Question

在视图中，有一个文本字段和一个选择器视图。选取器视图项是从Parse查询加载的。文本字段文本始终是选取器视图项之一。选择器视图选定项必须与文本字段文本相同。这是我目前的代码，但它抛出异常：

PFQuery *query = [PFQuery queryWithClassName:@"floors"];
[query whereKey:@"floor_restaurant" equalTo:self.restaurante.objectId];
[query orderByDescending:@"createdAt"];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {

if（！error）{ _pickerData = objects;

    for (int i = 0; i < [objects count]; i++)
    {
        if ([[objects objectAtIndex:i] isEqualToString: self.floor_name_text.text]){
            [self.floor_picker selectRow:i inComponent:0 animated:YES];

            break;
        }

    }

    [self.floor_picker reloadAllComponents];



}
else {
    NSLog(@"error");
}

}];

这是例外：

2015-02-28 21:03:20.707 RestAppXXI[675:60b] -[PFObject isEqualToString:]: unrecognized selector sent to instance

我是iOS的Parse新手，欢迎任何帮助。

已编辑：

- (NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    PFObject *object = _pickerData[row];

        return object[@"floor_name"];


}

Answer 1

感谢rmaddy的评论和一些搜索，我已经解决了我的问题，这是最终的代码：

[PFQuery *query = [PFQuery queryWithClassName:@"floors"];
    [query whereKey:@"floor_restaurant" equalTo:self.restaurante.objectId];
    [query orderByDescending:@"createdAt"];
    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        if (!error) {
            _pickerData = objects;


            for (int i = 0; i < [objects count]; i++)
            {
                NSString *textoactual = self.floor_name_text.text;


                if ([[[objects  objectAtIndex:i] objectForKey:@"floor_name" ] isEqualToString: textoactual]){

                    [self.floor_picker reloadAllComponents];
                    [self.floor_picker selectRow:i inComponent:0 animated:YES];

                    break;
                }

            }





        }
        else {
            NSLog(@"error");
        }
    }];

在Parse对象中设置UIPickerView中的选定行

1 个答案: