
18. returnpersistentStoreCoordinator;
19. }