小编And*_*w H的帖子

对于以下代码,在下面两行之前的两个注释中,只有第一个有效.

NSManagedObject * Event = [NSEntityDescription insertNewObjectForEntityForName:str inManagedObjectContext:app.managedObjectContext]; 
//Work but strange
[Event setValue:[NSNumber numberWithInt:buf4[v+h]] forKey:value]; 
 //Error
Event.value= [NSNumber numberWithInt:buf4[v+h]]; 

第二次返回并出错

request for member 'value' in 'Event', which is of non-class type 'NSManagedObject*'