存儲數據

Question

你好我有此觀點的添加或刪除車中的項目，我想節省的plist項目名稱，說明選擇的數據，並通過用戶點擊結賬所有選定項目後，選擇數量將顯示在下一個屏幕上，我可以這樣做嗎？

的TableView委託方法： -

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 
{ 
    return [dataArray count]; 
} 

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    CustomTableCell *cell = [_tableView dequeueReusableCellWithIdentifier:@"Cell"]; 
    Product *object = [dataArray objectAtIndex:indexPath.row]; 
    cell.nameLabel.text= object.iD; 
    cell.descLabel.text=object.desc; 
    NSString *str = [NSString stringWithFormat:@"%@%@",@"₹",object.price]; 
    cell.priceLabel.text = str; 
    cell.selectionStyle = UITableViewCellSelectionStyleNone; 
    cell.addBtn.tag = indexPath.row; 
    cell.removeBtn.tag = indexPath.row; 
    cell.count = [NSNumber numberWithInt:j]; 
    cell.quantityLbl.text = [NSString stringWithFormat:@"%@",cell.count]; 
    cell.quantityLbl.layer.cornerRadius =YES; 
    cell.quantityLbl.layer.borderWidth = 1.0; 
    return cell; 
} 

添加按鈕

-(IBAction)addButton:(id)sender 
{ 
CustomTableCell *cell; 
UIButton *button3=(UIButton *)sender; 
Product *object = [dataArray objectAtIndex:button3.tag]; 
if(SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")) 
{ 
    cell = (CustomTableCell*)((UIButton*)sender).superview.superview.superview; 
} 
else{ 
    cell = (CustomTableCell*)((UIButton*)sender).superview.superview.superview.superview; 
} 
cell.quantityLbl.text = [NSString stringWithFormat:@"%d",[cell.quantityLbl.text intValue]+1]; 
i=i+1; 
indexLbl.text = [NSString stringWithFormat:@"%@",[NSNumber numberWithInt:i]]; 
} 

在刪除按鈕

-(IBAction)removeButton:(id)sender 
{ 
CustomTableCell *cell; 
// check device version 
if(SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")) 
{ 
    cell = (CustomTableCell*)((UIButton*)sender).superview.superview.superview; 
} 
else{ 
    cell = (CustomTableCell*)((UIButton*)sender).superview.superview.superview.superview; 
} 

if ([cell.quantityLbl.text intValue] > 0) 
{ 
    cell.quantityLbl.text = [NSString stringWithFormat:@"%d",[cell.quantityLbl.text intValue]-1]; 
    i=i-1; 
} 
indexLbl.text = [NSString stringWithFormat:@"%@",[NSNumber numberWithInt:i]]; 
} 

Answer 1

創建NSMutableDictionary命名爲currentOrderDict並將其保存在您的班級中。

在addButton點擊後，執行如下操作。

if([currentOrderDict objectForKey:cell.nameLabel.text]) 
{ 
// get the NSNumber for this key and ++ it. 
} 
else 
{ 
// this is the first time you are adding this item to this dictionary, so create an NSNumber and add it 
NSNumber oneNumber = [NSNumber numberWithInt:1]; 
[currentOrderDict setObject:oneNumber forKey:cell.nameLabel.text]; 
} 

做需要在刪除按鈕以及。