Question

我在Xcode项目中实现了一个搜索栏来过滤核心数据记录。问题是Seach接缝工作（搜索数组正确填充，tableview的行数正确显示）但Cell是空的。这是我的代码：

h file：

#import <UIKit/UIKit.h>
#import <CoreData/CoreData.h>

@interface iDataTable : UITableViewController <UISearchBarDelegate, UISearchDisplayDelegate> {
int nonume;
NSString *nume;
NSArray *arrTitle;
}
@property (strong, nonatomic) NSFetchedResultsController *fetchedResultsController;
@property (strong, nonatomic) NSManagedObjectContext *managedObjectContext;
@property (nonatomic, retain) NSString *nume;
@property (nonatomic) int nonume;
@property (nonatomic, retain) NSMutableArray *arrSearchRes;

@end

m file：

#import "iDataTable.h"
#import "AppDelegate.h"

@interface iDataTable ()

@end

@implementation iDataTable
@synthesize fetchedResultsController = __fetchedResultsController;
@synthesize managedObjectContext = __managedObjectContext;
@synthesize nume, nonume;
@synthesize arrSearchRes;


- (void)viewDidLoad{
[super viewDidLoad];


self.arrSearchRes = [NSMutableArray arrayWithCapacity:[[self.fetchedResultsController fetchedObjects] count]];

AppDelegate *appDelegate = 
[[UIApplication sharedApplication] delegate];
NSManagedObjectContext *context = 
[appDelegate managedObjectContext];
NSEntityDescription *entityDesc = 
[NSEntityDescription entityForName:nume                   ///// language
            inManagedObjectContext:context];
NSFetchRequest *request = [[NSFetchRequest alloc] init];
[request setEntity:entityDesc];


NSPredicate *pred = 
[NSPredicate predicateWithFormat:@"(nume != '')"];

request.sortDescriptors = [NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"data" ascending:NO]];

[request setPredicate:pred];
NSError *error;
arrTitle = [context executeFetchRequest:request 
                                  error:&error];

[self.tableView reloadData];

}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}

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

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

NSManagedObject* matches = nil;

     if (tableView == self.searchDisplayController.searchResultsTableView) {
        matches = [arrSearchRes objectAtIndex:indexPath.row];  // get search data
    }
    else {
        matches = [arrTitle objectAtIndex:indexPath.row];  // get general data            
    }

UILabel *cellLabel = (UILabel *)[cell viewWithTag:1];
[cellLabel setText:[matches valueForKey:@"nume"]];


}
else {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"Cell"];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}

return cell;
}


-(void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope {

AppDelegate *appDelegate = 
[[UIApplication sharedApplication] delegate];
NSManagedObjectContext *context = 
[appDelegate managedObjectContext];
NSEntityDescription *entityDesc = 
[NSEntityDescription entityForName:nume                   ///// language
            inManagedObjectContext:context];
NSFetchRequest *request = [[NSFetchRequest alloc] init];
[request setEntity:entityDesc];


NSPredicate *pred = 
[NSPredicate predicateWithFormat:@"(nume != %@)", searchText];

request.sortDescriptors = [NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"data" ascending:NO]];

[self.arrSearchRes removeAllObjects];

[request setPredicate:pred];
NSError *error;

NSArray *arr = [context executeFetchRequest:request error:&error];

self.arrSearchRes = [[NSMutableArray alloc] initWithArray:arr];

NSLog(@"%@, %@", arrSearchRes, searchText); // ok - arrSearchRes looks ok

}


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

return YES;
}

-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption {
[self filterContentForSearchText:[self.searchDisplayController.searchBar text] scope:[[self.searchDisplayController.searchBar scopeButtonTitles] objectAtIndex:searchOption]];

return YES;
}

谢谢！

Answer 1

这对我有用：

[self.searchDisplayController.searchResultsTableView reloadData];

Xcode：搜索栏结果加载到搜索数组中但未显示在tableview中

1 个答案: