Iphone 如何对用作计算器的表视图的可重用自定义单元格的内容求和

我构建了一个带有自定义表视图单元格的表视图，其中每个单元格都有几个UITextFields，允许用户输入提供计算的数字。该单元格有一个提供该单元格结果的UITextField小计

我的问题是，我想对该单元格以及用户使用的每个附加单元格进行小计，并在不同的UIView上提供总计

我不知道如何获取每个单元格的每个小计的值，而且，我如何知道用户使用了多少单元格，以及所有这些，以便在不同的视图中为用户提供总计

实现这一目标的最佳方式是什么

这是代码

我想添加新的单元格，并能够将它们添加到计算中。但每个单元格将保存用户提供的不同值

最好的

#导入
@接口处理器：UIViewController{
UITextField*totalField；
UITextField*差异字段；
UITextField*productField；
UITextField*价格1字段；
UITextField*折扣1p1Field；
UITextField*折扣2p1Field；
UITextField*小计1字段；
UITextField*product2Field；
UITextField*price2Field；
UITextField*折扣1p2field；
UITextField*折扣2p2field；
UITextField*小计2字段；
}
@属性（非原子，保留）IBUITextField*totalField；
@属性（非原子，保留）IBOutlet UITextField*differenceField；
@属性（非原子，保留）IBOutlet UITextField*productField；
@属性（非原子，保留）IBOutlet UITextField*price1Field；
@属性（非原子，保留）IBOutlet UITextField*折扣1p1Field；
@属性（非原子，保留）IBOutlet UITextField*折扣2p1Field；
@属性（非原子，保留）IBOutlet UITextField*小计1字段；
@属性（非原子，保留）IBOutlet UITextField*product2Field；
@属性（非原子，保留）IBOutlet UITextField*price2Field；
@属性（非原子，保留）IBOutlet UITextField*折扣1p2Field；
@属性（非原子，保留）IBOutlet UITextField*折扣2p2Field；
@属性（非原子，保留）IBOutlet UITextField*小计2字段；
-（iAction）计算选项：（id）发送方；
-（iAction）移除键盘；
@结束
#导入“ProCalculator.h”
#导入“ProductCell.h”
@实现前计算程序
@综合总字段、差异字段、产品字段、价格字段、折扣1字段、折扣2字段、小计1字段；
@综合产品2字段、价格2字段、折扣1字段、折扣2字段、小计2字段；
-（iAction）计算选项：（id）发送方
{
//计算第一个单元格内的乘积1
NSString*firstPrice=self.price1Field.text；
NSString*discount1P1=self.discount1P1Field.text；
NSString*折扣2P1=self.discount2P1Field.text；
双倍小计1，含折扣1；
双倍小计1，不含折扣2；
double firstPrice double=[firstPrice doubleValue]；
双重折扣1p1double=[折扣1p1doublevalue]；
双折扣2P1双值=[折扣2P1双值]；
双百分比折扣1p1；
双百分比折扣2P1；
双重储蓄1p1；
双重储蓄2p1；
百分比折扣1p1=折扣1p1倍/100；
百分比折扣2P1=折扣2P1倍/100；
储蓄1p1=首次价格双倍*百分比折扣1p1；
小计1含折扣1=第一价格双倍储蓄1p1；
储蓄2p1=小计1含折扣1*百分比折扣2p1；
小计1带折扣2=小计1带折扣1-储蓄2p1；
NSString*finalSubtotal1=[[NSString alloc]initWithFormat:@“$%.02f”，小计1含折扣2]；
self.subtotal1Field.text=finalSubtotal1；
//在第二个单元格中计算产品2（不是构建更多的单元格，我需要从用户输入中获取信息来创建单元格，存储来自单元格的信息并将其添加到计算中）。
NSString*secondPrice=self.price1Field.text；
NSString*折扣1P2=self.discount1P2Field.text；
NSString*折扣2P2=self.discount2P2Field.text；
双倍小计2，不含折扣1；
双倍小计2，不含折扣2；
double secondPrice double=[secondPrice doubleValue]；
双重折扣1p2double=[折扣1p2doublevalue]；
双重折扣2p2double=[折扣2p2doublevalue]；
双百分比折扣1 P2；
双百分比折扣2P2；
双重储蓄1p2；
双重储蓄2p2；
百分比折扣1P2=折扣1P2倍/100；
百分比折扣2P2=折扣2P2倍/100；
储蓄1p2=二次价格双倍*百分比折扣1p2；
小计2含折扣1=二次价格双倍储蓄1p2；
储蓄2p2=小计2（含折扣1）*百分比折扣2p2；
小计2带折扣2=小计2带折扣1-储蓄2p2；
NSString*finalSubtotal2=[[NSString alloc]initWithFormat:@“$%.02f”，小计2 WithDiscount2]；
self.subtotal1Field.text=最终subtotal2；
//计算总数
双倍总额；
总金额=小计1带折扣2+小计2带折扣2；
NSString*总=[[NSString alloc]initWithFormat:@“$%.02f”，totalAmount]；
self.totalField.text=总数；
//计算节省下来的钱
节省双倍的钱；
存钱=储蓄1p1+储蓄2p1+储蓄1p2+储蓄2p2；
NSString*theMoneySaved=[[NSString alloc]initWithFormat:@“$%.02f”，moneySaved]；
self.differenceField.text=货币已保存；
}
-（iAction）移除键盘
{
[self.productField辞职FirstResponder]；
[self.price1Field辞职第一响应者]；
[self.discount1P1Field辞职第一响应者]；
[self.discount2P1Field-resignFirstResponder]；
}
-（id）initWithNibName:（NSString*）nibNameOrNil bundle:（NSBundle*）nibBundleOrNil
{
self=[super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]；
如果（自我）{
//自定义初始化
}
回归自我；
}
-（无效）解除锁定
{
[super dealoc]；
}
-（无效）未收到记忆警告
{
//如果视图没有superview，则释放该视图。
[超级记忆警告]；
//释放所有未使用的缓存数据、图像等。
}
#pragma标记-视图生命周期
-（无效）viewDidLoad
{
[超级视图下载]；
//从nib加载视图后，执行任何其他设置。
}
-（无效）视图卸载
{
[超级视频下载]；
//释放任何保留的
#import <UIKit/UIKit.h>


