这是更新后的帖子。
我有一个带有tableview的Viewcontroller，检查按钮（左侧）。当我在表格视图中单击我的检查按钮时，它可以很好地检查/取消检查。工作正常。
需要：
尽管点击了表格视图中的复选按钮。我需要单击我的单元格行，此时特定的选定单元格行检查按钮应该选中/取消选中。怎么样，我已经尝试过所有方式。但没有解决方案。这是我的viewcontroller.m文件：
提前致谢！
@interface ViewController ()
{
// UILabel *textLabel;
// UILabel *detailLabel;
NSDateFormatter *formatter;
}
@property (strong) NSMutableArray *notes;
@end
@implementation ViewController
@synthesize tableView;
@synthesize addButton;
@synthesize catefetchedResultsController,filteredTableData,searchSTR;
- (NSManagedObjectContext *)managedObjectContext {
NSManagedObjectContext *context = nil;
id delegate = [[UIApplication sharedApplication] delegate];
if ([delegate performSelector:@selector(managedObjectContext)]) {
context = [delegate managedObjectContext];
}
return context;
}
- (AppDelegate *)appDelegate
{
return (AppDelegate *)[[UIApplication sharedApplication] delegate];
}
#pragma mark - fetching
- (NSFetchedResultsController *)fetchedResultsControllerCate
{
if (catefetchedResultsController == nil)
{
NSManagedObjectContext* mangedobjectContext=[self appDelegate].managedObjectContext;
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Notes"
inManagedObjectContext:mangedobjectContext];
NSFetchRequest *request= [[NSFetchRequest alloc] init];
NSSortDescriptor *sd1 = [[NSSortDescriptor alloc] initWithKey:@"mod_time" ascending:YES];
NSSortDescriptor *sd2 = [[NSSortDescriptor alloc] initWithKey:@"title" ascending:YES];
NSArray *sortDescriptors = [NSArray arrayWithObjects:sd1,sd2, nil];
[request setSortDescriptors:sortDescriptors];
[request setEntity:entity];
NSPredicate *predicate;
if (self.searchSTR.length > 0) {
predicate=nil;
NSPredicate *predicate =[NSPredicate predicateWithFormat:@"(note CONTAINS[c] %@)",self.searchSTR]; //[NSPredicate predicateWithFormat:@"name LIKE %@",searchResults];
[request setPredicate:predicate];
}else{
}
[request setFetchBatchSize:10];
catefetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:request
managedObjectContext:mangedobjectContext
sectionNameKeyPath:nil
cacheName:nil];
[catefetchedResultsController setDelegate:self];
NSError *error = nil;
if (![catefetchedResultsController performFetch:&error])
{
NSLog(@"Error performing fetch: %@", error);
}
}
// NSLog(@"inside fetch %@",self.notes);
return catefetchedResultsController;
}
- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
{
if (controller==catefetchedResultsController)
{
[self.tableView reloadData];
// NSLog(@"inside");
}
}
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
NSString * searchStr = [textField.text stringByReplacingCharactersInRange:range withString:string];
if(textField == self.searchCate){
// [self filterCate:searchStr];
self.searchSTR=searchStr;
catefetchedResultsController=nil;
[self catefetchedResultsController];
[self.tableView reloadData];
}
return true;
}
-(void)filterCate:(NSString*)text
{
filteredTableData = [[NSMutableArray alloc] init];
// Create our fetch request
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
// Define the entity we are looking for
NSManagedObjectContext* mangedobjectContext=[self managedObjectContext];
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Notes"
inManagedObjectContext:mangedobjectContext];
[fetchRequest setEntity:entity];
NSPredicate *predicate;// = [NSPredicate predicateWithFormat:@"mod_time==%i",0];
// [fetchRequest setPredicate:predicate];
NSSortDescriptor *sd1 = [[NSSortDescriptor alloc] initWithKey:@"mod_time" ascending:YES];
NSSortDescriptor *sd2 = [[NSSortDescriptor alloc] initWithKey:@"title" ascending:YES];
NSArray *sortDescriptors = [NSArray arrayWithObjects:sd1,sd2, nil];
[fetchRequest setSortDescriptors:sortDescriptors];
// If we are searching for anything...
