skwashua

+(UIImage *)blurImage:(UIImage *)image withStrength:(float)strength
{
    CIContext *context = [CIContext contextWithOptions:nil];
    CIImage *inputImage = [[CIImage alloc] initWithCGImage:image.CGImage];
    CIFilter *filter = [CIFilter filterWithName:@"CIGaussianBlur"];
    [filter setValue:inputImage forKey:@"inputImage"];
    [filter setValue:[NSNumber numberWithFloat:strength] forKey:@"inputRadius"];
    
    CIImage *result = [filter valueForKey:kCIOutputImageKey];
    float scale =  [[UIScreen mainScreen] scale];

skwashua

+(UIImage *) screenshot
{
    // Create a graphics context with the target size
    // On iOS 4 and later, use UIGraphicsBeginImageContextWithOptions to take the scale into consideration
    // On iOS prior to 4, fall back to use UIGraphicsBeginImageContext
    CGSize imageSize = [[UIScreen mainScreen] bounds].size;
    if (NULL != UIGraphicsBeginImageContextWithOptions)
        UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0.0);
    else
        UIGraphicsBeginImageContext(imageSize);

skwashua

    CGSize imageSize = [[UIApplication sharedApplication] keyWindow].bounds.size;
    UIGraphicsBeginImageContextWithOptions(imageSize, NO, [[UIScreen mainScreen] scale]);
    [[[UIApplication sharedApplication] keyWindow] drawViewHierarchyInRect:[[UIApplication sharedApplication] keyWindow].bounds afterScreenUpdates:YES];
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return viewImage;

skwashua

UIToolbar *blurringToolbar = [[UIToolbar alloc] initWithFrame:self.someView.bounds];
blurringToolbar.barStyle = UIBarStyleDefault;
blurringToolbar.translucent = YES;
blurringToolbar.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
[self.someView insertSubview:blurringToolbar atIndex:0];

skwashua

UIBezierPath *myClippingPath = ...

CAShapeLayer *mask = [CAShapeLayer layer];
mask.path = myClippingPath.CGPath;

myView.layer.mask = mask;