objective-c - 在类型错误的对象上找不到属性，但属性存在

Question

所以我试图访问 SerialPortController 中的属性 isPortClosed(BOOL) ，它给了我一个错误，我对 Objective-C 有点陌生。我觉得这应该可行，因为我已经通过 *port 引用了该类。这是project.的链接

错误消息:~/GroundStation/GroundStation/ViewController.m:16:22:在“SerialPortController *”类型的对象上找不到属性“isPortClosed”

        #import <Cocoa/Cocoa.h>
    #import "SceneView.h"
    #import "SerialPortController.h"

    @interface ViewController : NSViewController
    @property (strong) IBOutlet SerialPortController *port;
    @property (weak) IBOutlet SceneView *accelSceneView;



    @end
    #import "ViewController.h"

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    while(!self.port.isPortClosed) {

    }
}

- (void)setRepresentedObject:(id)representedObject {
    [super setRepresentedObject:representedObject];

    // Update the view, if already loaded.
}

@end

SerialPortController.h 类

#import <Foundation/Foundation.h>
#import <ORSSerial/ORSSerial.h>

@interface SerialPortController : NSObject <ORSSerialPortDelegate>
@property (nonatomic, strong) ORSSerialPort *serial;
@property (nonatomic, strong) ORSSerialPortManager *serialPortManager;
@property (nonatomic) NSInteger xAngle;
@property (nonatomic) NSInteger yAngle;
@property (nonatomic) NSInteger zAngle;
@property (nonatomic) NSString *stringBuffer;
@property (nonatomic) BOOL isPortClosed;
@end

Answer 1

从下载的项目中，我看到您有两个 SerialPortController 类定义(一个位于根目录，一个位于/GroundStation/中)，而后者没有任何公共(public)属性。您的项目中应该只有一个链接的 SerialPortController 类定义(具有公共(public)属性的类定义)。