距离传感器:
2016年04月05日 10:32:51发布于csdn--http://blog.csdn.net/nsydianzi
网上关于距离传感器使用很简单,流程也少.下面用代码解释下怎么启动距离传感器并且进行监听。
// 1.开启距离传感器(注意: 默认情况距离传感器是关闭的)
// 只要开启之后, 就开始实时监听
[UIDevice currentDevice].proximityMonitoringEnabled = YES;
// 2.当监听到有物体靠近设备时系统会发出通知
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(proximityStateDidChange:) name:UIDeviceProximityStateDidChangeNotification object:nil];
// 当监听到有物体靠近设备时调用
- (void)proximityStateDidChange:(NSNotification *)note
{
if( [UIDevice currentDevice].proximityState)//判断物体接近状态
{
NSLog(@"有物体靠近");
}else{
NSLog(@"物体离开");
}
}
加速度传感器:
在iOS4以前使用UIAccelerometer来获取到设备的加速度,用法简单,但是在iOS5时已经过期.
但是从iOS4开始苹果提供了一个库,CoreMotion.framework来获取设备的加速度信息,功能更加强大
但是在iOS8已经完全不能使用
UIAccelerometer使用步骤: //被废弃,简单写一点用法步骤
1.获得单例对象
UIAccelerometer *acc = [UIAccelerometer sharedAccelerometer];
2.设置代理
遵循协议
acc.delegate = self;
实现代理方法
- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration;
这个方法只要采集到数据就会调用
3.设置采样间隔
acc.updateInterval = 1 / 30;
CoreMotion使用步骤:
1.创建运动管理者对象
self.mgr = [[CMMotionManager alloc] init];
/* CMMotionManager 属性
isAccelerometerActive 是否正在采集
accelerometerData 采集到得数据
startAccelerometerUpdates pull
startAccelerometerUpdatesToQueue push
stopAccelerometerUpdates 停止采集
accelerometerUpdateInterval 采样时间
*/
2.判断加速计是否可用(最好是要判断),断加速计可用则设置下面的数据
if (self.mgr.isAccelerometerAvailable) {}
3.设置采样间隔
self.mgr.accelerometerUpdateInterval = 0.1 ;/// 30.0;
4.开始采样
[self.mgr startAccelerometerUpdatesToQueue:[NSOperationQueuemainQueue]
withHandler:^(CMAccelerometerData*accelerometerData, NSError *error) {
// 这个block是采集到数据时就会调用
if (error) return ;
CMAcceleration acceleration = accelerometerData.acceleration;
NSLog(@"x = %f y = %f z = %f", acceleration.x, acceleration.y, acceleration.z);
}];
UIDevice
typedef NS_ENUM(NSInteger, UIDeviceOrientation) //设备方向
{
UIDeviceOrientationUnknown,
UIDeviceOrientationPortrait, // 竖向，头向上
UIDeviceOrientationPortraitUpsideDown, // 竖向，头向下
UIDeviceOrientationLandscapeLeft, // 横向，头向左
UIDeviceOrientationLandscapeRight, // 横向，头向右
UIDeviceOrientationFaceUp, // 平放，屏幕朝下
UIDeviceOrientationFaceDown // 平放，屏幕朝下
};
typedef NS_ENUM(NSInteger, UIDeviceBatteryState) //电池状态
{
UIDeviceBatteryStateUnknown,
UIDeviceBatteryStateUnplugged, // 未充电
UIDeviceBatteryStateCharging, // 正在充电
UIDeviceBatteryStateFull, // 满电
};
typedef NS_ENUM(NSInteger, UIUserInterfaceIdiom) //用户界面类型
{
//iOS3.2以上有效
#if __IPHONE_3_2 <= __IPHONE_OS_VERSION_MAX_ALLOWED
UIUserInterfaceIdiomPhone, // iPhone 和 iPod touch 风格
UIUserInterfaceIdiomPad, // iPad 风格
#endif
};
#define UI_USER_INTERFACE_IDIOM() ([[UIDevice currentDevice] respondsToSelector:@selector(userInterfaceIdiom)] ? [[UIDevice currentDevice] userInterfaceIdiom] : UIUserInterfaceIdiomPhone)
#define UIDeviceOrientationIsPortrait(orientation) ((orientation) == UIDeviceOrientationPortrait || (orientation) == UIDeviceOrientationPortraitUpsideDown)
