贝塞尔曲线画圆角

UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,100,100)]; 

imageView.center =CGPointMake(200,300); 

UIImage *anotherImage = [UIImage imageNamed:@"image"]; 

UIGraphicsBeginImageContextWithOptions(imageView.bounds.size, NO, 1.0); 

[[UIBezierPath bezierPathWithRoundedRect:imageView.bounds

                           cornerRadius:50] addClip];

[anotherImage drawInRect:imageView.bounds];

imageView.image =UIGraphicsGetImageFromCurrentImageContext(); 

UIGraphicsEndImageContext(); 

[self.view addSubview:imageView];