//
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// JHPieForeBGView.m
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// JHCALayer
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//
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// Created by cjatech-简豪 on 16/4/28.
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// Copyright © 2016年 JH. All rights reserved.
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//
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#import "JHPieForeBGView.h"
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@implementation JHPieForeBGView
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-(void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
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[self touchesBegan:touches withEvent:event];
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}
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-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
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UITouch *touch = [touches anyObject];
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CGPoint p = [touch locationInView:self];
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if ((p.x-self.frame.size.width/2)*(p.x-self.frame.size.width/2) + (p.y-self.frame.size.height/2)*(p.y-self.frame.size.height/2) >self.frame.size.height*self.frame.size.height) {
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return;
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}
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/* 计算角度并block回调 */
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CGFloat aLen2 = (p.x - self.frame.size.width/2)*(p.x - self.frame.size.width/2) + (p.y - self.frame.size.width/2)*(p.y - self.frame.size.width/2);
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CGFloat aLen = sqrt(aLen2);
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CGFloat cLen2 =self.frame.size.width/2 * self.frame.size.width/2;
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CGFloat cLen = self.frame.size.width/2;
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CGFloat bLen2 = (p.x - self.frame.size.width)*(p.x - self.frame.size.width) + (p.y - self.frame.size.width/2)*(p.y - self.frame.size.width/2);
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CGFloat angle = acos((aLen2 + cLen2 -bLen2)/2/aLen/cLen);
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if (p.y<self.frame.size.height/2) {
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angle = M_PI*2 -angle;
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}
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if (self.select) {
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self.select(angle,p);
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}
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}
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@end
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