Swift 协议与objective-c ViewController 类交互

Question

我正在尝试使用协议从 swift 类中的视图控制器类中触发一个函数。

@objc protocol KestrelDeviceConnectDelegate: AnyObject {    
    func readingIsOver()    
}

class KestrelDeviceConnect: NSObject {    

    weak var delegate: KestrelDeviceConnectDelegate?

    func timerAction() {    
        timerCounter += 1
        if(timerCounter >= 20){
            progressHUD.hide()
            timerCounter = 0
            timer.invalidate()
            self.delegate?.readingIsOver()

            //present kestrel alert
        }
    }
}

在视图控制器类viewdidload

KestrelDeviceConnect *bluetoothManager = [[KestrelDeviceConnect alloc]init];
bluetoothManager.delegate = self;

我想从我的 swift 类中调用的函数

- (void)readingIsOver {
    [[self logConditionsButton] setHidden:NO];
}

Answer 1

您需要通过将bluetoothManager 设为实例变量来保持强引用

KestrelDeviceConnect *bluetoothManager;

---

bluetoothManager = [[KestrelDeviceConnect alloc]init];