if(text.length > 0)
{
// Define how we want our entities to be filtered
predicate = [NSPredicate predicateWithFormat:@"(title CONTAINS[c] %@)", text];
[fetchRequest setPredicate:predicate];
}
NSError *error;
// Finally, perform the load
NSArray* loadedEntities = [mangedobjectContext executeFetchRequest:fetchRequest error:&error];
filteredTableData = [[NSMutableArray alloc] initWithArray:loadedEntities];
[self.tableView reloadData];
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.navigationItem.title = @"My Notes";
tableView.dataSource = self;
tableView.delegate = self;
[self.view addSubview:tableView];
formatter = [[NSDateFormatter alloc] init];
formatter.doesRelativeDateFormatting = YES;
formatter.locale = [NSLocale currentLocale];
formatter.dateStyle = NSDateFormatterShortStyle;
formatter.timeStyle = NSDateFormatterNoStyle;
CATransition *animation = [CATransition animation];
[animation setDuration:2.0];
[animation setType:kCATransitionPush];
[animation setSubtype:kCATransitionFromTop];
[animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionDefault]];
[[addButton layer] addAnimation:animation forKey:@"SwitchToDown"];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]
initWithTarget:self
action:@selector(dismissKeyboard)];
[self.view addGestureRecognizer:tap];
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
// Fetch the devices from persistent data store
NSManagedObjectContext *managedObjectContext = [self managedObjectContext];
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] initWithEntityName:@"Notes"];
NSError *error = nil;
self.notes = [[managedObjectContext executeFetchRequest:fetchRequest error:&error] mutableCopy];
NSSortDescriptor *titleSorter= [[NSSortDescriptor alloc] initWithKey:@"mod_time" ascending:NO];
[self.notes sortUsingDescriptors:[NSArray arrayWithObject:titleSorter]]
;
NSLog(@"Your Error - %@",error.description);
[tableView reloadData];
}
-(void)dismissKeyboard {
[_searchCate resignFirstResponder];
}
//- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
//
//}
//- (void)didReceiveMemoryWarning {
// [super didReceiveMemoryWarning];
// // Dispose of any resources that can be recreated.
//}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return [[[self fetchedResultsControllerCate] sections] count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)sectionIndex
{
// Return the number of rows in the section.
// return self.notes.count;
NSArray *sectionCate = [[self fetchedResultsControllerCate] sections];
if (sectionIndex < [sectionCate count])
{
id <NSFetchedResultsSectionInfo> sectionInfo = [sectionCate objectAtIndex:sectionIndex];
// NSLog(@"sectionInfo.numberOfObjects %lu",(unsigned long)sectionInfo.numberOfObjects);
return sectionInfo.numberOfObjects;
}
return 0;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
FilterButton *testButton = [[FilterButton alloc]initWithFrame:CGRectMake(5, 5, 40, 40)];
UIImageView*sideImage=[[UIImageView alloc] initWithFrame:CGRectMake(5, 5, 40, 40)];
// Configure the cell...
Notes*note=(Notes*)[[self fetchedResultsControllerCate] objectAtIndexPath:indexPath];
NSDate *date =note.mod_time;
NSString *dateString = [formatter stringFromDate:date];
if([note.check isEqualToString:@"yes"]){
cell.backgroundColor = [UIColor colorWithRed:230/255.0 green:231/255.0 blue:230/255.0 alpha:1];
// cell.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"bg"]]; //set image for cell 0
[sideImage setImage:[UIImage imageNamed:@"tick"]];
}else{
cell.backgroundColor = [UIColor clearColor];
// [testButton setImage:[UIImage imageNamed:@"oval"] forState:UIControlStateNormal];
[sideImage setImage:[UIImage imageNamed:@"oval"]];
// NSLog(@" write no");
}
testButton.myDate=note.mod_time;
cell.textLabel.text = note.title;
cell.detailTextLabel.text = dateString;
[testButton addTarget:self action:@selector(buttonTouched:) forControlEvents:UIControlEventTouchUpInside];
[cell setIndentationLevel:1];
[cell setIndentationWidth:45];
[cell.contentView addSubview:sideImage];
[cell.contentView addSubview:testButton];
return cell;
}
-(BOOL)textFieldShouldReturn:(UITextField*)textField
{
[textField resignFirstResponder];
return YES;
}
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
//cell.textLabel.font = [UIFont fontNamesForFamilyName:@"Avenir"];
cell.textLabel.font = [UIFont fontWithName:@"Avenir" size:19.0];
cell.detailTextLabel.font=[UIFont fontWithName:@"Avenir" size:15.0];
}
-(void)buttonTouched:(id)sender
{
FilterButton *btn = (FilterButton *)sender;
NSManagedObjectContext *context = [self managedObjectContext];
Notes * NotesUpdateing;
NSFetchRequest *request= [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Notes" inManagedObjectContext:context];
NSPredicate *predicate =[NSPredicate predicateWithFormat:@"mod_time==%@",btn.myDate];
// NSLog(@"btn.myDate ..%@",btn.myDate);
[request setEntity:entity];
[request setPredicate:predicate];
NSError *error = nil;
// Below line is giving me error
NSArray *array = [context executeFetchRequest:request error:&error];
if (array != nil) {
NSUInteger count = [array count]; // may be 0 if the object has been deleted.
if(count==0){
NSLog(@"nothing to updates");
}else{
NotesUpdateing = (Notes*)[array objectAtIndex:0];
if ([NotesUpdateing.check isEqualToString:@"no"]) {
NotesUpdateing.check=@"yes";
NSLog(@" write yes");
btn.selected=NO;
}
else
{
NotesUpdateing.check=@"no";
btn.selected=NO;
NSLog(@" write no");
}
}
}
if (![context save:&error]) {
NSLog(@"Can't Save! %@ %@", error, [error localizedDescription]);
}
[self.tableView reloadData];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
Notes *note = (Notes *)[[self fetchedResultsControllerCate] objectAtIndexPath:indexPath];
note.check = [note.check isEqualToString:@"yes"] ? @"no" : @"yes";
[tableView beginUpdates];
[tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationNone];
[tableView endUpdates];
}
- (IBAction)addButtonPressed:(id)sender {
AddNoteViewController *addNoteVC = [AddNoteViewController new];
// to remove unused warning....
