NSPredicate 多级过滤器

Question

I am trying to search on NSMutableArray with two levels drill down with custom objects, I tried using SELF and ANY but no luck.

I have an NSMutableArray say contentArray Content Array

contentArray
    {
     OBJECTA,
     OBJECTA
    }

Which has custom objects (OBJECTA), objectA in turn has a custom object called Customer

OBJECTA:

@interface OBJECTA : NSObject
{
    @property (strong,nonatomic)   Customer * selectedCustomer;

}
@end

CUSTOMER:

@interface Customer : NSObject

   @property(strong,nonatomic) NSString* Customer_Name;

@end

Now how I will be able to search contentArray for Customer_Name using NSPredicate?

Answer 1

尝试使用此代码

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"selectedCustomer.Customer_Name CONTAINS[c] %@", your_name_here];
NSArray *filteredArray = [contentArray filteredArrayUsingPredicate:predicate];

Answer 2

如果你想匹配确切的名字，可以这样尝试

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"selectedCustomer.Customer_Name LIKE '%@'", searchName];

如果你想检查名称是否包含

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"selectedCustomer.Customer_Name CONTAINS[cd] %@", searchName];

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