绘制气泡

//
// Qipao.m
// demo
//
// Created by xie on 17/11/22.
// Copyright © 2017年 drt. All rights reserved.
//

import “Qipao.h”

@implementation Qipao

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
*/
- (void)drawRect:(CGRect)rect {
[self drawInContext:UIGraphicsGetCurrentContext()];

self.layer.shadowColor = [[UIColor clearColor] CGColor];self.layer.shadowOpacity = 1.0;self.layer.shadowOffset = CGSizeMake(0.0f, 0.0f);

}

-(void)drawInContext:(CGContextRef)context{
//设置当前图形的宽度
CGContextSetLineWidth(context, 2.0);
//填充泡泡颜色并设置透明度
// CGContextSetFillColorWithColor(context, [UIColor colorWithRed:0.3 green:0.3 blue:0.3 alpha:0.8].CGColor);
//填充的颜色
CGContextSetFillColorWithColor(context, [UIColor redColor].CGColor);

//[self getDrawPath:context];//填充形状内的颜色CGContextFillPath(context);

}

-(void)getDrawPath:(CGContextRef)context{
//取出当前的图形大小
CGRect rrect = self.bounds;
NSLog(@”%f”, self.frame.size.width);
NSLog(@”%f”, self.frame.size.height);
//设置园弧度
CGFloat radius = 30.0;

CGFloat minx = CGRectGetMinX(rrect),//0//中点midx = CGRectGetMidX(rrect),//100//最大的宽度的Xmaxx = CGRectGetMaxX(rrect);//200CGFloat miny = CGRectGetMinY(rrect),//0//最大的高度Ymaxy = CGRectGetMaxY(rrect)-_kArrorHeight;//60//1.画向下的三角形//2.设置起点三角形的右边点为起点CGContextMoveToPoint(context, midx+_kArrorHeight, maxy);//3.连线 右边点  －>连最下面上下面的点CGContextAddLineToPoint(context, midx, maxy+_kArrorHeight);//画直线//4.最下面的点连上  最左边的点。CGContextAddLineToPoint(context, midx-_kArrorHeight, maxy);//画4个圆弧//    CGContextAddArcToPoint(context, x1, y1, x2, y2, CGfloat radius );//画完后 current point不在minx,miny，而是在圆弧结束的地方CGContextAddArcToPoint(context, minx, maxy, minx, miny, radius);//画完后 current point不在minx,miny，而是在圆弧结束的地方CGContextAddArcToPoint(context, minx, miny, maxx, miny, radius);CGContextAddArcToPoint(context, maxx, miny, maxx, maxy, radius);CGContextAddArcToPoint(context, maxx, maxy, midx, maxy, radius);CGContextClosePath(context);

}

@end