Question

我有一个json对象进入

{
"c_id": "261",
"customer_id": "178729",
"name": "Three, Test"
},
{
"c_id": "261",
"customer_id": "178727",
"name": "Two, Test"
},
{
"c_id": "261",
"customer_id": "178728",
"name": "Two, Test"
},
{
"c_id": "261",
"customer_id": "185186",
"name": "Valid, Another"
},
{
"c_id": "261",
"customer_id": "183889",
"name": "White, Betty"
}

但是当此代码处理

时

NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
        NSMutableArray *tempCustomers = [[NSMutableArray alloc] init];
        for (NSDictionary *dict in [json objectForKey:@"data"]) {
            NSLog(@"dict: %@", dict);
            NSLog(@"name: %@", [dict objectForKey:@"name"]);
            [tempCustomers addObject:dict];
        }

        self.customers = tempCustomers;
        NSLog(@"Customers: %@",customers);
        self.customerData = [self partitionObjects:[self customers] collationStringSelector:@selector(self)];
        NSLog(@"CustomerData: %@",customerData);

-(NSArray *)partitionObjects:(NSArray *)array collationStringSelector:(SEL)selector
{
    UILocalizedIndexedCollation *collation = [UILocalizedIndexedCollation currentCollation];
    NSInteger sectionCount = [[collation sectionTitles] count];
    NSMutableArray *unsortedSections = [NSMutableArray arrayWithCapacity:sectionCount];

    for (int i = 0; i < sectionCount; i++) {
        [unsortedSections addObject:[NSMutableArray array]];
    }

    for (id object in array) {
        NSInteger index = [collation sectionForObject:[object objectForKey:@"name"] collationStringSelector:selector];
        [[unsortedSections objectAtIndex:index] addObject:object];
    }

    NSMutableArray *sections = [NSMutableArray arrayWithCapacity:sectionCount];
    NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:YES];
    NSArray *sortDescriptors = [NSArray arrayWithObject:sortDescriptor];


    for (NSMutableArray *section in unsortedSections) {
        NSArray *sortedArray = [section sortedArrayUsingDescriptors:sortDescriptors];
        //NSLog(@"Sort: %@",sortedArray);
        //[sections addObject:[collation sortedArrayFromArray:section collationStringSelector:selector]];
        [sections addObject:sortedArray];
    }

    return sections;
}

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
    NSLog(@"Search Display Controller: %@", self.customerData);
    //NSString *predicateString = [NSString stringWithFormat:@"name CONTAINS[cd] '%@'",searchString];
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"name CONTAINS[cd] '%@'",searchString];
    self.filteredCustomers = [[self.customerData filteredArrayUsingPredicate:predicate] mutableCopy];
    NSLog(@"Filtered Customers %@", self.filteredCustomers);

    return YES;
}

显示

2012-03-26 14:15:21.885 MyApp[65799:15003] name: Two, Test
2012-03-26 14:15:21.885 MyApp[65799:15003] dict: {
    "c_id" = 261;
    "customer_id" = 178728;
    name = "Two, Test";
}
2012-03-26 14:15:21.885 MyApp[65799:15003] name: Two, Test
2012-03-26 14:15:21.885 MyApp[65799:15003] dict: {
    "c_id" = 261;
    "customer_id" = 185186;
    name = "Valid, Another";
}
2012-03-26 14:15:21.885 MyApp[65799:15003] name: Valid, Another
2012-03-26 14:15:21.886 MyApp[65799:15003] dict: {
    "c_id" = 261;
    "customer_id" = 183889;
    name = "White, Betty";
}
2012-03-26 14:15:21.886 MyApp[65799:15003] name: White, Betty
2012-03-27 08:35:24.764 MyApp[67330:fb03] Search Display Controller: (
        (
    ),
    (
                {
            "c_id" = 261;
            "customer_id" = 178664;
            name = "Test, My";
        },
                {
            "c_id" = 261;
            "customer_id" = 185182;
            name = "Test, valid";
        },
                {
            "c_id" = 261;
            "customer_id" = 178729;
            name = "Three, Test";
        },
                {
            "c_id" = 261;
            "customer_id" = 178727;
            name = "Two, Test";
        },
                {
            "c_id" = 261;
            "customer_id" = 178728;
            name = "Two, Test";
        }
    ),
        (
    ),
        (
                {
            "c_id" = 261;
            "customer_id" = 185186;
            name = "Valid, Another";
        }
    ),
        (
                {
            "c_id" = 261;
            "customer_id" = 183889;
            name = "White, Betty";
        }
    ),
        (
    ),
        (
    ),
        (
    ),
        (
    )
)
2012-03-27 08:35:24.766 MyApp[67330:fb03] Filtered Customers (
)

注意名称键周围的“”缺失。我相信这就是我NSPredicate searchDisplayController无效的原因。为什么要删除引号以及如何修复searchDisplayController工作？

Answer 1

我只是注意到，在你的谓词中，你在％@周围有单引号 - 它们不应该在那里。将单引号放在％@周围会将其转换为文字。

Dictionary对象不会谓词

1 个答案: