用加速度计摇动iPhone! [英] Shake iphone with accelerometer !
本文介绍了用加速度计摇动iPhone!的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
大家好,出于某些原因,我无法使用摇晃API,所以我通过加速度计使用摇晃设备,但是我不知道为什么iPhone 4和iPad不支持此代码!但可以在所有设备上使用..我不知道发生了什么!这是我的代码:
Hi every one for some reasons i can't use shake API , so iam using shake device via accelerometer , but i don't why iPhone 4 , iPad do not support this code !!! but works on all devices .. i don't know what's going on ! here is my code :
#define kAccelerationThreshold 2.2
#define kUpdateInterval (1.0f/10.0f)
@interface info : UIViewController <UIAccelerometerDelegate> {
}
@end
~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~
@implementation info
- (void)viewDidLoad {
UIAccelerometer *accel = [UIAccelerometer sharedAccelerometer];
accel.delegate = self;
accel.updateInterval = kUpdateInterval;
[super viewDidLoad];
}
#pragma mark -
- (void)accelerometer:(UIAccelerometer *)accelerometer
didAccelerate:(UIAcceleration *)acceleration {
{
if (acceleration.x > kAccelerationThreshold
|| acceleration.y > kAccelerationThreshold
|| acceleration.z > kAccelerationThreshold) {
//What do you want to do !
self.view.backgroundColor = [UIColor orangeColor];
}
}
}
推荐答案
如果您无法在iPhone上使用摇动API,则可能尚未将视图控制器设置为viewDidAppear上的第一响应者.在您的视图控制器上实现此方法:
If you can't use the shake API on your iPhone, you probably haven't set your view controller as the first responder on viewDidAppear. Implement this method on your view controller:
-(void)viewDidAppear:(BOOL)animated{
[super viewDidAppear:animated];
[self becomeFirstResponder];
}
现在,您将可以使用摇摇API.希望能有所帮助:)
Now you will be able to use the shake API. Hope that helps :)
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