Ios 我的代表没有'；从表视图切换回根视图时不工作

这是我的citylistTableView控制器，当我按下一个单元格并将所选单元格的文本发送回view控制器的第一个单元格时，我正试图返回ViewController

#import <UIKit/UIKit.h>
//#import "ViewController.h"
@class CityListTableViewController;

@protocol CityListTableViewControllerDelegate <NSObject>
-(void)done:(CityListTableViewController*)controllor selectedCity:(UITableViewCell*)citySelected;
@end

@interface CityListTableViewController : UITableViewController{
    NSMutableArray* cities;
}
@property (nonatomic,weak) id<CityListTableViewControllerDelegate> cityDelegate;

@end

下一步：

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这就是全部代码，我没有使用segue从一个视图转换到另一个视图。有人能帮我吗？

你需要在这里纠正两件事：

不要将单元格传回，只需将您的城市名称作为NSString传递即可

在rootViewController中，将新城市添加到数据源中

重新加载表格 这将是简单和快速的

#import "CityListTableViewController.h"

@interface CityListTableViewController ()

@end

@implementation CityListTableViewController

- (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;
    cities = [[NSMutableArray alloc] init];
    [self initCities];
}

-(void)initCities{
    [cities addObject:@"洛杉矶"];
    [cities addObject:@"旧金山"];
    [cities addObject:@"芝加哥"];
    [cities addObject:@"西雅图"];
    [cities addObject:@"华盛顿"];
    [cities addObject:@"纽约"];
    [cities addObject:@"迈阿密"];
    [cities addObject:@"圣地亚哥"];
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
#warning Incomplete implementation, return the number of sections
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
#warning Incomplete implementation, return the number of rows
    return [cities count];
}


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

    // Configure the cell...
    cell.textLabel.text = [cities objectAtIndex:indexPath.row];

    return cell;
}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
    NSLog(cell.textLabel.text);
    [self.cityDelegate done:self selectedCity:cell];

    //go back to root view controllor
    [self.navigationController popToRootViewControllerAnimated:YES];


}


/*
// 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) {
        // Delete the row from the data source
        [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
    }   
}
*/

/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {
}
*/

/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
    // Return NO if you do not want the item to be re-orderable.
    return YES;
}
*/

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end

#import <UIKit/UIKit.h>
#import "CityListTableViewController.h"

@interface ViewController : UIViewController<UITableViewDelegate,UITableViewDataSource,UITabBarDelegate,CityListTableViewControllerDelegate>{

    IBOutlet UITableView *setTourTableView;
    NSMutableArray *tourSetting;



}

@end

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    // Generate a black tab bar

    // Set the selected icons and text tint color

    self.view.backgroundColor = [UIColor colorWithRed:0.94 green:0.93 blue:0.93 alpha:1.0];
    setTourTableView.backgroundColor = [UIColor colorWithRed:0.94 green:0.93 blue:0.93 alpha:1.0];


    tourSetting = [[NSMutableArray alloc] initWithObjects:@"城市", @"日期", @"景点", @"语种",@"人数",nil];

    //template for selecting tabbar item

}

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

    return [tourSetting count];
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"toursetting"];

    cell.textLabel.text = [tourSetting objectAtIndex:indexPath.row];
    return cell;
}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
    NSLog(cell.textLabel.text);
    if([cell.detailTextLabel.text  isEqual: @""]){
        NSLog(@"is null");
    }
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    if(indexPath.row == 0){
        UITableViewController *viewController = [storyboard instantiateViewControllerWithIdentifier:@"city"];
        [[self navigationController] pushViewController:viewController animated:YES];
    }
    else if(indexPath.row == 1){
        UITableViewController *viewController = [storyboard instantiateViewControllerWithIdentifier:@"data"];
        [[self navigationController] pushViewController:viewController animated:YES];
    }
    else if(indexPath.row == 2){
        UITableViewController *viewController = [storyboard instantiateViewControllerWithIdentifier:@"views"];
        [[self navigationController] pushViewController:viewController animated:YES];
    }
    else if(indexPath.row == 3){
        UIViewController *viewController = [storyboard instantiateViewControllerWithIdentifier:@"language"];
        [[self navigationController] pushViewController:viewController animated:YES];
    }
    else if(indexPath.row == 4){
        UIViewController *viewController = [storyboard instantiateViewControllerWithIdentifier:@"party"];
        [[self navigationController] pushViewController:viewController animated:YES];
    }


}

-(void)setTabBarItem:(UITabBarItem *)tabBarItem{

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

/********below are delegate method*****************/
-(void)done:(CityListTableViewController *)controllor selectedCity :(UITableViewCell*)citySelected{

    NSIndexPath* path = [NSIndexPath indexPathForRow:0 inSection:0];
    [setTourTableView cellForRowAtIndexPath:path].detailTextLabel.text = citySelected.textLabel.text;
    NSLog(@"dddd");
}

@end