public static func fetch(in context: NSManagedObjectContext, configurationBlock: (NSFetchRequest) -> () = { _ in }) -> [Self] {
let request = NSFetchRequest(entityName: Self.entityName)
configurationBlock(request)
return try! context.fetch(request)
}
context.fetch(request), 'fetch' function has error. Thread 24: EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)
js160
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DESCRIPTION
I have an App use iCloud to save data.
The App had a CoreData ManagedObject 'Product', 'Product' Object had an attribute name 'count' and it is a Double Type.
I need to synchronises 'count' property across multiple devices.
for example:
I have a devices A、B.
A device set 'Product.count' = 100.
B device set 'Product.count' = 50.
I hope the 'Product.count' == 150 that results.
how to synchronises the 'Product.count' == 150 for multiple devices.
If I have more devices in future, How to get the latest 'Product.count' that it is correct result.