Ios 在ViewControllerB和ViewControllerA之间传递数据，未调用委托

我尝试使用委托但未成功，未调用该委托。 这是我的代表代码：

设置代理（ViewControllerB）

VC A采用该协议

@interface AddKid () <MZFormSheetBackgroundWindowDelegate,SearchGardenDelegate>

@end

@implementation AddKid 

在VC A上实现协议方法：

- (void)addItemViewController:(SearchGardenTable *)controller didFinishWithGardenID:(NSString *)gardenID gardenName:(NSString*)gardenName andCityName:(NSString*)cityName
{
    _kidGardenID = gardenID;
    _gardenName.text = gardenName;
    _kidCity.text = cityName;

}

编辑

ViewController B didSelectRowAtIndexPath: code

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

        NSArray *temp = [_responseDict valueForKey:@"ID"];
        NSArray *temp1 = [_responseDict valueForKey:@"name"];

        _kidGaedenID  = [temp objectAtIndex:indexPath.row];
        _kidGardenName = [temp1 objectAtIndex:indexPath.row];



        [[self delegate] addItemViewController:self didFinishWithGardenID:_kidGaedenID gardenName:_kidGardenName andCityName:_kidCityName];

        [self mz_dismissFormSheetControllerAnimated:YES completionHandler:^(MZFormSheetController *formSheetController) {

//dismiss the popup view which i create it VC A with that gitHub package:
https://github.com/m1entus/MZFormSheetController/issues/98

        }];

编辑2 显示ViewControllerB的代码：

- (IBAction)chooseGardenAndCityBtn:(id)sender {
    UIViewController *vc = [self.storyboard instantiateViewControllerWithIdentifier:@"modal"];

    MZFormSheetController *formSheet = [[MZFormSheetController alloc] initWithViewController:vc];

    formSheet.presentedFormSheetSize = CGSizeMake(300, 298);
    //    formSheet.transitionStyle = MZFormSheetTransitionStyleSlideFromTop;
    formSheet.shadowRadius = 2.0;
    formSheet.shadowOpacity = 0.3;
    formSheet.shouldDismissOnBackgroundViewTap = YES;
    formSheet.shouldCenterVertically = YES;
    formSheet.movementWhenKeyboardAppears = MZFormSheetWhenKeyboardAppearsCenterVertically;
    // formSheet.keyboardMovementStyle = MZFormSheetKeyboardMovementStyleMoveToTop;
    // formSheet.keyboardMovementStyle = MZFormSheetKeyboardMovementStyleMoveToTopInset;
    // formSheet.landscapeTopInset = 50;
    // formSheet.portraitTopInset = 100;

    __weak MZFormSheetController *weakFormSheet = formSheet;


    // If you want to animate status bar use this code
    formSheet.didTapOnBackgroundViewCompletionHandler = ^(CGPoint location) {
        UINavigationController *navController = (UINavigationController *)weakFormSheet.presentedFSViewController;
        if ([navController.topViewController isKindOfClass:[SearchCityTable class]]) {
            SearchCityTable *mzvc = (SearchCityTable *)navController.topViewController;
            mzvc.showStatusBar = NO;
        }


        [UIView animateWithDuration:0.3 animations:^{
            if ([weakFormSheet respondsToSelector:@selector(setNeedsStatusBarAppearanceUpdate)]) {
                [weakFormSheet setNeedsStatusBarAppearanceUpdate];
            }
        }];
    };

    formSheet.willPresentCompletionHandler = ^(UIViewController *presentedFSViewController) {
        // Passing data
        UINavigationController *navController = (UINavigationController *)presentedFSViewController;
        navController.topViewController.title = @"בחר עיר";
    };
    formSheet.transitionStyle = MZFormSheetTransitionStyleCustom;

    [MZFormSheetController sharedBackgroundWindow].formSheetBackgroundWindowDelegate = self;

    [self mz_presentFormSheetController:formSheet animated:YES completionHandler:^(MZFormSheetController *formSheetController) {

    }];



}

编辑

---

请出示您的VC B初始化

在拨打此电话之前，请确保self.searchGarden已初始化

self.searchGarden.delegate = self; // in VC A viewDidLoad.

---

请出示您的VC B初始化

在拨打此电话之前，请确保self.searchGarden已初始化

self.searchGarden.delegate = self; // in VC A viewDidLoad.

