iOS 气压计海平面高度

Question

我正在为登山者制作一个 iOS 应用程序以从 SeaLevel 获取高度，目前我被困在这里。我使用 iOS Barometer 来获取详细信息，但它只提供 Pressure、Relative altitude 和 timestamp。是否有从海平面获得高度的计算？我正在使用以下方式获取值。我正在使用 CMAltimeter

NSNumberFormatter *formatter = [[NSNumberFormatter alloc]init]; formatter.maximumFractionDigits = 2; formatter.minimumIntegerDigits = 1; NSNumber *timestamp = [NSNumber numberWithDouble:altitudeData.timestamp]; NSString *timeInterval = [NSString stringWithFormat:@"%@", [formatter stringFromNumber:timestamp]]; NSString *altitude = [NSString stringWithFormat:@"%@", [formatter stringFromNumber:altitudeData.relativeAltitude]]; NSString *pressure = [NSString stringWithFormat:@"%@", [formatter stringFromNumber:altitudeData.pressure]]; self.label1.text = [NSString stringWithFormat:@"Time Interval: \n%@", timeInterval]; self.label2.text = [NSString stringWithFormat:@"Relative Altitude: \n%@", altitude]; self.label3.text = [NSString stringWithFormat:@"Air Pressure: \n%@", pressure];

Answer 1

请记住，这仅适用于 iPhone 6 及更高版本，因为只有它们内置了气压计。你要的公式叫测压公式。

P0 is sea-level pressure in hPa
P is atmospheric pressure in hPa
T is temperature in C
h is altitude in meters

#include <math.h>
h = ((pow(p0/p,1/5.257)-1)*(t+273.15))/0.0065;

iOS 气压计海平面高度

iOS Barometer SeaLevel Height

objective-c

ios

cmaltimeter