我的托管对象有2个双字段:"纬度","经度".我需要获取具有特定坐标的所有对象
此代码不起作用,fetchedObjects count = 0
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"latitude == %f AND longitude == %f", coordinate.latitude, coordinate.longitude];
但是这段代码工作正常,fetchedObjects count = 3:
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"latitude == 53.012667 AND longitude == 36.113000"];