NSOperationQueue并将代理发送到主线程

Question

嗨，我有我的类传感器，其中有gps，陀螺仪，加速度计，我想从nsoperationqueue中以委托形式发送数据：

@protocol SensorsDelegate <NSObject>
@optional
- (void)motionManagerDidAccelerateData:(CMAccelerometerData *)accelerometerData;
@end


- (void)startAccelerometr
{
    if (motionManager.accelerometerAvailable) {

        self.motionManager.accelerometerUpdateInterval = 1.0/10.0;
        [self.motionManager startAccelerometerUpdatesToQueue:self.operationQueue 
          withHandler:^(CMAccelerometerData *accelerometerData, NSError *error) {
            if (error) {
                [motionManager stopAccelerometerUpdates];
            }
            else {
                [self.delegate motionManagerDidAccelerateData:accelerometerData];
            }
        }];
    }
}

如何将数据发送到主线程中的委托？ 还是发送加速器数据？

Answer 1

将onMainThread:方法放在同一类中，然后像这样更改代码

- (void)startAccelerometr
{
        if (motionManager.accelerometerAvailable) {

        self.motionManager.accelerometerUpdateInterval = 1.0/10.0;
        [self.motionManager startAccelerometerUpdatesToQueue:self.operationQueue 
          withHandler:^(CMAccelerometerData *accelerometerData, NSError *error) {
            if (error) {
                [motionManager stopAccelerometerUpdates];
            }
            else {
                [self performSelectorOnMainThread:@selector(onMainThread:)
                  withObject:accelerometerData waitUntilDone:NO];
            }
        }];
    }
}

- (void)onMainThread:(id)accelerometerData{
    [self.delegate motionManagerDidAccelerateData:accelerometerData];
}

Answer 2

您是否尝试过使用

[self.delegate performSelectorOnMainThread:@selector(motionManagerDidAccelerateData:) withObject:accelerometerData waitUntilDone:NO];

Answer 3

你可以试试：

假设委托是在Sensor初始化方法中分配的NSObject<SensorDelegate>*类型的属性：

[self.delegate performSelectorOnMainThread:@selector(motionManagerDidAccelerateData:) withObject:accelerometerData waitUntilDone:NO];

希望能帮助到你。

Answer 4

将要发送加速​​度计更新的队列更改为主队列。

    [self.motionManager startAccelerometerUpdatesToQueue:[NSOperationQueue mainQueue] withHandler:^(CMAccelerometerData *accelerometerData, NSError *error) {