程序调用: using iTextSharp.text.pdf; using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace TestIText { class Program { static void Main(string[] args) { PdfReader readerTemp = new
一.NSClassFromString是NSObjCRuntime.h的方法 FOUNDATION_EXPORT Class __nullable NSClassFromString(NSString *aClassName); Description:Obtains a class by name.The name of a class.Parameters:aClassName The name of a classReturns:The class object named by aCla
获取地球上两经纬度坐标点间的距离,利用[大圆距离公式] A diagram illustrating great-circle distance (drawn in red) between two points on a sphere, P and Q. Two antipodal points, u and v, are also depicted. 谷歌都在用呢, C#实现的代码如下: /// <summary> /// 地球半径 /// </summary> priva