当我为 iOS7 升级我的应用程序时，我遇到了一个带有 SearchBar 的 UITableViews 的问题。我计划在我的更新中使用包含 TableView 和 SearchBar 的 UIViewController，但我不知道如何让它在这种组合中运行。
这是我的 .h 文件
#import <UIKit/UIKit.h>
@interface lsoNewKE_Table : UIViewController <UISearchDisplayDelegate, UISearchBarDelegate, NSFetchedResultsControllerDelegate, UITableViewDataSource, UITableViewDelegate> {
NSMutableArray * filteredListContent;
NSMutableArray * filteredList;
BOOL isSearchContent;
@private
NSFetchedResultsController *fetchedResultsController__;
NSManagedObjectContext *managedObjectContext__;
}
@property (nonatomic, retain) NSFetchedResultsController *fetchedResultsController;
@property (strong, nonatomic) NSManagedObjectContext *managedObjectContext;
@property (strong, nonatomic) NSMutableArray *keTableData;
@property (nonatomic, retain) NSMutableArray *filteredListContent;
@property (nonatomic, retain) NSMutableArray *filteredList;
@property (strong, nonatomic) IBOutlet UITableView *tableView;
- (void)readDataForTable;
@end
这是 .m 文件
#import "lsoNewKE_Table.h"
#import "TblKE.h"
#import "CoreDataHelper.h"
#import "lsoAppDelegate.h"
// #import "lsoDetailViewKE.h"
#import "lsoTableViewCell.h"
@interface lsoNewKE_Table ()
@end
@implementation lsoNewKE_Table
@synthesize keTableData, managedObjectContext=managedObjectContext__, filteredListContent, filteredList, tableView, fetchedResultsController=fetchedResultsController__;
- (void)reloadFetchedResults:(NSNotification*)note {
NSError *error = nil;
if (![[self fetchedResultsController] performFetch:&error]) {
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
}
if (note) {
NSLog(@"reloadFetchedResults");
[self readDataForTable];
}
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
self.filteredListContent = [NSMutableArray arrayWithCapacity:[self.keTableData count]];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reloadFetchedResults:) name:@"RefreshAllViews" object:[[UIApplication sharedApplication] delegate]];
[super viewDidLoad];
UIColor* bgColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"amazonas.png"]];
[self.view setBackgroundColor:bgColor];
[self readDataForTable];
isSearchContent = FALSE;
self.searchDisplayController.searchBar.delegate = self;
self.tableView.tableHeaderView = self.searchDisplayController.searchBar;
}
- (void)viewWillAppear:(BOOL)animated
{
// Repopulate the array with new table data
[self readDataForTable];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)viewDidUnload {
[super viewDidUnload];
self.filteredListContent = nil;
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
- (void)readDataForTable
{
lsoAppDelegate *appDelegate = (lsoAppDelegate *)[[UIApplication sharedApplication] delegate];
// Grab the data
keTableData = [CoreDataHelper getObjectsForEntity:@"TblKE" withSortKey:@"desc" andSortAscending:YES andContext:appDelegate.managedObjectContext];
// Force table refresh
[self.tableView reloadData];
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (self.tableView == self.searchDisplayController.searchResultsTableView)
{
return [self.filteredListContent count];
}
else
{
return [keTableData count];
}
}
// Create / reuse a table cell and configure it for display
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"CustomCellKE";
lsoTableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *topLevelObjects;
topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"CustomCellKE_iPhone" owner:nil options:nil];
for (id currentObject in topLevelObjects) {
if ([currentObject isKindOfClass:[UITableViewCell class]]){
cell = (lsoTableViewCell *) currentObject;
}
}
}
TblKE *currentCell;
// Get the core data object we need to use to populate this table cell
if (self.tableView == self.searchDisplayController.searchResultsTableView)
{
self.tableView.backgroundColor = [UIColor blackColor];
currentCell = [self.filteredListContent objectAtIndex:indexPath.row];
}
else
{
currentCell = [keTableData objectAtIndex:indexPath.row];
}
// Fill in the cell contents
cell.textLabel.text = [currentCell desc];
