zoukankan      html  css  js  c++  java
  • ios UIImage 圆形图片剪切方案

    @interface UIImage (Resize)
     
    //按形状切割图像
    - (UIImage*)cutImageWithRadius:(int)radius;
     
    @end
    //图片剪切
    - (UIImage*)cutImageWithRadius:(int)radius
    {
        UIGraphicsBeginImageContext(self.size);
        CGContextRef gc = UIGraphicsGetCurrentContext();
        
        float x1 = 0.;
        float y1 = 0.;
        float x2 = x1+self.size.width;
        float y2 = y1;
        float x3 = x2;
        float y3 = y1+self.size.height;
        float x4 = x1;
        float y4 = y3;
        radius = radius*2;
        
        CGContextMoveToPoint(gc, x1, y1+radius);
        CGContextAddArcToPoint(gc, x1, y1, x1+radius, y1, radius);
        CGContextAddArcToPoint(gc, x2, y2, x2, y2+radius, radius);
        CGContextAddArcToPoint(gc, x3, y3, x3-radius, y3, radius);
        CGContextAddArcToPoint(gc, x4, y4, x4, y4-radius, radius);
        
     
        CGContextClosePath(gc);
        CGContextClip(gc);
        
        CGContextTranslateCTM(gc, 0, self.size.height);
        CGContextScaleCTM(gc, 1, -1);
        CGContextDrawImage(gc, CGRectMake(0, 0, self.size.width, self.size.height), self.CGImage);
        
        
        
        UIImage *newimage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
        
        return newimage;
    }
  • 相关阅读:
    var_threshold
    一些动态绑定数据代码
    直线与圆的拟合测量
    圆的拟合__测量圆心距
    halcon骨架与xld的区分
    dyn_threshold
    模板匹配加测量Demo
    ToString 格式
    S7-200 运动控制
    环形图片识别
  • 原文地址:https://www.cnblogs.com/henusyj-1314/p/6039861.html
Copyright © 2011-2022 走看看