Question

我有一个PickerView和TableView并且我将数据从服务器加载到pickerView，一旦我在选择器中选择了城市，我就会在tableView中显示结果。

要做到这一点，我使用NSPredicate从词典中过滤它并显示结果......但它没有显示任何值。那么请问我的问题在哪里？我做错了吗？

数据要求PickerView

{"Status":1,"Response":[{"ID":19,"Title":"G.A","Name":"G.A"},{"ID":8,"Title":"Mexico","Name":"Mexico"},{"ID":17,"Title":"USA","Name":"USA"},...

数据调用tableView

{"ID":309436,"CountryID":8,"CountryName":"Mexico","Previous":"%3,0","Actual":"%3,0","cast":"%2,9","Event":"M2","Priority":1,"Date":"14.10.2014","Time":"01:50:00"},{"ID":309437,"CountryID":8,"CountryName":"Mexico","Previous":"%2,4","Actual":"%2,5","cast":"%2,4","Event":"M3","Priority":1,"Date":"14.10.2014","Time":"01:50:00"},{"ID":317211,"CountryID":17,"CountryName":"USA","Previous":"%0,1","Actual":"%1,2","cast":"%1,4","Event":"GPS1","Priority":3,"Date":"14.10.2014","Time":"02:00:00"},{"ID":317212,"CountryID":17,"CountryName":"USA","Previous":"%2,4","Actual":"%2,4","cast":"%2,6","Event":"GPS","Priority":3,"Date":"14.10.2014","Time":"02:00:00"},

我想获得Event和Date值。

- (void)runURL

    NSURL *url = [NSURL URLWithString:@"http://www.example.com.ashx"];

NSURLRequest *request = [NSURLRequest requestWithURL:url];
[NSURLConnection sendAsynchronousRequest:request
                                   queue:[NSOperationQueue mainQueue]
                       completionHandler:^(NSURLResponse *response,
                                           NSData *data, NSError *connectionError)
 {
     if (data.length > 0 && connectionError == nil)
     {
         dicList2 = [NSJSONSerialization JSONObjectWithData:data
                                                                  options:0
                                                                    error:NULL];

         if([[[dicList2 objectForKey:@"Success"] stringValue] isEqualToString:@"1"]){

             [dataCalendarArray3 addObjectsFromArray:[dicList2 objectForKey:@"Response"]];
         }
}

- (void)runPredicate
{
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF.CountryName MATCHES ‘%@‘", @"Mexico"];

    NSArray *ar = [dicList2 objectForKey:@"Response"];

    NSArray *filter = [ar filteredArrayUsingPredicate:pred];

    NSLog(@"New List %@",filter);
}

Answer 1

试试这个NSPredicate * resultPredicate = [NSPredicate predicateWithFormat：@“SELF包含[cd]％@”，searchText];

NSPredicate过滤问题

1 个答案: