所以，我正在尝试将我选择的单元格传递给之前的VC，每次单击任何行时，它总是只发送字符串“Apples”。我不知道为什么。有任何想法吗？ 注意：mySelectedCell是在ChoicesTableViewController的.h文件中初始化的NSString 我试图从
传递数据的.m文件@interface ChoicesTableViewController () <UITableViewDelegate, UITableViewDataSource>
@property (weak, nonatomic) IBOutlet UITableView *myTableView;
@property (strong, nonatomic) NSMutableArray *items;
@property (strong, nonatomic) NSMutableDictionary *alphabetizedItems;
@property (strong, nonatomic) NSArray *unsortedKeys;
@property (strong, nonatomic) NSArray *sortedKeys;
@end
@implementation ChoicesTableViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.myTableView.delegate = self;
self.myTableView.dataSource = self;
self.items = [[NSMutableArray alloc] init];
[self.items addObject:@"Apples"];
[self.items addObject:@"Bread"];
[self.items addObject:@"Butter"];
[self.items addObject:@"Cheese"];
[self.items addObject:@"Eggs"];
[self.items addObject:@"Grapes"];
[self.items addObject:@"Ice Cream"];
[self.items addObject:@"Milk"];
[self.items addObject:@"Oranges"];
[self.items addObject:@"Oreos"];
self.alphabetizedItems = [self alphabetizeItems:self.items];
}
//Segue if the item is tapped
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
self.mySelectedCell = [self.items objectAtIndex:indexPath.row];
[self performSegueWithIdentifier:@"unwindSegueAction" sender:self];
}
//unwind segue from add choice
- (IBAction)unwindSegueToChoices:(UIStoryboardSegue *)segue
{
AddChoiceViewController *sourceVC = segue.sourceViewController;
NSString *myNewItem = sourceVC.myTextField.text;
//NSString *myFinalString = [[myNewItem substringToIndex:1] capitalizedString];
NSString *stringCapitalized = [myNewItem capitalizedString];
[self.items addObject:stringCapitalized];
self.alphabetizedItems = [self alphabetizeItems:self.items];
//[self.arrayNames addObjectsFromArray:@[[MyDataChoices itemWithNewName:stringCapitalized]]];
[self.tableView reloadData];
}
//titles for talble view
#pragma mark Helper Methods
- (NSMutableDictionary *)alphabetizeItems:(NSArray *)items {
NSMutableDictionary *buffer = [[NSMutableDictionary alloc] init];
for (int i = 0; i < [items count]; i++) {
NSString *item = [items objectAtIndex:i];
NSString *firstLetter = [[item substringToIndex:1] uppercaseString];
if ([buffer objectForKey:firstLetter]) {
[(NSMutableArray *)[buffer objectForKey:firstLetter] addObject:item];
} else {
NSMutableArray *mutableArray = [[NSMutableArray alloc] initWithObjects:item, nil];
[buffer setObject:mutableArray forKey:firstLetter];
}
}
NSArray *keys = [buffer allKeys];
for (int j = 0; j < [keys count]; j++) {
NSString *key = [keys objectAtIndex:j];
[(NSMutableArray *)[buffer objectForKey:key] sortUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
}
NSMutableDictionary *result = [NSMutableDictionary dictionaryWithDictionary:buffer];
return result;
}
#pragma mark title indexing
-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
NSArray *keys = [[self.alphabetizedItems allKeys] sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
NSString *key = [keys objectAtIndex:section];
return key;
}
# pragma mark main table view
-(NSInteger) numberOfSectionsInTableView:(UITableView *) tableView
{
NSArray *keys = [self.alphabetizedItems allKeys];
return [keys count];
}
-(NSInteger) tableView:(UITableView *) tableView numberOfRowsInSection:(NSInteger)section
{
//return self.arrayNames.count;
self.unsortedKeys = [self.alphabetizedItems allKeys];
self.sortedKeys = [self.unsortedKeys sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
NSString *key = [self.sortedKeys objectAtIndex:section];
NSArray *itemsForSection = [self.alphabetizedItems objectForKey:key];
return [itemsForSection count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//MyDataChoices *currentRow = self.arrayNames[indexPath.row];
UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier:@"mainCell2" forIndexPath:indexPath];
//cell.textLabel.text = currentRow.myNameChoices;
