本文实例为大家分享了iOS将图片裁剪成圆形的具体代码，供大家参考，具体内容如下
原图：
圆形图片裁剪效果：
裁剪成带边框的圆形图片：
核心代码：
#import <UIKit/UIKit.h>
@interface UIImage (image)
+ (UIImage *)imageWithClipImage:(UIImage *)image;
+ (UIImage *)imageWithBorder:(CGFloat)borderW color:(UIColor *)borderColor image:(UIImage *)image;
@end
#import "UIImage+image.h"
@implementation UIImage (image)
+ (UIImage *)imageWithClipImage:(UIImage *)image{
+
//1.开启跟原始图片一样大小的上下文
UIGraphicsBeginImageContextWithOptions(image.size, NO, 0);
//2.设置一个圆形裁剪区域
//2.1绘制一个圆形
UIBezierPath *path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(0, 0, image.size.width, image.size.height)];
//2.2.把圆形的路径设置成裁剪区域
[path addClip];//超过裁剪区域以外的内容都给裁剪掉
//3.把图片绘制到上下文当中(超过裁剪区域以外的内容都给裁剪掉)
[image drawAtPoint:CGPointZero];
//4.从上下文当中取出图片
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
//5.关闭上下文
UIGraphicsEndImageContext();
return newImage;
}
+ (UIImage *)imageWithBorder:(CGFloat)borderW color:(UIColor *)borderColor image:(UIImage *)image{
//1.开启一个上下文
CGSize size = CGSizeMake(image.size.width + 2 * borderW, image.size.height + 2 * borderW);
UIGraphicsBeginImageContextWithOptions(size, NO, 0);
//2.绘制大圆,显示出来
UIBezierPath *path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(0, 0, size.width, size.height)];
[borderColor set];
[path fill];
//3.绘制一个小圆,把小圆设置成裁剪区域
UIBezierPath *clipPath = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(borderW, borderW, image.size.width, image.size.height)];
[clipPath addClip];
//4.把图片绘制到上下文当中
[image drawAtPoint:CGPointMake(borderW, borderW)];
//5.从上下文当中取出图片
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
//6.关闭上下文
UIGraphicsEndImageContext();
return newImage;
}以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程网。
