我正在编程指南针然而,它正在工作(感谢教程).
给出实际位置(经度和纬度).
罗盘内的箭头是否可以显示指向特定位置(经度2和纬度2)的方向?
我已经读过,我必须考虑iphone的磁性和真实标题.
- (voID)locationManager:(CLLocationManager *)manager dIDUpdateheading:(CLheading *)newheading { double heading = newheading.trueheading; //in degree relative to true north double bearing = ... //get current bearing in degree relative to true north //with the Js library mentioned below it would be something like //bearing = userLoc.bearingTo(destionation); //just two lines,the the sake of the example double rotationInDegree = (bearing - heading); //the important line rotationInDegree = fmod((rotationInDegree + 360),360); //just to be on the safe sIDe :-) compassVIEwPerhapsAsImage.transform=CGAffinetransformMakeRotation(degreesToradians(rotationInDegree));}@H_404_19@计算轴承的良好链接:
> http://www.movable-type.co.uk/scripts/latlong.html有eplanations和JavaScript exampless,但很容易转换! 总结
以上是内存溢出为你收集整理的iPhone指南针显示到特定位置全部内容,希望文章能够帮你解决iPhone指南针显示到特定位置所遇到的程序开发问题。
如果觉得内存溢出网站内容还不错,欢迎将内存溢出网站推荐给程序员好友。
欢迎分享,转载请注明来源:内存溢出
评论列表(0条)