iOS图片设置圆角

+ (UIImage *)imageWitCornerRadius:(float)cornerRadius image:(UIImage *)original
{
    CGRect frame = CGRectMake(0, 0, original.size.width, original.size.height);
    UIGraphicsBeginImageContextWithOptions(original.size, NO, 1.0);
    
    [[UIBezierPath bezierPathWithRoundedRect:frame cornerRadius:cornerRadius] addClip];
    [original drawInRect:frame];
    
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return image;
}

//图片压缩

+ (UIImage *)scaleToSize:(UIImage *)img size:(CGSize)size{
    UIGraphicsBeginImageContext(size);
    [img drawInRect:CGRectMake(0, 0, size.width, size.height)];
    UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return scaledImage;
}