Question

我需要帮助设置PFQTVC搜索功能。我已经完成了大部分内容，但我仍然坚持如何切换远程数据的本地数据（self.tabledata）（self.objects）。这是我的代码。我坚持使用filterContentForSearchText方法。

#import "ViewController.h"

@interface ViewController () <UISearchDisplayDelegate>

@property (nonatomic, strong) NSArray *tableData;
@property (nonatomic, strong) NSMutableArray *searchResult;

@end

@implementation ViewController

- (id)initWithCoder:(NSCoder *)aCoder
{
    self = [super initWithCoder:aCoder];
    if (self) {
        // Custom the table

        // The className to query on
        self.parseClassName = @"profs";

        // The key of the PFObject to display in the label of the default cell style
        self.textKey = @"name";

        // Whether the built-in pull-to-refresh is enabled
        self.pullToRefreshEnabled = YES;

        // Whether the built-in pagination is enabled
        self.paginationEnabled = YES;

        // The number of objects to show per page
        self.objectsPerPage = 500;
    }
    return self;
}


- (void)viewDidLoad
{
    [super viewDidLoad];

//    self.tableData = @[@"One",@"Two",@"Three",@"Twenty-one"];
    self.searchResult = [NSMutableArray arrayWithCapacity:[self.objects count]];
}

- (PFQuery *)queryForTable
{

    PFQuery *query;


        query = [PFQuery queryWithClassName:self.parseClassName];







    // If no objects are loaded in memory, we look to the cache first to fill the table
    // and then subsequently do a query against the network.
    /*    if ([self.objects count] == 0) {
     query.cachePolicy = kPFCachePolicyCacheThenNetwork;
     }*/

    return query;
}



- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    if (tableView == self.searchDisplayController.searchResultsTableView)
    {
        return [self.searchResult count];
    }
    else
    {
        return [self.objects count];
    }
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }

    if (tableView == self.searchDisplayController.searchResultsTableView)
    {
        cell.textLabel.text = [self.searchResult objectAtIndex:indexPath.row];
    }
    else
    {
        cell.textLabel.text = [object objectForKey:@"name"];
    }

    return cell;
}

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope 
{
    [self.searchResult removeAllObjects];
    NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:@"SELF contains[c] %@", searchText];



    self.searchResult = [NSMutableArray arrayWithArray: [self.tableData filteredArrayUsingPredicate:resultPredicate]];
}

-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
    [self filterContentForSearchText:searchString scope:[[self.searchDisplayController.searchBar scopeButtonTitles] objectAtIndex:[self.searchDisplayController.searchBar selectedScopeButtonIndex]]];

    return YES;
}

@end

Answer 1

试试这个：

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope 
{
    [self.searchResult removeAllObjects];
    NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:@"%K CONTAINS[c] %@", YOUR_FIELD_TO_COMPARE, searchText];



self.searchResult = [NSMutableArray arrayWithArray: [self.tableData filteredArrayUsingPredicate:resultPredicate]];
}

YOUR_FIELD_TO_COMPARE是您在搜索中比较的值的字段名称，例如"name"

实现PFQueryTableViewController搜索功能

1 个答案: