如何用CMMotionManager替换UIAccelerometer？ [英] How to replace UIAccelerometer with CMMotionManager?

问题描述

我是iOS开发的新手。

我按照。我添加了一些小功能，您可以手动添加不在Google数据库中的位置，但我认为这些功能不会导致问题。

提前感谢您的帮助！

解决方案

试试这个链接： https://www.inkling.com/read/learning-ios-编程 - alasdair-allan-2nd / chapter-9 / the-core-motion-framework

我正在学习一些可以翻译一些内容的花絮使用UIAccelerometer

ie

  [self setAccelometerManager [UIAccelerometer sharedAccelerometer] ]。 
  

可能成为

  [self.motionManager = [[CMMotionManager alloc] init]; 
  

设置手动更新间隔，例如

  [[self accelerometerManager] setUpdateInterval：0.25]; 
  

你可以拥有

  self.motionManager.accelerometerUpdateInterval = 0.25; 
  

并释放代表

  self.accelerometerManager.delegate = nil; 
  

现在

  [self.motionManager stopDeviceMotionUpdates]; 
  

同样从这个链接，我最终做了这样的事情：

  motionManager = [[CMMotionManager alloc] init]; 
 
 motionManager.accelerometerUpdateInterval = 1.0 / 10.0; //以10Hz更新
 
 if（motionManager.accelerometerAvailable）{
 queue = [NSOperationQueue currentQueue]; 
 [motionManager startAccelerometerUpdatesToQueue：queue withHandler：^（CMAccelerometerData * accelerometerData，NSError * error）{
 switch（currentOrientation）{
 case UIDeviceOrientationLandscapeLeft：
 viewAngle = atan2（accelerometerData.acceleration。 x，accelerometerData.acceleration.z）; 
休息; 
 case UIDeviceOrientationLandscapeRight：
 viewAngle = atan2（-accelerometerData.acceleration.x，accelerometerData.acceleration.z）; 
休息; 
 case UIDeviceOrientationPortrait：
 viewAngle = atan2（accelerometerData.acceleration.y，accelerometerData.acceleration.z）; 
休息; 
 case UIDeviceOrientationPortraitUpsideDown：
 viewAngle = atan2（-accelerometerData.acceleration.y，accelerometerData.acceleration.z）; 
休息; 
默认值：
 break; 
} 
 [self updateCenterCoordinate]; 
}]; 
 
} 
  

I'm new to iOS development.

I follow the tutorial from Ray Wenderlich to create a little location based AR app. However, the tutorial uses an AR Toolkit which has not been updated for a while. The UIAccelerometer it uses has already been deprecated since iOS 5, so when I try to run it on my iPhone (iOS 7.0.4), the Xcode says that there are 3 warnings, and all of them are caused by UIAccelerometer.

The result it leads to is that all the marks stay at the center of the screen one above another, and the tilt does not work at all.

According to my research, I guess what I need to do is to use CMMotionManager instead of UIAccelerometer, but as I said before, I'm totally new to iOS development and have no idea how to replace it.

Here is the source code. I add some little functions such that you can manually add locations that are not in the Google database, but I don't think it is these functions that result in the problem.

Thanks for you help in advance!

解决方案

Try this link: https://www.inkling.com/read/learning-ios-programming-alasdair-allan-2nd/chapter-9/the-core-motion-framework

I'm learning a few tidbits that translate some-what with the UIAccelerometer

i.e.

[self setAccelometerManager [UIAccelerometer sharedAccelerometer]];

could become

[self.motionManager = [[CMMotionManager alloc] init];

Setting manual update intervals like

[[self accelerometerManager] setUpdateInterval: 0.25];

you can have

self.motionManager.accelerometerUpdateInterval = 0.25;

and releasing the delegate

self.accelerometerManager.delegate = nil;

would now be

[self.motionManager stopDeviceMotionUpdates];

Also from the link, I ended up doing something like this:

motionManager = [[CMMotionManager alloc] init];

motionManager.accelerometerUpdateInterval  = 1.0/10.0; // Update at 10Hz

if (motionManager.accelerometerAvailable) {
    queue = [NSOperationQueue currentQueue];
    [motionManager startAccelerometerUpdatesToQueue:queue withHandler:^(CMAccelerometerData *accelerometerData, NSError *error) {
        switch (currentOrientation) {
            case UIDeviceOrientationLandscapeLeft:
                viewAngle = atan2(accelerometerData.acceleration.x, accelerometerData.acceleration.z);
                break;
            case UIDeviceOrientationLandscapeRight:
                viewAngle = atan2(-accelerometerData.acceleration.x, accelerometerData.acceleration.z);
                break;
            case UIDeviceOrientationPortrait:
                viewAngle = atan2(accelerometerData.acceleration.y, accelerometerData.acceleration.z);
                break;
            case UIDeviceOrientationPortraitUpsideDown:
                viewAngle = atan2(-accelerometerData.acceleration.y, accelerometerData.acceleration.z);
                break;  
            default:
                break;
        }
        [self updateCenterCoordinate];
    }];

}

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