Iphone 尝试通过点击“使用委派取消”关闭视图控制器（根本不工作）

在导航控制器中具有两个视图控制器：

PhoneNumbersTVC

>保存由

NewPhoneNumberTVC

NewPhoneNumberTVC

>用于添加电话号码的控制器

当我点击

NewPhoneNumberTVC

上的取消按钮时，我想返回

phoneNumberTVC

，并进行如下授权

电话号码tvc.h

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

@interface PhoneNumbersTVC : UITableViewController <NewPhoneNumberTVCDelegate>

@end

#import <UIKit/UIKit.h>

@class NewPhoneNumberTVC;

@protocol NewPhoneNumberTVCDelegate <NSObject>

- (void)saveBtnWasTappedOnNewPhoneNumberTVC:(NewPhoneNumberTVC *)newPhoneNumberTVC;
- (void)cancelBtnWasTappedOnNewPhoneNumberTVC:(NewPhoneNumberTVC *)newPhoneNumberTVC;

@end


@interface NewPhoneNumberTVC : UITableViewController

@property (weak, nonatomic) id <NewPhoneNumberTVCDelegate> delegate;
@property (strong, nonatomic) NSManagedObjectContext *managedOC;

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

- (IBAction)saveBtnTapped:(UIBarButtonItem *)sender;
- (IBAction)cancelBtnTapped:(UIBarButtonItem *)sender;

@end

新电话号码vc.h

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

@interface PhoneNumbersTVC : UITableViewController <NewPhoneNumberTVCDelegate>

@end

#import <UIKit/UIKit.h>

@class NewPhoneNumberTVC;

@protocol NewPhoneNumberTVCDelegate <NSObject>

- (void)saveBtnWasTappedOnNewPhoneNumberTVC:(NewPhoneNumberTVC *)newPhoneNumberTVC;
- (void)cancelBtnWasTappedOnNewPhoneNumberTVC:(NewPhoneNumberTVC *)newPhoneNumberTVC;

@end


@interface NewPhoneNumberTVC : UITableViewController

@property (weak, nonatomic) id <NewPhoneNumberTVCDelegate> delegate;
@property (strong, nonatomic) NSManagedObjectContext *managedOC;

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

- (IBAction)saveBtnTapped:(UIBarButtonItem *)sender;
- (IBAction)cancelBtnTapped:(UIBarButtonItem *)sender;

@end

}

---

当我点击

NewPhoneNumberTVC

上的cancel时，我看到上面的方法

CancelBTantaped

启动，但是

委派

不起作用，没有

方法在
PhoneNumberTvc
中执行。视图没有消失，我也没有看到：
console上的
cancelBtnWasTappedOnNewPhoneNumberTVC
。例如，PhoneNumbersTVC.m中应该存在一些代码：

NewPhoneNumberTVC *myNewPhoneNumberTVC = [[NewPhoneNumberTVC alloc] init];
myNewPhoneNumberTVC.delegate = self;

您可以按以下方式登录以验证是否成功设置了委托“

NewPhoneNumberTVC.m

- (void)saveBtnWasTappedOnNewPhoneNumberTVC:(NewPhoneNumberTVC *)newPhoneNumberTVC
{
    NSLog(@"saveBtnWasTappedOnNewPhoneNumberTVC");
    [newPhoneNumberTVC.navigationController popViewControllerAnimated:YES];
}

- (void)cancelBtnWasTappedOnNewPhoneNumberTVC:(NewPhoneNumberTVC *)newPhoneNumberTVC
{
    NSLog(@"cancelBtnWasTappedOnNewPhoneNumberTVC");
    [newPhoneNumberTVC.navigationController popViewControllerAnimated:YES];
}

- (IBAction)cancelBtnTapped:(UIBarButtonItem *)sender
{
    NSLog(@"cancelBtnTapped");
    self.phoneNumberTextField.text = @"";
    self.phoneKindTextField.text = @"";
    [self.delegate cancelBtnWasTappedOnNewPhoneNumberTVC:self];

- (IBAction)cancelBtnTapped:(UIBarButtonItem *)sender
{
NSLog(@"cancelBtnTapped");
self.phoneNumberTextField.text = @"";
self.phoneKindTextField.text = @"";
NSLog(@"self.delegate :%@",self.delegate);
[self.delegate cancelBtnWasTappedOnNewPhoneNumberTVC:self];
}

你确定你已经设置了代理吗？如果是，你在什么时候设置代理？你在哪里设置了NewPhoneNumberTVC的代理？@lu yuam我告诉代理在方法中点击了取消：
cancelBtnTapped
[self.delegate cancelBtnWasTappedOnNewPhoneNumberTVC:self]我自己刚找到的。完全忘了。谢谢！