ios - UITableView 中的 UISearchBar

Question

我正在尝试将搜索功能添加到我的表格 View 中。我从创建 UITableView 开始，它工作得很好。问题是当我开始在搜索栏中书写时出现此错误:

Terminating app due to uncaught exception 'NSUnknownKeyException',
reason: '[<__NSCFString 0x8c44c00> valueForUndefinedKey:]:
this class is not key value coding-compliant for the key name.'

然后我将搜索栏和搜索显示添加到 View Controller 。

searchdisplaycontroller socket :

View Controller socket :

在viewdidload中

self.filteredArray = [NSMutableArray arrayWithCapacity:[finalArray count]];

numberOfRows 方法:

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    // Return the number of rows in the section.
    if (tableView == self.searchDisplayController.searchResultsTableView) {
        NSLog(@"lol");
        return [filteredArray count];
    } else {
        return [rows count];
    }

}

其余方法:

-(void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope {
    // Update the filtered array based on the search text and scope.
    // Remove all objects from the filtered search array
    [self.filteredArray removeAllObjects];
    // Filter the array using NSPredicate
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF.name contains[c] %@",searchText];
    filteredArray = [NSMutableArray arrayWithArray:[finalArray     filteredArrayUsingPredicate:predicate]];
}

-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString {
    // Tells the table data source to reload when text changes
    [self filterContentForSearchText:searchString scope:
     [[self.searchDisplayController.searchBar scopeButtonTitles] objectAtIndex:[self.searchDisplayController.searchBar selectedScopeButtonIndex]]];
    // Return YES to cause the search result table view to be reloaded.
    return YES;
}

-(BOOL)searchDisplayController:(UISearchDisplayController *)controller     shouldReloadTableForSearchScope:(NSInteger)searchOption {
    // Tells the table data source to reload when scope bar selection changes
    [self filterContentForSearchText:self.searchDisplayController.searchBar.text scope:
     [[self.searchDisplayController.searchBar scopeButtonTitles] objectAtIndex:searchOption]];
    // Return YES to cause the search result table view to be reloaded.
    return YES;
}

Answer 1

问题出在你的谓词上。如果您在错误消息中看到，它说 此类对于键名称不符合键值编码。'

在你的谓词中，

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF.name contains[c] %@",searchText];

您正在搜索不存在的属性 (name) 上的文本。在没有看到更多代码或了解更多您想要完成的事情的情况下，将谓词更改为 @"SELF contains..." 而不是 @"SELF.name contains. .." 应该可以解决问题。

可以看到the Apple docs on predicates或 this article获取更多信息。