@interface ProCalculator : UIViewController <UITableViewDelegate, UITableViewDataSource>      {

UITextField *totalField;
UITextField *differenceField;

UITextField *productField;
UITextField *price1Field;
UITextField *discount1P1Field;
UITextField *discount2P1Field;
UITextField *subtotal1Field;

UITextField *product2Field;
UITextField *price2Field;
UITextField *discount1P2Field;
UITextField *discount2P2Field;
UITextField *subtotal2Field;

}

@property (nonatomic, retain) IBOutlet UITextField *totalField;
@property (nonatomic, retain) IBOutlet UITextField *differenceField;

@property (nonatomic, retain) IBOutlet UITextField *productField;
@property (nonatomic, retain) IBOutlet UITextField *price1Field;
@property (nonatomic, retain) IBOutlet UITextField *discount1P1Field;
@property (nonatomic, retain) IBOutlet UITextField *discount2P1Field;
@property (nonatomic, retain) IBOutlet UITextField *subtotal1Field;

@property (nonatomic, retain) IBOutlet UITextField *product2Field;
@property (nonatomic, retain) IBOutlet UITextField *price2Field;
@property (nonatomic, retain) IBOutlet UITextField *discount1P2Field;
@property (nonatomic, retain) IBOutlet UITextField *discount2P2Field;
@property (nonatomic, retain) IBOutlet UITextField *subtotal2Field;


-(IBAction)calculateDiscounts:(id)sender;
-(IBAction)removeKeyboard;


@end


#import "ProCalculator.h"
#import "ProductCell.h"