---

远大目标，但您是否尝试过：

 [[self delegate] addItemViewController:self didFinishWithGardenID:_kidGaedenID gardenName:_kidGardenName andCityName:_kidCityName]];

而不是

 [self.delegate addItemViewController:self didFinishWithGardenID:_kidGaedenID gardenName:_kidGardenName andCityName:_kidCityName];

---

远大目标，但您是否尝试过：

 [[self delegate] addItemViewController:self didFinishWithGardenID:_kidGaedenID gardenName:_kidGardenName andCityName:_kidCityName]];

而不是

 [self.delegate addItemViewController:self didFinishWithGardenID:_kidGaedenID gardenName:_kidGardenName andCityName:_kidCityName];

你在干什么

self.searchGarden = [[SearchGardenTable alloc]init];

但是你说你在故事板中有你的视图控制器。这让我想到self.searchGarden在viewDidLoad:的角度与故事板中的对象不同

当您准备推送VC B时或在执行搜索之前（如果您使用的是segue），应将一个对象指定给self.searchGarden

编辑

ViewController B didSelectRowAtIndexPath: code

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

        NSArray *temp = [_responseDict valueForKey:@"ID"];
        NSArray *temp1 = [_responseDict valueForKey:@"name"];

        _kidGaedenID  = [temp objectAtIndex:indexPath.row];
        _kidGardenName = [temp1 objectAtIndex:indexPath.row];



        [[self delegate] addItemViewController:self didFinishWithGardenID:_kidGaedenID gardenName:_kidGardenName andCityName:_kidCityName];

        [self mz_dismissFormSheetControllerAnimated:YES completionHandler:^(MZFormSheetController *formSheetController) {

//dismiss the popup view which i create it VC A with that gitHub package:
https://github.com/m1entus/MZFormSheetController/issues/98

        }];

根据你的代码，我假设

UIViewController *vc = [self.storyboard instantiateViewControllerWithIdentifier:@"modal"];

是你的VC B，所以你需要做VC.delegate=self； 请记住，您的vc必须是vc B类型，在您的情况下，它是可搜索的

编辑2

考虑到当前的设置，我现在想到的最快的解决方案是NSNotification。从您的VC B发送通知：

[[NSNotificationCenter defaultCenter] postNotificationName:@"userDidTapOnCell" object:nil userInfo:dictionaryOfObjects];

使用从模型检索的对象初始化对象字典，如：

NSDictionary *dictionary = @{ @"gardenID": _kidGaedenID, @"gardenName": _kidGardenName };

在VC A中，您将自己添加为viewDidLoad通知的观察者：

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(gardenInfoDidComeBack:) name:@"userDidTapOnCell" object:nil];

并实施该方法：

- (void)gardenInfoDidComeBack:(NSNotification *)notification {
    NSDictionary *userInfo = notification.userInfo;
    // retrieve the kidGardenID and kidGardenName from the dict and use them as you whish.
}

希望这能帮助你完成任务。您的导航架构可能不是最好的，但这超出了本主题的范围，本主题已经做得够多了。

您正在做什么

self.searchGarden = [[SearchGardenTable alloc]init];

但是你说你在故事板中有你的视图控制器。这让我想到self.searchGarden在viewDidLoad:的角度与故事板中的对象不同

当您准备推送VC B时或在执行搜索之前（如果您使用的是segue），应将一个对象指定给self.searchGarden

编辑

ViewController B didSelectRowAtIndexPath: code

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

        NSArray *temp = [_responseDict valueForKey:@"ID"];
        NSArray *temp1 = [_responseDict valueForKey:@"name"];

        _kidGaedenID  = [temp objectAtIndex:indexPath.row];
        _kidGardenName = [temp1 objectAtIndex:indexPath.row];



        [[self delegate] addItemViewController:self didFinishWithGardenID:_kidGaedenID gardenName:_kidGardenName andCityName:_kidCityName];

        [self mz_dismissFormSheetControllerAnimated:YES completionHandler:^(MZFormSheetController *formSheetController) {

//dismiss the popup view which i create it VC A with that gitHub package:
https://github.com/m1entus/MZFormSheetController/issues/98

        }];

根据你的代码，我假设

UIViewController *vc = [self.storyboard instantiateViewControllerWithIdentifier:@"modal"];

