- 氣壓計實際上叫測高儀,因為氣壓主要與海拔高度有關
- 氣壓計的硬體在iPhpne内部,主要是檢測大氣壓強(kPa)的,而大氣壓強由于海拔高度有關
- 不是檢測風速的,不要以為對着iPhone吹氣,氣壓值就會變化
- 傳感器不屬于隐私功能,不需要授權
- 氣壓計是iPhone6開始加入的硬體,不支援6以前的機型
- 使用氣壓計相當簡單
#import "ViewController.h"
//傳感器架構
#import <CoreMotion/CoreMotion.h>
@interface ViewController ()
@property(nonatomic,strong)CMAltimeter *altimeter;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
//1.建立氣壓計(測高儀),這裡要用全局變量,不然會被釋放
self.altimeter = [[CMAltimeter alloc] init];
//2.檢測目前裝置是否可用(iphone6機型之後新增)
if([CMAltimeter isRelativeAltitudeAvailable])
{
//3.開始檢測氣壓
[self.altimeter startRelativeAltitudeUpdatesToQueue:[NSOperationQueue mainQueue] withHandler:^(CMAltitudeData * _Nullable altitudeData, NSError * _Nullable error) {
NSLog(@"高度:%0.2f m 氣壓值:%0.2f kPa",[altitudeData.relativeAltitude floatValue],[altitudeData.pressure floatValue]);
}];
}
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end