尝试使用 Parse.com 在我的应用程序上实现 UISearchController 进行查询。网上有一些例子，但旧的“UISearchDisplayController”现在已弃用。
无论如何，就搜索和查询（根据我的 NSLog）而言，我似乎一切正常，但 tableview 根本没有更新，我不知道为什么。
这是我所做的：
@interface LocalSalesViewController () <UISearchResultsUpdating, UISearchControllerDelegate>
@property (nonatomic, strong) UISearchController *searchController;
@property (nonatomic, strong) NSMutableArray *searchResults; // Filtered search results
@end
@implementation LocalSalesViewController
- (id)initWithCoder:(NSCoder *)aCoder {
self = [super initWithCoder:aCoder];
if (self) {
self.parseClassName = @"Sales";
self.pullToRefreshEnabled = YES;
self.paginationEnabled = YES;
self.objectsPerPage = 25;
}
return self;
}
- (void)viewDidLoad {
[super viewDidLoad];
self.searchResults = [NSMutableArray array];
self.searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
self.searchController.searchResultsUpdater = self;
self.searchController.delegate = self;
self.searchController.searchBar.frame = CGRectMake(self.searchController.searchBar.frame.origin.x, self.searchController.searchBar.frame.origin.y, self.searchController.searchBar.frame.size.width, 44.0);
self.tableView.tableHeaderView = self.searchController.searchBar;
self.definesPresentationContext = YES;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object
{
static NSString *CellIdentifier = @"Cell";
LocalSalesTableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
if (cell == nil)
{
cell = [[LocalSalesTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
object = (tableView == self.tableView) ? self.objects[indexPath.row] : self.searchResults[indexPath.row];
cell.saleTitle.text = [object objectForKey:@"name"];
return cell;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (tableView == self.tableView) {
return self.objects.count;
} else {
return self.searchResults.count;
}
}
#pragma mark - UISearchResultsUpdating
-(void)updateSearchResultsForSearchController:(UISearchController *)searchController {
NSString *searchString = [self.searchController.searchBar text];
[self updateFilteredContentForSaleName:searchString];
[((UITableViewController *)self.searchController.searchResultsController).tableView reloadData];
}
#pragma mark - Content Filtering
- (void)updateFilteredContentForSaleName:(NSString *)saleName {
[self.searchResults removeAllObjects];
for (PFObject *sale in self.objects)
{
NSString *saleTitle = [sale objectForKey:@"name"];
if ([[saleTitle lowercaseString] hasPrefix:[saleName lowercaseString]])
{
[self.searchResults addObject:sale];
}
}
NSLog(@"%@", self.searchResults);
}
似乎 self.searchResults 日志正在通过过滤掉那些并添加到数组来完成它应该做的所有事情，但是根本没有更新任何单元格。