是你的VC B，所以你需要做VC.delegate=self； 请记住，您的vc必须是vc B类型，在您的情况下，它是可搜索的

编辑2

考虑到当前的设置，我现在想到的最快的解决方案是NSNotification。从您的VC B发送通知：

[[NSNotificationCenter defaultCenter] postNotificationName:@"userDidTapOnCell" object:nil userInfo:dictionaryOfObjects];

使用从模型检索的对象初始化对象字典，如：

NSDictionary *dictionary = @{ @"gardenID": _kidGaedenID, @"gardenName": _kidGardenName };

在VC A中，您将自己添加为viewDidLoad通知的观察者：

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(gardenInfoDidComeBack:) name:@"userDidTapOnCell" object:nil];

并实施该方法：

- (void)gardenInfoDidComeBack:(NSNotification *)notification {
    NSDictionary *userInfo = notification.userInfo;
    // retrieve the kidGardenID and kidGardenName from the dict and use them as you whish.
}

---

希望这能帮助你完成任务。可能您的导航架构不是最好的，但这超出了本主题的范围，本主题已经做得够多了。

我从您的查询和关注点中了解到，我发现了一些东西

   UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];

    searchVC = (ControllerA *)[storyboard instantiateViewControllerWithIdentifier:@"controllerA"];
    searchVC.delegate = self;

    [self.navigationController pushViewController:searchVC animated:YES];

---

希望这能对您有所帮助：）

从您的询问和担忧中我了解到了一些东西

   UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];

    searchVC = (ControllerA *)[storyboard instantiateViewControllerWithIdentifier:@"controllerA"];
    searchVC.delegate = self;

    [self.navigationController pushViewController:searchVC animated:YES];

---

---

希望这能对您有所帮助：）

您指定VC A采用SearchGardenDelegate协议了吗？是的，我指定了。。请参阅我的编辑。您从哪里发送委托方法的消息？您的VC B类中的哪个方法？其中有[self.delegate addItemViewController:self didFinishWithGardenID:_kidGaedIdGardenName:_kidGardenNameand CityName:_kidCityName]；didSelectRowAtIndexPath:tableview方法您指定VC A采用SearchGardenDelegate协议了吗？是的，我指定了。。请参阅我的编辑。您从哪里发送委托方法的消息？您的VC B类中的哪个方法？其中有[self.delegate addItemViewController:self didFinishWithGardenID:_kidGaedIdGardenName:_kidGardenNameand CityName:_kidCityName]；DidSelectRowAtIndex路径：tableviewmethod@property（非原子，弱）id委托；弱？？？？我认为这是在它被使用之前发布的-Try Strong上次尝试时，我被告知它应该是赋值的，但肯定不是Strong，我不知道。@property（非原子，弱）id delegate；弱？？？？我想这是在它被使用之前发布的-Try Strong我上次尝试时被告知它应该被分配，但肯定不是Strong我不确定。我在ViewControllerA@property（nonatomic，Strong）SearchGardenTable*searchGarden中有一个属性；我看得出来。但是您正在viewDidLoad中初始化一个新的VC B实例，因此它可能与您正在显示的实例不同。值得一看您为从VC AIt中推送VC B而编写的代码。您仍然缺少再次从VC Aedit中推送VC B的代码，现在所有代码都显示在VC B弹出窗口中。@OshriALM请参阅我的编辑2。我在ViewControllerA@property（非原子，强）SearchGardentTable*searchGarden中有一个属性；我看得出来。但是您正在viewDidLoad中初始化一个新的VC B实例，因此它可能与您正在显示的实例不同。值得一看你写的从VC AIt中推送VC B的代码仍然缺少再次从VC AIt中推送VC B的代码，现在有了VC B弹出窗口的所有代码。@OshriALM请参见我的编辑2。我不能使用segue，因为ViewController B是一个弹出窗口，我使用gitHub MZFormSheetController的这个包实现它。当我点击ViewControllerB中的一个单元格时，弹出窗口被关闭。因此，在关闭弹出窗口（VC B）之前，我必须准备好要传递的数据。是的，在单击执行的位置收集数据。您只需调用[self-PerformsgueWithIdentifier:@“controllerB”发送者：self]；在您收集数据之后。它将调用方法-（void）prepareforsgue:（UIStoryboardSegu