This is strange, I know, but my [UITableView reloadData] does not delete old cells, for example:
The damage you see occurred after I pressed the + button , returned and changed the values again. plus button pushes navigation controller to another controller, and after I returned from the touch of a button back and changed the value, that's what I see. How is this possible ?? I used a custom view (subclassed from UIView) that I created as a UIStepper with UILabel. Here are the codes, the .m controller and the .h-.m files for the custom UIView.
controller.m
@interface ViewController ()
@property NSString *docsDir;
@property sqlite3 *DB;
@property NSArray *dirPaths;
@property NSString* databasePath;
@property (strong, nonatomic) IBOutlet UITableView *tableView;
@property BOOL isCreatedBefore;
@property NSArray *theList;
@end
@implementation ViewController
@synthesize docsDir;
@synthesize DB;
@synthesize dirPaths;
@synthesize databasePath;
- (void)viewDidLoad
{
[super viewDidLoad];
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
databasePath = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent: [NSString stringWithFormat:@"database.db"]]];
[self createDatabase];
self.theList = [self readAllEntries];
}
-(void) viewWillAppear:(BOOL)animated{
self.theList = [self readAllEntries];
[self.tableView reloadData];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.theList count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{ SeriesObject * obj = [self.theList objectAtIndex:indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cellocan"];
UILabel *nameLabel = (UILabel *)[cell.contentView viewWithTag:1];
[nameLabel setText:obj.name];
CounterView *seasonCounter = [[CounterView alloc] initWithX:220 WithY:28 WithName:obj.name withCount:obj.session withCustomTag:indexPath.row];
seasonCounter.tag = 2;
CounterView *episodeCounter = [[CounterView alloc] initWithX:268 WithY:28 WithName:obj.name withCount:obj.episode withCustomTag:indexPath.row];
episodeCounter.tag = 4;
[cell.contentView addSubview:seasonCounter];
[cell.contentView addSubview:episodeCounter];
return cell;
}
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
// Return YES if you want the specified item to be editable.
return YES;
}
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
SeriesObject *obj = [self.theList objectAtIndex:indexPath.row];
[self deleteEntryWithID:obj.idd];
self.theList = [self readAllEntries];
[self.tableView reloadData];
}
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
return 88;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
______and more about reading from database or deleting; not about the view. (this is a very simple app, as a free time hobby; so I didn't spend time to follow MVC)
Counterview.h
@interface CounterView : UIView
@property NSString* name;
@property NSInteger count;
@property UILabel *label;
@property NSInteger customTag;
- (id)initWithX:(CGFloat)xPoint WithY:(CGFloat)yPoint WithName:(NSString*)newName withCount:(NSInteger)newCount withCustomTag:(NSInteger)newTag;
@end
CounterView.m
@interface CounterView()
@property NSString *docsDir;
@property sqlite3 *DB;
@property NSArray *dirPaths;
@property NSString* databasePath;
@end
@implementation CounterView
@synthesize docsDir;
@synthesize DB;
@synthesize dirPaths;
@synthesize databasePath;
- (id)initWithX:(CGFloat)xPoint WithY:(CGFloat)yPoint WithName:(NSString*)newName withCount:(NSInteger)newCount withCustomTag:(NSInteger)newTag
{
self = [super initWithFrame:CGRectMake(xPoint, yPoint, 24, 52)];
if (self) {
self.customTag = newTag;
self.count = newCount;
self.name = newName;
UIButton *btnUp = [[UIButton alloc] initWithFrame:CGRectMake(3, 2, 18, 12)];
[btnUp setImage:[UIImage imageNamed:@"top.png"] forState:UIControlStateNormal];
[btnUp addTarget:self action:@selector(increaseValue) forControlEvents:UIControlEventTouchUpInside];
UIButton *btnDown = [[UIButton alloc] initWithFrame:CGRectMake(3, 38, 18, 12)];
[btnDown setImage:[UIImage imageNamed:@"bottom.png"] forState:UIControlStateNormal];
[btnDown addTarget:self action:@selector(decreaseValue) forControlEvents:UIControlEventTouchUpInside];
self.label = [[UILabel alloc] initWithFrame:CGRectMake(0, 14, 24, 24)];
[self.label setText:[NSString stringWithFormat:@"%ld", (long)self.count]];
self.label.textAlignment = NSTextAlignmentCenter;
[self addSubview:btnUp];
[self addSubview:btnDown];
[self addSubview:self.label];
}
return self;
}
- (void)addTarget:(id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents{
}
-(void) increaseValue{
self.count++;
[self.label setText:[NSString stringWithFormat:@"%ld", (long)self.count]];
}
-(void) decreaseValue{
self.count--;
[self.label setText:[NSString stringWithFormat:@"%ld", (long)self.count]];
}
____and some more database codes too..