无法使用Magical记录更新NSManagedObject

Question

我试图通过获取所有对象来使用魔法记录更新NSManagedObjects，然后使用for循环更改每个对象，并在保存上下文后没有更改

 NSArray * locationArray = [[NSArray alloc]initWithArray:[Locations findAllInContext:[NSManagedObjectContext contextForCurrentThread]]];
for(Locations * currentLocation in locationArray)
{
    currentLocation.name = @"Hello world";

}
[[NSManagedObjectContext contextForCurrentThread]saveToPersistentStoreAndWait];

Answer 1

您只需将代码放入MagicalRecord的保存块

即可

[MagicalRecord saveWithBlock:^(NSManagedObjectContext *localContext) {
    // This block runs in background thread
    NSArray * locationArray = [[NSArray alloc]initWithArray:[Locations findAllInContext:[NSManagedObjectContext contextForCurrentThread]]];
    for(Locations * currentLocation in locationArray){
        currentLocation.name = @"Hello world";
    }
} completion:^(BOOL success, NSError *error) {
    // This block runs in main thread
}];