Predicate 查询数组中的字典对象

NSString *firstName = @"Ben";

NSArray *array = @[ @{ @"lastName" : "Turner" },
                    @{ @"firstName" : @"Ben", @"lastName" : @"Ballard",

                       @"birthday", [NSDate dateWithString:@"1972-03-24 10:45:32 +0600"] }

		 ];

NSPredicate *predicate =
    [NSPredicate predicateWithFormat:@"firstName like %@", firstName];

NSArray *filteredArray = [array filteredArrayUsingPredicate:predicate];

NSLog(@"filteredArray: %@", filteredArray);
// Output:
// filteredArray ({birthday = 1972-03-24 10:45:32 +0600; \

                      firstName = Ben; lastName = Ballard;})