NSString *key = [self.sortedKeys objectAtIndex:[indexPath section]];
NSArray *itemsForSection = [self.alphabetizedItems objectForKey:key];
NSString *item = [itemsForSection objectAtIndex:[indexPath row]];
[cell.textLabel setText:item];
return cell;
}
# pragma Mark delete slide button
//Delete Swipe Button
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not 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) {
NSArray *unsortedKeys = [self.alphabetizedItems allKeys];
NSArray *sortedKeys = [unsortedKeys sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
NSString *key = [sortedKeys objectAtIndex:[indexPath section]];
NSArray *itemsForSection = [self.alphabetizedItems objectForKey:key];
if (itemsForSection.count == 1) {
// Delete the whole section
[self.alphabetizedItems removeObjectForKey:key];
[tableView deleteSections:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:UITableViewRowAnimationFade];
} else {
// Delete the row from the data source
//int index = indexPath.row;
[self.alphabetizedItems removeObjectForKey:indexPath];
[tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
} else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
.m文件我将数据传递给
#import "ShoppingListTableViewTableViewController.h"
#import "myData.h"
#import "ChoicesTableViewController.h"
@interface ShoppingListTableViewTableViewController ()
@property (strong, nonatomic) NSMutableArray *itemData;
@end
@implementation ShoppingListTableViewTableViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.itemData = [[NSMutableArray alloc] init];
[self.itemData addObjectsFromArray:@[
[myData itemWithName:@"test"]]];
}
- (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 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return self.itemData.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
myData *currentRow = self.itemData[indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"mainCell" forIndexPath:indexPath];
cell.textLabel.text = currentRow.myName;
NSString *stringCount = [NSString stringWithFormat:@"%d", currentRow.count];
cell.detailTextLabel.text = stringCount;
cell.imageView.image = [UIImage imageNamed:@"Box-NoCheckMark.png"];
return cell;
}
//unwind segue data from choicestableviewcontroller
- (IBAction)unwindSegueAction:(UIStoryboardSegue *)segue
{
ChoicesTableViewController *vcb = (ChoicesTableViewController *)segue.sourceViewController;
BOOL isFound = false;
for (myData *item in self.itemData)
{
if( [item.myName isEqualToString:vcb.mySelectedCell])
{
item.count ++;
isFound = true;
break;
}
}
if(!isFound)
{
[self.itemData addObjectsFromArray:@[[myData itemWithName:vcb.mySelectedCell]]];
}
[self.tableView reloadData];
}
//Box checked
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
myData *check;
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"mainCell" forIndexPath:indexPath];
if(check.checkMark)
{
cell.imageView.image = [UIImage imageNamed:@"Box-NoCheckMark.png"];
check.checkMark = NO;
}
else
{
cell.imageView.image = [UIImage imageNamed:@"Box-CheckMark.png"];
check.checkMark = YES;
}
}
//Delete Button when Swiped to the left
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not 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) {
// Delete the row from the data source
int index = indexPath.row;
[self.itemData removeObjectAtIndex:index];
[tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
} else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
@end
答案 0 :(得分：-1)
您需要使用cellForRowAtIndexPath中didSelectRowAtIndexPath中使用的相同逻辑来获取正确的字符串;你不能只使用[self.items objectAtIndex：indexPath.row]。
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *key = [self.sortedKeys objectAtIndex:[indexPath section]];
NSArray *itemsForSection = [self.alphabetizedItems objectForKey:key];
self.mySelectedCell = [itemsForSection objectAtIndex:[indexPath row]];
[self performSegueWithIdentifier:@"unwindSegueAction" sender:self];
}