Ios 自定义委托方法不能调用

当我单击按钮时，我第一次显示开始\游戏屏幕，此时使用xib显示popupview。在xib类中，我创建了委托方法。当我关闭popupview时，该时间调用委托方法，但不调用

这是我的代表课 .h文件 进口

@protocol digbuttonalertdelegate;

@interface digbuttonalert : UIViewController
@property (weak, nonatomic) IBOutlet UIImageView *bg_image;

@property (weak, nonatomic) IBOutlet UILabel *lbl_title;
@property (nonatomic, weak) id<digbuttonalertdelegate> delegate;
@end
@protocol digbuttonalertdelegate <NSObject>
@optional
-(void)digalertclose;
@end

.m File

#import "digbuttonalert.h"
#import "suggestion_alert.h"
#import "UIViewController+CWPopup.h"
#import "zoom_alert.h"
@interface digbuttonalert ()
{
    bool status;
}
@end

@implementation digbuttonalert

- (void)viewDidLoad {
    [super viewDidLoad];
    status=0;
    UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapDetected)];
    singleTap.numberOfTapsRequired = 1;
    [self.bg_image setUserInteractionEnabled:YES];
    [self.bg_image addGestureRecognizer:singleTap];

    // Do any additional setup after loading the view from its nib.
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
- (IBAction)close:(id)sender {
   }
-(void)tapDetected{
    NSLog(@"single Tap on imageview");

    if(status==0)
    {
        self.lbl_title.text=@"As you walk you will discover the hidden map.This circle will show your progress.";
        status=1;
    }
    else
    {

        [self dismissViewControllerAnimated:YES completion:nil];
        if ([self.delegate respondsToSelector:@selector(digalertclose)]) {
            [self.delegate digalertclose];

        }


    }



}

在这里，我想调用这个类的方法

 #import "digbuttonalert.h"
     @interface start_games ()  <MJSecondPopupDelegate,digbuttonalertdelegate>
    {
     - (void)viewDidLoad {
digbuttonalert *next=[[digbuttonalert alloc]init];
    next.delegate=self;

    next.modalTransitionStyle=UIWebPaginationModeRightToLeft;
    next.modalPresentationStyle=17;
    [self presentViewController:next animated:YES completion:nil];


            }
        - (void)digalertclose
        {

            [self StartTimer];
            [[NSUserDefaults standardUserDefaults]setObject:@"false" forKey:@"alertstatus"];
        }

---

在类中，您需要如下声明委托：

@interface YourViewController () < digbuttonalertdelegate >

---

将.m文件更改为以下内容：

@protocol digbuttonalertdelegate <NSObject>
    @optional
    -(void)digalertclose;
 @end

 @interface digbuttonalert : UIViewController
    @property (weak, nonatomic) IBOutlet UIImageView *bg_image;
    @property (weak, nonatomic) IBOutlet UILabel *lbl_title;
    @property (nonatomic, weak) id<digbuttonalertdelegate> delegate;
 @end

并遵循基本的教程步骤：

请像这样在开始游戏控制器中实现digalertclose委托

-(void)digalertclose {
}

您将digalertclose设置为可选的，这就是为什么不会发生崩溃的原因。如果从digbuttonalertdelegate协议中删除可选关键字，您可以看到将发生崩溃，因为您尝试触发一个委托，但没有实现它

在digbuttonalert.h协议中定义了两次。 接口没有@end。 应该是

A.h级

@protocol YourProtocol <NSObject>

@optional
-(void)yourProtocolOptionalMethod

@end

@interface ClassA.h 

@property (weak, nonatomic) id <YourProtocol> delegate;

@end

B.h类

#import "ClassA.h"
@interface ClassB <YourProtocol>

@end

现在设置委托之后，当您从ClassA调用委托时，它将触发ClassB中的协议实现方法

-(void)yourProtocolOptionalMethod {
    NSlog(@"");
}

---

从您推digalertClose视图控制器的位置？@NinjaHattori在视图中加载puching digalertClose vc您可以共享该代码吗？@NinjaHattori我将添加代码如果其视图控制器，你应该用XIB初始化，或者从故事板初始化，或者重写视图控制器中的Init方法。我很惊讶。当你展示视图时，它会显示你的视图吗？@NinjaHattori如果他使用委托，那么他必须指定@interface YourViewController和obj.delgate=self。教程->

-(void) someClassBMethod {
    ClassA *classA = [ClassA alloc] init];
    classA.delegate = self;
}

-(void)yourProtocolOptionalMethod {
    NSlog(@"");
}