@implementation ProCalculator

@synthesize totalField, differenceField, productField, price1Field, discount1P1Field,     discount2P1Field, subtotal1Field;
@synthesize product2Field, price2Field, discount1P2Field, discount2P2Field, subtotal2Field;


-(IBAction)calculateDiscounts:(id)sender
{

//Calculate product 1 within first Cell

NSString *firstPrice = self.price1Field.text;
NSString *discount1P1 = self.discount1P1Field.text;
NSString *discount2P1 = self.discount2P1Field.text;

double subtotal1WithDiscount1;
double subtotal1WithDiscount2;
double firstPriceDouble = [firstPrice doubleValue];
double discount1P1Double = [discount1P1 doubleValue];
double discount2P1Double = [discount2P1 doubleValue];
double percentageDiscount1P1;
double percentageDiscount2P1;
double savings1P1;
double savings2P1;

percentageDiscount1P1 = discount1P1Double / 100; 
percentageDiscount2P1 = discount2P1Double / 100;
savings1P1 = firstPriceDouble * percentageDiscount1P1;
subtotal1WithDiscount1 = firstPriceDouble - savings1P1;
savings2P1 = subtotal1WithDiscount1 * percentageDiscount2P1;
subtotal1WithDiscount2 = subtotal1WithDiscount1 - savings2P1;

NSString *finalSubtotal1 = [[NSString alloc] initWithFormat:@"$ %.02f",   subtotal1WithDiscount2];

self.subtotal1Field.text = finalSubtotal1;


//Calculate product 2 within second Cell (Instead of Building more cells, I need to get information from User Input to create Cells and store information from them and add them to the calculation. 

NSString *secondPrice = self.price1Field.text;
NSString *discount1P2 = self.discount1P2Field.text;
NSString *discount2P2 = self.discount2P2Field.text;

double subtotal2WithDiscount1;
double subtotal2WithDiscount2;
double secondPriceDouble = [secondPrice doubleValue];
double discount1P2Double = [discount1P2 doubleValue];
double discount2P2Double = [discount2P2 doubleValue];
double percentageDiscount1P2;
double percentageDiscount2P2;
double savings1P2;
double savings2P2;

percentageDiscount1P2 = discount1P2Double / 100; 
percentageDiscount2P2 = discount2P2Double / 100;
savings1P2 = secondPriceDouble * percentageDiscount1P2;
subtotal2WithDiscount1 = secondPriceDouble - savings1P2;
savings2P2 = subtotal2WithDiscount1 * percentageDiscount2P2;
subtotal2WithDiscount2 = subtotal2WithDiscount1 - savings2P2;

NSString *finalSubtotal2 = [[NSString alloc] initWithFormat:@"$ %.02f", subtotal2WithDiscount2];

self.subtotal1Field.text = finalSubtotal2;



//Calculate Total

double totalAmount;
totalAmount = subtotal1WithDiscount2 + subtotal2WithDiscount2;
NSString *theTotal = [[NSString alloc] initWithFormat:@"$ %.02f", totalAmount];
self.totalField.text = theTotal;

//Calculate Money Saved

double moneySaved;
moneySaved = savings1P1 + savings2P1 + savings1P2 + savings2P2;
NSString *theMoneySaved = [[NSString alloc] initWithFormat:@"$ %.02f", moneySaved];
self.differenceField.text = theMoneySaved;


}

-(IBAction)removeKeyboard
{
[self.productField resignFirstResponder];
[self.price1Field resignFirstResponder];
[self.discount1P1Field resignFirstResponder];
[self.discount2P1Field resignFirstResponder];

}

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
    // Custom initialization
}
return self;
}

- (void)dealloc
{
[super dealloc];
}

- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];

// Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}

- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

#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 1;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"ProductTableViewCell";


ProductCell *cell = (ProductCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];

if (cell == nil) {

    NSArray *topLabel = [[NSBundle mainBundle] loadNibNamed:@"ProductTableViewCell" owner:self options:nil];

    for (id currentObject in topLabel) {

        if ([currentObject isKindOfClass:[ProductCell class]]) {
            cell = (ProductCell *) currentObject;
            break;

