UIKit Blur Detection

CKBlurDetection.h

//
//  CKBlurDetection.h
//
//  Created by Conrad Kramer on 1/23/14.
//  Copyright (c) 2014 Kramer Software Productions, LLC. All rights reserved.
//

extern BOOL CKBlurEnabled();

CKBlurDetection.m

//
//  CKBlurDetection.m
//
//  Created by Conrad Kramer on 1/23/14.
//  Copyright (c) 2014 Kramer Software Productions, LLC. All rights reserved.
//

static NSArray * CKGetFilters(UIView *view) {
    NSMutableArray *filters = [NSMutableArray arrayWithArray:view.layer.filters];
    for (UIView *subview in view.subviews) {
        [filters addObjectsFromArray:CKGetFilters(subview)];
    }
    return [filters copy];
}

BOOL CKBlurEnabled() {
    UIToolbar *toolbar = [[UIToolbar alloc] init];
    [toolbar setNeedsLayout];
    [toolbar layoutIfNeeded];
    return [[CKGetFilters(toolbar) valueForKey:@"name"] containsObject:@"gaussianBlur"];
}