objective-c - 如何从tableViewcontroller中调用变量？

Question

如题，继续小白学Ob-c，先谢各位大大！
想要把textfield中输入的变量存储在table中，附上代码：
在HWviewcontroller中的：
'''

import "HWViewController.h"

import "HWTableViewController.h"

@interface HWViewController ()
@property (nonatomic, strong) HWTableViewController *myTableViewController;

@property (strong, nonatomic) IBOutlet UISegmentedControl *mySegmentedControl;

@property (strong, nonatomic) IBOutlet UITextField *main;
@property (strong, nonatomic) IBOutlet UITextField *detail;
@property (strong, nonatomic) IBOutlet UIButton *addButton;
@property (strong, nonatomic) IBOutlet UIButton *showButton;
@property (strong, nonatomic) NSMutableDictionary *myItem;
@property (strong, nonatomic) NSString *combinedWord;
@end

@implementation HWViewController

• (void)viewDidLoad
  {
  [super viewDidLoad];
  // Do any additional setup after loading the view, typically from a nib.
  self.main.delegate = self;
  self.detail.delegate = self;
  self.myItem = [[NSMutableDictionary alloc] init];
  self.myTableViewController = [[HWTableViewController alloc] initWithStyle:UITableViewStyleGrouped];
  self.myTableViewController.view.frame = self.view.bounds;

}
- (BOOL)textFieldShouldReturn:(UITextField *)textField{

NSLog(@"return button pressed");

[self.main resignFirstResponder];
[self.detail resignFirstResponder];
return YES;

}
-(IBAction)addPressed:(id)sender {
NSString *item=self.main.text;
NSString *detail=self.detail.text;
NSString *combine=[NSString stringWithFormat:@"%@%@",item,detail];
self.combinedWord=combine;
NSMutableArray *myWordArray = [[NSMutableArray alloc] init];
[myWordArray addObject:item];
[myWordArray addObject:detail];
[self.myItem setObject:myWordArray forKey:combine];

}
-(IBAction)showPressed:(id)sender {
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:self.myTableViewController];

UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:@"Return"
                                                               style:UIBarButtonItemStyleDone target:self
                                                              action:@selector(dismissModalViewControllerAnimated:)];
[self.myTableViewController.navigationItem setLeftBarButtonItem:doneButton];


[self presentViewController:navController animated:YES completion:nil];

}

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

'''

然后tableviewcontroller的：
'''

import "HWTableViewController.h"

@interface HWTableViewController ()

@end

@implementation HWTableViewController

• (id)initWithStyle:(UITableViewStyle)style
  {
  self = [super initWithStyle:style];
  if (self) {
  // Custom initialization
  }
  return self;
  }

• (void)viewDidLoad
  {
  [super viewDidLoad];

  // Uncomment the following line to preserve selection between presentations.
  // self.clearsSelectionOnViewWillAppear = NO;

  // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
  // self.navigationItem.rightBarButtonItem = self.editButtonItem;

}

• (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 2;
  }

• (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
  {

  // Return the number of rows in the section.
  return 2;
  }

• (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
  {
  UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];

  if (cell == nil) {
  cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"cell"];
  }

  int r = indexPath.row;
  int s = indexPath.section;
  //这里是有问题的敌方，貌似不行
  cell.textLabel.text = 这里想是self.main
  cell.detailTextLabel.text = 这里像是self.detail

  if (r%2 == 0) {
  cell.backgroundColor = [UIColor redColor];
  }
  else{
  cell.backgroundColor = [UIColor whiteColor];
  }

  return cell;
  }

• (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
  {
  int r = indexPath.row;
  int s = indexPath.section;
  NSString *string = [NSString stringWithFormat:@"Section %d, Row %d", s, r];
  NSLog(@"%@", string);

  [tableView deselectRowAtIndexPath:indexPath animated:YES];

  UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Selection" message:@"You have selected a row!" delegate:self cancelButtonTitle:@"Okay" otherButtonTitles:@"Thatz not okay", nil];

  [alertView show];
  '''

Answer 1

cell.textLabel.text = 这里想是self.main
cell.detailTextLabel.text = 这里像是self.detail
这样显然是不行的,因为你的tableview里面根本就没有self.main,self.detail这2个值,
这个其实想解决有好几种方式,其中最简单的做法是在tableview中声明2个属性,跳转控制器之前把tableview的2个属性赋值.(记住,tableview有代理和数据源)

退出键盘有一种更方便的方式
[self.view endEditing:YES];