iOS裁切图片(圆头像的实现)

#####裁切图片(圆头像的实现) #####1.仍是那几个步骤

#####2.步骤详细在代码里

- (void)viewDidLoad {
    [super viewDidLoad];
    //加载图片
    UIImage *image=[UIImage imageNamed:@"阿狸头像"];
    //开启图片上下文
    UIGraphicsBeginImageContextWithOptions(image.size, NO, 0);
    //裁切
    //裁切范围
    //如下两种方法均可以
    UIBezierPath *path=[UIBezierPath bezierPathWithArcCenter:CGPointMake(image.size.width*0.5, image.size.height*0.5) radius:image.size.width*0.5 startAngle:0 endAngle:M_PI*2 clockwise:YES];
//    UIBezierPath *path=[UIBezierPath bezierPathWithOvalInRect:CGRectMake(0, 0, image.size.width, image.size.height)];
    [path addClip];
    //[path fill];
    //绘制图片
    [image drawAtPoint:CGPointZero];
    //从上下文中得到裁切好的图片
    UIImage *image1=UIGraphicsGetImageFromCurrentImageContext();
    //关闭图片上下文
    UIGraphicsEndImageContext();
    //显示
    self.imageView.image=image1;
}

#####3.效果图片

• 1.

#####4.源代码的地址

• github
• http://git.oschina.net/HYLAppleDream/Quartz2D/blob/master/图片裁剪(圆头像图片)的实现/图片裁剪(圆头像图片)的实现/ViewController.m?dir=0&filepath=图片裁剪%28圆头像图片%29的实现%2F图片裁剪%28圆头像图片%29的实现%2FViewController.m&oid=32b651901d42093393ae67f9f3f42ed03f996c38&sha=37967f5f6bd0676c53142d1152ea6e03725e8259