#pragma unused (addNoteVC)
}
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
- (void)tableView:(UITableView *)cTableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
// NSManagedObjectContext *context = [self managedObjectContext];
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete object from database
NSError *error = nil;
Notes*note=(Notes*)[[self fetchedResultsControllerCate] objectAtIndexPath:indexPath];
NSManagedObjectContext *context = [self managedObjectContext];
NSFetchRequest *request= [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Notes" inManagedObjectContext:context];
NSPredicate *predicate =[NSPredicate predicateWithFormat:@"mod_time==%@",note.mod_time];
// NSLog(@"btn.myDate ..%@",btn.myDate);
[request setEntity:entity];
[request setPredicate:predicate];
// Below line is giving me error
NSArray *array = [context executeFetchRequest:request error:&error];
if (array != nil) {
NSUInteger count = [array count]; // may be 0 if the object has been deleted.
if(count==0){
NSLog(@"nothing to updates");
}else{
[context deleteObject:[array objectAtIndex:0]];
}
}
if (![context save:&error]) {
NSLog(@"Can't Delete! %@ %@", error, [error localizedDescription]);
return;
}
}
}
- (IBAction)btnClick:(id)sender {
}
-(UITableViewCell*)CategoryTablecreateCellFor:(UITableViewCell*)cell CellindexPath:(NSIndexPath*)indexPath{
Notes*cateRecipe=(Notes*)[[self fetchedResultsControllerCate] objectAtIndexPath:indexPath];
UILabel *txt=[[UILabel alloc] initWithFrame:CGRectMake(130, 0, 150, 70)];
txt.text=cateRecipe.title;
txt.textColor=[UIColor darkGrayColor];
[txt setFont: [UIFont fontWithName:@"Helvetica" size:15.0]];
cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator;
[cell.contentView addSubview:txt];
return cell;
}
@end
这是我的cellForRowAtIndexPath：
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
FilterButton *testButton = [[FilterButton alloc]initWithFrame:CGRectMake(5, 5, 40, 40)];
UIImageView*sideImage=[[UIImageView alloc] initWithFrame:CGRectMake(5, 5, 40, 40)];
// Configure the cell...
Notes*note=(Notes*)[[self fetchedResultsControllerCate] objectAtIndexPath:indexPath];
NSDate *date =note.mod_time;
NSString *dateString = [formatter stringFromDate:date];
if([note.check isEqualToString:@"yes"]){
cell.backgroundColor = [UIColor colorWithRed:230/255.0 green:231/255.0 blue:230/255.0 alpha:1];
// cell.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"bg"]]; //set image for cell 0
[sideImage setImage:[UIImage imageNamed:@"tick"]];
}else{
cell.backgroundColor = [UIColor clearColor];
// [testButton setImage:[UIImage imageNamed:@"oval"] forState:UIControlStateNormal];
[sideImage setImage:[UIImage imageNamed:@"oval"]];
// NSLog(@" write no");
}
testButton.myDate=note.mod_time;
cell.textLabel.text = note.title;
cell.detailTextLabel.text = dateString;
[testButton addTarget:self action:@selector(buttonTouched:) forControlEvents:UIControlEventTouchUpInside];
[cell setIndentationLevel:1];
[cell setIndentationWidth:45];
[cell.contentView addSubview:sideImage];
[cell.contentView addSubview:testButton];
return cell;
}
这是我的 didselectrowatindexpath：
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
Notes *note = (Notes *)[[self fetchedResultsControllerCate] objectAtIndexPath:indexPath];
note.check = [note.check isEqualToString:@"yes"] ? @"no" : @"yes";
[tableView beginUpdates];
[tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationNone];
[tableView endUpdates];
}
现在它不起作用了。不知道我错过了什么？
答案 0 :(得分：1)
这样的事情应该有效：
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
Notes *note = (Notes *)[[self fetchedResultsControllerCate] objectAtIndexPath:indexPath];
note.checked = [note.checked isEqualToString:@"yes"] ? @"no" : @"yes";
[tableView beginUpdates];
[tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationNone];
[tableView endUpdates];
}
答案 1 :(得分：0)
您需要创建一个用于存储所选索引路径的数组。在didSelectRowAtIndexPath方法中添加或删除数组中的索引路径，并相应地重新加载reloadRowsAtIndexPaths。