#define UIDeviceOrientationIsLandscape(orientation) ((orientation) == UIDeviceOrientationLandscapeLeft || (orientation) == UIDeviceOrientationLandscapeRight)
NS_CLASS_AVAILABLE_IOS(2_0) @interface UIDevice : NSObject {
@private
NSInteger _numDeviceOrientationObservers;
float _batteryLevel;
struct {
unsigned int batteryMonitoringEnabled:1;
unsigned int proximityMonitoringEnabled:1;
unsigned int expectsFaceContactInLandscape:1;
unsigned int orientation:3;
unsigned int batteryState:2;
unsigned int proximityState:1;
} _deviceFlags;
}
+ (UIDevice *)currentDevice; // 获取当前设备
@property(nonatomic,readonly,retain) NSString *name; // e.g. "My iPhone"
@property(nonatomic,readonly,retain) NSString *model; // e.g. @"iPhone", @"iPod touch"
@property(nonatomic,readonly,retain) NSString *localizedModel; // localized version of model
@property(nonatomic,readonly,retain) NSString *systemName; // e.g. @"iOS"
@property(nonatomic,readonly,retain) NSString *systemVersion; // e.g. @"4.0"
@property(nonatomic,readonly) UIDeviceOrientation orientation; // 除非正在生成设备方向的通知，否则返回UIDeviceOrientationUnknown 。
@property(nonatomic,readonly,retain) NSUUID *identifierForVendor NS_AVAILABLE_IOS(6_0); // 可用于唯一标识该设备，同一供应商不同应用具有相同的UUID 。
@property(nonatomic,readonly,getter=isGeneratingDeviceOrientationNotifications) BOOL generatesDeviceOrientationNotifications; //是否生成设备转向通知
- (void)beginGeneratingDeviceOrientationNotifications;
- (void)endGeneratingDeviceOrientationNotifications;
@property(nonatomic,getter=isBatteryMonitoringEnabled) BOOL batteryMonitoringEnabled NS_AVAILABLE_IOS(3_0); // 是否启动电池监控，默认为NO
@property(nonatomic,readonly) UIDeviceBatteryState batteryState NS_AVAILABLE_IOS(3_0); // 如果禁用电池监控，则电池状态为UIDeviceBatteryStateUnknown
@property(nonatomic,readonly) float batteryLevel NS_AVAILABLE_IOS(3_0); //电量百分比， 0 .. 1.0。如果电池状态为UIDeviceBatteryStateUnknown，则百分比为-1.0
@property(nonatomic,getter=isProximityMonitoringEnabled) BOOL proximityMonitoringEnabled NS_AVAILABLE_IOS(3_0); // 是否启动接近监控（例如接电话时脸靠近屏幕），默认为NO
@property(nonatomic,readonly) BOOL proximityState NS_AVAILABLE_IOS(3_0); // 如果设备不具备接近感应器，则总是返回NO
@property(nonatomic,readonly,getter=isMultitaskingSupported) BOOL multitaskingSupported NS_AVAILABLE_IOS(4_0); // 是否支持多任务
@property(nonatomic,readonly) UIUserInterfaceIdiom userInterfaceIdiom NS_AVAILABLE_IOS(3_2); // 当前用户界面模式
- (void)playInputClick NS_AVAILABLE_IOS(4_2); // 播放一个输入的声音
@end
@protocol UIInputViewAudioFeedback
@optional
@property (nonatomic, readonly) BOOL enableInputClicksWhenVisible; // 实现该方法，返回YES则自定义的视图能够播放输入的声音
@end
UIKIT_EXTERN NSString *const UIDeviceOrientationDidChangeNotification; // 屏幕方向变化通知
UIKIT_EXTERN NSString *const UIDeviceBatteryStateDidChangeNotification NS_AVAILABLE_IOS(3_0); // 电池状态变化通知
UIKIT_EXTERN NSString *const UIDeviceBatteryLevelDidChangeNotification NS_AVAILABLE_IOS(3_0); // 电池电量变化通知
UIKIT_EXTERN NSString *const UIDeviceProximityStateDidChangeNotification NS_AVAILABLE_IOS(3_0); // 接近状态变化通知