        }

    }

}



return cell;
}





@end

@interface TableViewCellModel : NSObject {

  NSString * _valueOfTextfield;
}

@property (nonatomic, retain) NSString * valueOfTextfield;

@end

@implementation TableViewCellModel

@synthesize valueOfTextfield = _valueOfTextfield;

@end

@interface TableViewModel : NSObject {
  int _index;
  NSString * _textFieldValue;
}

@property (nonatomic, assign) int index;
@property (nonatomic, retain) NSString * textFieldValue;

@end

#import "TableViewModel.h"

@implementation TableViewModel

@synthesize index = _index;
@synthesize textFieldValue = _textFieldValue;

@end

#import <UIKit/UIKit.h>
@class TableViewModel;

@interface TableViewCell : UITableViewCell {
  IBOutlet UILabel * _label;
}

@property (nonatomic, retain) TableViewModel * tableViewModel;

- (IBAction)useTextField;

@end

#import "TableViewCell.h"
#import "TableViewModel.h"
#import "AppDelegate.h"

@implementation TableViewCell

- (void)dealloc; {
    [super dealloc];
}

- (void)setTableViewModel:(TableViewModel *)tableViewModel; {
  _label.text = [tableViewModel textFieldValue];
}

- (TableViewModel *)tableViewModel; {
  return nil;
}

- (IBAction)useTextField; {
  [[AppDelegate appDelegate] useTextFieldForIndex:[self.tableViewModel index]];
}

@end

#import <UIKit/UIKit.h>
@class TableViewCell;

@interface ViewController : UIViewController <UITableViewDelegate, UITableViewDataSource, UITextFieldDelegate> {

  int _index;
  NSMutableArray * _items;
  IBOutlet TableViewCell * _cell;
  IBOutlet UITableView * _tableView;
  IBOutlet UITextField * _textField;
}

- (void)useTextFieldForIndex:(int)aIndex;

@end

#import "ViewController.h"
#import "TableViewModel.h"
#import "TableViewCell.h"

@implementation ViewController

- (void)dealloc; {
  [_items release];
  [super dealloc];
}

#pragma mark - View lifecycle

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad; {
  [super viewDidLoad];
  // This is an example of how to fill in the _items array with Models
  _items = [[NSMutableArray alloc] init];

  TableViewModel * model = [[TableViewModel alloc] init];
  model.textFieldValue = @"1";
  model.index = 0;

  [_items addObject:model];
  [model release];
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField; {
  TableViewModel * model = [_items objectAtIndex:_index];
  model.textFieldValue = [_textField.text retain];
  [_items replaceObjectAtIndex:_index withObject:model];
  [_tableView reloadData];
  [_textField resignFirstResponder];
  return YES;
}

// Customize the number of sections in the table view.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView; {
  return 1;
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath; {
  return 100;//This should be whatever the height of the cell is!
}

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

// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath; {

  NSString * cellIdentifier = @"TableViewCell";
  TableViewCell * cell = (TableViewCell *)[tableView dequeueReusableCellWithIdentifier:cellIdentifier];

  if (cell == nil) {

    [[NSBundle mainBundle] loadNibNamed:cellIdentifier owner:self options:nil]; // hooks up _cell for us
    cell = _cell;
  }

  cell.tableViewModel = ((TableViewModel *) [_items objectAtIndex:indexPath.row]);

  return cell;
}

- (void)useTextFieldForIndex:(int)aIndex; {
  _index = aIndex;
  [_textField becomeFirstResponder];
}

@end

+ (AppDelegate *)appDelegate; {
  return (AppDelegate *)[[UIApplication sharedApplication] delegate];
}

- (void)useTextFieldForIndex:(int)aIndex; {
  [self.viewController useTextFieldForIndex:aIndex];
}

double sum = 0;

for(TableViewCellModel * model in _items){
  sum += [model.valueOfTextfield doubleValue];
}