氣壓計實際上叫測高儀，因為氣壓主要與海拔高度有關(guān)
氣壓計的硬件在iphpne內(nèi)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(guān)不是檢測風(fēng)速的，不要以為對著PRoperty(nonatomic,strong)CMAltimeter *altimeter;@end@implementation ViewController- (void)viewDidLoad { [super viewDidLoad]; //1.創(chuàng)建氣壓計（測高儀）,這里要用全局變量，不然會被釋放 self.altimeter = [[CMAltimeter alloc] init]; //2.檢測當(dāng)前設(shè)備是否可用（iphone6機型之后新增） 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新聞熱點
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