TableView的数据记录实现

   TableView的应用，真是有许多要讲的了，在我们做项目过程中，很多都用到TableVie，下面就讲到tableView实现商品购买，实现数据记录的方法。先看效果图。

    单元格的ib文件

   

//
//  ViewController.h
//  TableView数据记录
//
//  Created by 小黑 on 15-10-21.
//  Copyright (c) 2015年 Mac. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController


@end

//
//  ViewController.m
//  TableView数据记录
//
//  Created by 小黑 on 15-10-21.
//  Copyright (c) 2015年 Mac. All rights reserved.
//

#import "ViewController.h"
#import "NewTableView.h"

@interface ViewController ()

//tableview的数据
@property (nonatomic,strong)NSMutableArray *dataArray;


@property (nonatomic,strong)NewTableView *tableView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    _dataArray = [[NSMutableArray alloc] init];
    
    for (int i = 0; i < 100; i++) {
        
        NSString *str = @"aa";
        
        [_dataArray addObject:str];
    }

    
      
    
    _tableView = [[NewTableView alloc] initWithFrame:[UIScreen mainScreen].bounds];
    
    _tableView.dataArray = _dataArray;
    
    [self.view addSubview:_tableView];
    
}




- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

//
//  NewTableView.h
//  TableView数据记录
//
//  Created by Mac on 15-10-23.
//  Copyright (c) 2015年 Mac. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface NewTableView : UITableView<UITableViewDataSource,UITableViewDelegate>

@property (nonatomic,copy)NSArray *dataArray;

//记录cell上得数据
@property (nonatomic,strong)NSMutableArray *cellArray;

@end

//
//  NewTableView.m
//  TableView数据记录
//
//  Created by Mac on 15-10-23.
//  Copyright (c) 2015年 Mac. All rights reserved.
//

#import "NewTableView.h"
#import "NEwTableViewCell.h"


@implementation NewTableView

- (id)initWithFrame:(CGRect)frame{
    
    if (self = [super initWithFrame:frame]) {
        
        
        
        
        
    }
    
    return self;
}

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


- (void)setDataArray:(NSArray *)dataArray{
    
    _dataArray = dataArray;
    
    _cellArray = [[NSMutableArray alloc] init];
    
    for (int i = 0; i< _dataArray.count; i++) {
        
        
        NSNumber *nab = [NSNumber numberWithInt:0];
        
        NSString *num = [NSString stringWithFormat:@"%@",nab];
        
        [_cellArray addObject:num];
        
    }

    self.backgroundColor = [UIColor brownColor];
    self.delegate = self;
    self.dataSource = self;
    
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    
    return _dataArray.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    
    static NSString *Identifir = @"cell";
    
    NEwTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:Identifir];
    
    if (!cell) {
        
        cell = [[[NSBundle mainBundle] loadNibNamed:@"NEwTableViewCell" owner:self options:nil] lastObject];
        
    }
    
    cell.textF.text = _cellArray[indexPath.row];
    
    if ([cell.textF.text intValue] == 0) {
        
        cell.delet.hidden = YES;
        
    }else{
        
        cell.delet.hidden = NO;
    }
    
    
    
    [cell setTextFieldBlock:^(NSString *num) {
        
        if ([num intValue] <= 0) {
            
            int numInt = 0;
            num = [NSString stringWithFormat:@"%d",numInt];
        }
        
        _cellArray[indexPath.row] = num;
        
        NSIndexPath *newIndexPath = [NSIndexPath indexPathForRow:indexPath.row inSection:0];
        
        [self reloadRowsAtIndexPaths:@[newIndexPath] withRowAnimation:UITableViewRowAnimationNone];
        
    }];
    
    [cell setAddBlock:^(NSString *num) {
        
        _cellArray[indexPath.row] = num;
        
        NSIndexPath *newIndexPath = [NSIndexPath indexPathForRow:indexPath.row inSection:0];
        
        [self reloadRowsAtIndexPaths:@[newIndexPath] withRowAnimation:UITableViewRowAnimationNone];
        
    }];
    
    [cell setDeletBlock:^(NSString *num) {
        
        _cellArray[indexPath.row] = num;
        
        NSIndexPath *newIndexPath = [NSIndexPath indexPathForRow:indexPath.row inSection:0];
        
        [self reloadRowsAtIndexPaths:@[newIndexPath] withRowAnimation:UITableViewRowAnimationNone];
        
        
    }];
    
    cell.textLabel.text = [NSString stringWithFormat:@"%ld",indexPath.row];
    
    return cell;
}


- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    
    return 44;
}

@end

//
//  NEwTableViewCell.h
//  TableView数据记录
//
//  Created by 小黑 on 15-10-21.
//  Copyright (c) 2015年 Mac. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface NEwTableViewCell : UITableViewCell<UITextFieldDelegate>

@property (weak, nonatomic) IBOutlet UITextField *textF;



@property (weak, nonatomic) IBOutlet UIButton *add;

@property (weak, nonatomic) IBOutlet UIButton *delet;


@property (copy,nonatomic)void(^addBlock)(NSString *num);

@property (copy,nonatomic)void(^deletBlock)(NSString *num);

@property (copy,nonatomic)void(^textFieldBlock)(NSString *num);


@end

//
//  NEwTableViewCell.m
//  TableView数据记录
//
//  Created by 小黑 on 15-10-21.
//  Copyright (c) 2015年 Mac. All rights reserved.
//

#import "NEwTableViewCell.h"

@implementation NEwTableViewCell







- (IBAction)addButton:(UIButton *)sender {
    
    int num = [_textF.text intValue];

    NSString *numString = [NSString stringWithFormat:@"%@",[NSNumber numberWithInt:num+1]];
    
    _addBlock(numString);
    
    
}


- (IBAction)delegtButton:(UIButton *)sender {
    
    int num = [_textF.text intValue];
    
    int newNum = num - 1;

    if (newNum <= 0) {

        newNum = 0;
        
    }
    
    NSString *numString = [NSString stringWithFormat:@"%@",[NSNumber numberWithInt:newNum]];
    
    
    _deletBlock(numString);
    
    
}

- (void)textFieldDidBeginEditing:(UITextField *)textField{
    
    if ([_textF.text intValue] == 0) {
        
        _textF.text = nil;
        
    }
    
    
    
}


- (void)textFieldDidEndEditing:(UITextField *)textField{
    
    _textFieldBlock(textField.text);
    
    
    
}


//点击空白区域收起键盘
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    
    [_textF resignFirstResponder];
    
}
//点击return收起键盘
- (BOOL)textFieldShouldReturn:(UITextField *)textField{
    
   [_textF resignFirstResponder];
    
    return YES;
}



- (void)awakeFromNib {

    _textF.delegate = self;
    
}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
    [super setSelected:selected animated:animated];

    // Configure the view for the selected state
}

@end