iPhone 4上的CMMotionManager和陀螺仪 [英] CMMotionManager and the Gyroscope on iPhone 4

问题描述

我试图简单地NSLog新iPhone 4陀螺仪的输出。但在阅读文档并遵循其示例代码后，我收到此错误。

I am trying to simply NSLog the output of the new iPhone 4 Gyroscope. But after reading the documentation and following their sample code I am getting this error.

ERROR,Time,300635803.946,Function,"CLLoggingSetFile",could not open locations log /var/mobile/Library/Caches/CoreMotion/CoreMotion.log

即使我只是用[[CMMotionManager alloc] init]设置我的motionManager对象;我自己也没有其他代码，我仍然得到错误。

Even if I just setup my motionManager object with [[CMMotionManager alloc] init]; on its own and no other code, I still get the error.

这是我的.h文件。

#import <UIKit/UIKit.h>
#import <CoreMotion/CoreMotion.h>

@interface GyroTest0ViewController : UIViewController {
    CMMotionManager *motionManager;
    NSOperationQueue *opQ;
}

@end

这里是我的.m文件。

- (void)viewDidLoad {
    [super viewDidLoad];

    // the error occurs even just with this line on its own
    motionManager = [[CMMotionManager alloc] init]; 

    if (motionManager.gyroAvailable) {
        motionManager.gyroUpdateInterval = 1.0/60.0;
        [motionManager startGyroUpdates];
        opQ = [[NSOperationQueue currentQueue] retain];
        CMGyroHandler gyroHandler = ^ (CMGyroData *gyroData, NSError *error) {
            CMRotationRate rotate = gyroData.rotationRate;
            NSLog(@"rotation rate = [%f, %f, %f]", rotate.x, rotate.y, rotate.z);
        };
    } else {
        NSLog(@"No gyroscope on device.");
        [motionManager release];
    }
}

任何简单记录的帮助和/或源代码iPhone 4陀螺仪数据将非常受欢迎。非常感谢！

Any help and/or source code to simply log the iPhone 4 gyroscope data would be much appreciated. Many thanks!

推荐答案

有关此问题的任何结果？即使我使用WWDC茶壶演示代码，我也会得到同样的错误。
我提交了一份错误报告（8382659）。

Any results regarding this issue? I get the same error even when I use WWDC teapot demo code. I filed a bug report (8382659).

当我使用Joshua Weinberg描述的推送方法时，我得到了同样的错误。

By the way I get the same error when I use the push method described by Joshua Weinberg.

更新：Apple确认了该错误，但提到了我找不到的重复问题8173937。好吧，我们希望它能在下一个版本中修复。

Update: Apple confirmed the bug but referred to a duplicate issue 8173937 that I can't find. Well let's hope that it will be fixed in the next release.

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