iOS 制作圆形图片
@implementation UIImage (Extension)
/**
* parm:sourceImage:需要剪切的原图片
* parm:borderWidth:剪切后的边框宽度
* parm:borderColor:边框颜色
*/
- (UIImage *)circleImage{
return [selfcircleImageWithImage:selfborderWidth:0borderColor:[UIColorclearColor]];
}
/**
* parm:sourceImage:需要剪切的原图片
* parm:borderWidth:剪切后的边框宽度
* parm:borderColor:边框颜色
*/
- (UIImage *)circleImageWithImage:(UIImage *)sourceImage borderWidth:(CGFloat)borderWidth borderColor:(UIColor *)borderColor{
CGFloat imageWidth = sourceImage.size.width +2 * borderWidth;
CGFloat imageHeight = sourceImage.size.height +2 * borderWidth;
UIGraphicsBeginImageContextWithOptions(CGSizeMake(imageWidth, imageHeight),NO, 0.0);
UIGraphicsGetCurrentContext();
CGFloat radius = (sourceImage.size.width < sourceImage.size.height?sourceImage.size.width:sourceImage.size.height)*0.5;
UIBezierPath *bezierPath = [UIBezierPathbezierPathWithArcCenter:CGPointMake(imageWidth *0.5, imageHeight * 0.5)radius:radius startAngle:0endAngle:M_PI *2 clockwise:YES];
bezierPath.lineWidth = borderWidth;
[borderColorsetStroke];
[bezierPathstroke];
[bezierPathaddClip];
[sourceImagedrawInRect:CGRectMake(borderWidth, borderWidth, sourceImage.size.width, sourceImage.size.height)];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
@implementation UIImageView (Extension)
- (void)setHeader:(NSString *)url
{
UIImage *placeholder = [[UIImageimageNamed:@"defaultimg"]circleImage];
self.contentMode =UIViewContentModeScaleAspectFill;
[selfsd_setImageWithURL:[NSURLURLWithString:url] placeholderImage:placeholdercompleted:^(UIImage *image,NSError *error, SDImageCacheType cacheType,NSURL *imageURL) {
self.image = image ? [imagecircleImage] : placeholder;
}];
}