Class: NSMergePolicy
Overview
You use a merge policy object to resolve conflicts between the persistent store and in-memory versions of managed objects.
Instance Attribute Summary (collapse)
-
- mergeType
readonly
The merge type.
Instance Method Summary (collapse)
-
- initWithMergeType:
Returns a merge policy initialized with a given policy type.
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- resolveConflicts:error:
Resolves the conflicts in a given list.
Methods inherited from NSObject
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Constructor Details
This class inherits a constructor from NSObject
Dynamic Method Handling
This class handles dynamic methods through the method_missing method in the class NSObject
Instance Attribute Details
- (NSMergePolicyType) mergeType (readonly)
The merge type. (read-only)
Instance Method Details
- (Object) initWithMergeType(ty)
Returns a merge policy initialized with a given policy type. If you override this method in a subclass, you should invoke the superclass’s implementation with the merge policy that is closest to the behavior you want.This will make it easier to use the superclass’s implementation of resolveConflicts:error: and then customize the results.Due to the complexity of merging to-many relationships, this class is designed with the expectation that you call super as the base implementation.
- (Boolean) resolveConflicts(list, error:error)
Resolves the conflicts in a given list. If you override this method in a subclass, you should typically invoke the superclass’s implementation in addition to performing your own operations.