我有一个用Swift编写的类,其中定义了一个协议:

protocol PhotoIngestionDelegate {
    func pictureTaken()
}


我试图让用Objective-C编写的类(CameraViewController)符合此协议。

CameraViewController.h:

#import <GSSDK/GSSDK.h>

@protocol PhotoIngestionDelegate;

@interface CameraViewController : GSKCameraViewController <PhotoIngestionDelegate>

@end


CameraViewController.m:

#import "CameraViewController.h"

#import <GSSDK/GSSDK.h>
#import "EditFrameViewController.h"
#import "Scan.h"


@interface CameraViewController<PhotoIngestionDelegate> ()

@property (nonatomic, strong) UIView *toolbar;
@property (nonatomic, strong) UIButton *cameraButton;

@end

@implementation CameraViewController

...


CameraViewController.m中的实现仍在继续,但是为了简洁起见,我将其切除。我知道我需要在CameraViewController.m中定义函数pictureTaken(),但似乎无法使委托连接正常工作。在CameraViewController.h中,我得到它Cannot find protocol definition for 'PhotoIngestionDelegate'

最佳答案

尝试这个

@objc protocol PhotoIngestionDelegate {

}

10-08 06:24