// // ViewController.m // 勾股定理 // // Created by 张秀清 on 15/6/8. // Copyright (c) 2015年 张秀清. All rights reserved. // #import "ViewController.h" //角度转弧度 #define degreesToradian(x) (M_PI*x/180.0) //弧度转角度 #define radiansToDegrees(x) (180.0*x/M_PI) @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; CGPoint point1 = CGPointMake(100, 100); CGPoint point2 = CGPointMake(200, 200); CGFloat distance = [self distanceBetweenPoints:point1 point2:point2]; NSLog(@"%f",distance); CGFloat angle = [self angleBetweenPoints:point1 point2:point2]; NSLog(@"%f",angle); // CGFloat x = (point1.x + distance) * cos(angle); // CGFloat y = (point1.y + distance) * sin(angle); // // NSLog(@"%f---%f",x,y); } #pragma mark - 计算两点间的距离 -(CGFloat)distanceBetweenPoints:(CGPoint)point1 point2:(CGPoint)point2 { CGFloat distanceX = point2.x - point1.x; CGFloat distanceY = point2.y - point1.y; return sqrt(distanceX*distanceX + distanceY*distanceY); } #pragma mark - 计算两点间的角度 -(CGFloat)angleBetweenPoints:(CGPoint)point1 point2:(CGPoint)point2 { CGFloat height = point2.y - point1.y; CGFloat width = point1.x - point2.x; CGFloat rads = atan(height/width); return radiansToDegrees(rads); } @end
时间: 2024-10-01 07:15:19