我有兩個視圖控制器,TypeViewController
和FavoritesViewController
,TypeViewController
包含一個可以通過按UIBarButtonItem
來收藏的類型。按下按鈕將該類型保存到數組,並將該數組保存到文件中。 FavoritesViewController
打開該文件並使用其數組填充UITableView,我在其中使用ViewDidLoad
方法,然後在最後添加[self.tableView reloadData]
以確保tableView將被填充。但是,我注意到當我嘗試不喜歡某個類型時(通過再次按UIBarButtonItem
),它不會從tableView中刪除。我不知道我應該如何去做這件事!我怎樣才能刪除tableView單元格?任何輸入將不勝感激,請讓我知道,如果我需要給任何其他細節!由於= d從另一個UIViewController中從UITableView中刪除一個單元格
下面是一些代碼:
從TypeViewController
:
//When The UIBarButtonItem is pressed
-(IBAction)favoriteTheSubject:(id)sender{
//Open the saved array
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *arrayFileName = [documentsDirectory stringByAppendingPathComponent:@"favoritedTypes.dat"];
NSMutableArray *favoritedTypeInfo = [[NSMutableArray alloc] initWithContentsOfFile: arrayFileName];
//If the array file does not exist, set the array
if(favoritedTypeInfo == nil)
{
NSLog(@"Didn't exist in SecondaryDetailVC");
favoritedTypeInfo = [[NSMutableArray alloc] init];
}
//Favorite item
if ([self.navigationItem.rightBarButtonItem.image isEqual:[UIImage imageNamed:@"FavButton.png" ]]) { //FavButton.png is the unselected favorite button
[self.navigationItem.rightBarButtonItem setImage:[UIImage imageNamed:@"FavButtonSelected.png"]];//Change the image
//Add the type
[favoritedTypeInfo addObject:typeOfObject];
[favoritedTypeInfo addObject:priceOfType];
NSLog(@"Added Item");
[favoritedTypeInfo writeToFile:arrayFileName atomically:YES];
}
else{ //Unfavorite Item
[self.navigationItem.rightBarButtonItem setImage:[UIImage imageNamed:@"FavButton.png"]];
//Create an array to insert all the values to remove
NSMutableArray *removeArray = [[NSMutableArray alloc]init];
for (int i = 0; i < [favoritedTypeInfo count]; i++) {
NSString *sameTitle =favoritedTypeInfo[i];
if ([self.tableTitle isEqualToString:sameTitle]) {
//Add typeOfObject and priceOfType to removeArray
[removeArray addObject:favoritedTypeInfo[i]];
[removeArray addObject:favoritedTypeInfo[i+1]];
NSLog(@"Removed %@", removeArray[i]);
}
}
//Remove objects
[favoritedTypeInfo removeObjectsInArray:removeArray];
[favoritedTypeInfo writeToFile:arrayFileName atomically:YES];
}
}
從FavoriteViewController
:
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
//Open the array from file
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *arrayFileName = [documentsDirectory stringByAppendingPathComponent:@"favoritedTypes.dat"];
NSMutableArray *savedArray = [[NSMutableArray alloc] initWithContentsOfFile: arrayFileName];
if(savedArray == nil)
{
NSLog(@"Couldn't Open Favorites Array");
}else{
for (int i = 0; i < [savedArray count]; i++) {
if (i%2 == 0) {
//Array for favorited typesOfObject
[self.favoritedTypesInfo addObject:savedArray[i]];
} else if (i%2 == 1){
//Array for favorited priceOftypes
[self.favoritedPriceTypes addObject:savedArray[i]];
}
}
//Test to see if there are duplicate objects in arrays
int countFavorited = 0;
for (int i = 0; i < [self.favoritedTypesInfo count]; i++) {
for (int k = 0; k < [self.favoritedTypesInfo count]; k++) {
NSString *kString = [self.favoritedTypesInfo objectAtIndex:k];
NSString *iString = [self.favoritedTypesInfo objectAtIndex:i];
if ([kString isEqualToString:iString] && kString.length == iString.length) {
NSLog(@"%@ : %@", kString, iString);
countFavorited += 1;
if (countFavorited > 1) {
[self.favoritedTypesInfo removeObjectAtIndex:k];
[self.favoritedPriceTypes removeObjectAtIndex:k];
countFavorited = 0;
}
}
}
}
}
[self.tableView reloadData];
}
您是否在數組中刪除該類型? –
是的!我在刪除它之後重新將它寫入文件。我忘了補充,如果我關閉我的應用程序,然後在xcode上重新運行它,或者如果我完全停止它的過程,它會更新表格,但我希望它立即更新表格 –
顯示一些代碼,以便某人可以告訴你實際問題在哪裏? –