xcode 如何彻底清除核心数据模型？
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How to completely clear out a Core Data model?
提问by max_
How I could completely clear out EVERYTHING in a Core Data model i.e remove all objects for all entities?
我如何才能完全清除核心数据模型中的所有内容，即删除所有实体的所有对象？
I will be using the code to clear out the saved history in a the model.
我将使用代码清除模型中保存的历史记录。
回答by Mak083
Here is another way to do...
这是另一种方法...
NSManagedObjectContext *context = [appDelegate managedObjectContext];
NSFetchRequest * allMovies = [[NSFetchRequest alloc] init];
[allMovies setEntity:[NSEntityDescription entityForName:@"Movies" inManagedObjectContext:context]];
[allMovies setIncludesPropertyValues:NO]; //only fetch the managedObjectID
NSError * error = nil;
NSArray * movies = [context executeFetchRequest:allMovies error:&error];
//error handling goes here
for (NSManagedObject * movie in movies) {
[context deleteObject:movie];
}
NSError *saveError = nil;
[context save:&saveError];
It will clear all the objects.
它将清除所有对象。
回答by Jamie Chapman
Delete the .sqlite DB Core Data creates (it's probably stored on your /Documents directory) and get your app to re-create it.
删除 .sqlite DB Core Data 创建的（它可能存储在您的 /Documents 目录中）并让您的应用程序重新创建它。
回答by Mike A
Here is a good answer to this question.
这是这个问题的一个很好的答案。
Delete/Reset all entries in Core Data?
Then just make sure to re-create the store.
然后只需确保重新创建商店。