cell.detailTextLabel.text = [NSString stringWithFormat:@"Gewicht: %@ - KE: %.1f", [currentCell gewicht], [[currentCell ke]doubleValue]];
cell.imageView.contentMode = UIViewContentModeScaleAspectFit;
cell.imageView.image = [UIImage imageWithData:[currentCell picture]];
return cell;
}
// Swipe to delete has been used. Remove the table item
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete)
{
lsoAppDelegate *appDelegate = (lsoAppDelegate *)[[UIApplication sharedApplication] delegate];
// Get a reference to the table item in our data array
TblKE *itemToDelete = [self.keTableData objectAtIndex:indexPath.row];
// Delete the item in Core Data
[appDelegate.managedObjectContext deleteObject:itemToDelete];
// Remove the item from our array
[keTableData removeObjectAtIndex:indexPath.row];
// Commit the deletion in core data
NSError *error;
if (![appDelegate.managedObjectContext save:&error])
NSLog(@"Failed to delete Entry item with error: %@", [error domain]);
// Delete the row from the data source
[self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (isSearchContent == TRUE){
[self performSegueWithIdentifier:@"EditPicture" sender:self];
} else {
[self performSegueWithIdentifier:@"EditPicture" sender:nil];
}
}
#pragma mark -
#pragma mark Content Filtering
- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
/*
Update the filtered array based on the search text and scope.
*/
[self.filteredListContent removeAllObjects]; // First clear the filtered array.
/*
Search the main list for products whose name matches searchText; add items that match to the filtered array.
*/
for (TblKE *itemToSearch in keTableData)
{
NSComparisonResult result = [itemToSearch.desc compare:searchText options:(NSCaseInsensitiveSearch|NSDiacriticInsensitiveSearch) range:NSMakeRange(0, [searchText length])];
if (result == NSOrderedSame)
{
[self.filteredListContent addObject:itemToSearch];
isSearchContent = TRUE;
}
}
}
#pragma mark -
#pragma mark UISearchDisplayController Delegate Methods
- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
[self filterContentForSearchText:searchString scope:nil];
return YES;
}
-(void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {
isSearchContent = FALSE;
}
#pragma mark -
#pragma mark Fetched results controller
- (NSFetchedResultsController *)fetchedResultsController
{
lsoAppDelegate *appDelegate = (lsoAppDelegate *)[[UIApplication sharedApplication] delegate];
if (fetchedResultsController__ != nil)
{
return fetchedResultsController__;
}
/*
Set up the fetched results controller.
*/
// Create the fetch request for the entity.
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
// Edit the entity name as appropriate.
NSEntityDescription *entity = [NSEntityDescription entityForName:@"TblKE" inManagedObjectContext:appDelegate.managedObjectContext];
[fetchRequest setEntity:entity];
// Set the batch size to a suitable number.
[fetchRequest setFetchBatchSize:25];
// Edit the sort key as appropriate.
NSSortDescriptor *sortDescriptorName = [[NSSortDescriptor alloc] initWithKey:@"desc" ascending:YES];
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptorName, nil];
[fetchRequest setSortDescriptors:sortDescriptors];
// Edit the section name key path and cache name if appropriate.
// nil for section name key path means "no sections".
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:appDelegate.managedObjectContext sectionNameKeyPath:nil cacheName:nil];
aFetchedResultsController.delegate = self;
self.fetchedResultsController = aFetchedResultsController;
NSError *error = nil;
if (![self.fetchedResultsController performFetch:&error])
{
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}
return fetchedResultsController__;
}
@end
任何帮助将非常感激。
谢谢英格玛
对不起斯图尔特，你是对的，应该指出我的问题......
输入搜索词时，SearchBar 会变得一团糟，无论我在该字段中输入什么，它总是像这样出现：
我在 cellForRowAtIndexPath 的以下位置设置了一个断点，但它从未遇到过它。
if (self.tableView == self.searchDisplayController.searchResultsTableView)
{
self.tableView.backgroundColor = [UIColor blackColor];
currentCell = [self.filteredListContent objectAtIndex:indexPath.row];
}
else
{
currentCell = [keTableData objectAtIndex:indexPath.row];
}