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| // | ||
| // CKBlurView.h | ||
| // CKBlurView | ||
| // | ||
| // Created by Conrad Kramer on 10/25/13. | ||
| // Copyright (c) 2013 Kramer Software Productions, LLC. All rights reserved. | ||
| // | ||
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| #import <UIKit/UIKit.h> | ||
| #import <QuartzCore/QuartzCore.h> | ||
| #import <CoreGraphics/CoreGraphics.h> | ||
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| extern NSString * const CKBlurViewQualityDefault; | ||
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| extern NSString * const CKBlurViewQualityLow; | ||
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| NS_CLASS_AVAILABLE_IOS(7_0) @interface CKBlurView : UIView | ||
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| /** | ||
| Quality of the blur. The lower the quality, the more performant the blur. Must be one of `CKBlurViewQualityDefault` or `CKBlurViewQualityLow`. Defaults to `CKBlurViewQualityDefault`. | ||
| */ | ||
| @property (nonatomic, retain) NSString *blurQuality; | ||
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| /** | ||
| Radius of the Gaussian blur. Defaults to 5.0. | ||
| */ | ||
| @property (nonatomic, readwrite) CGFloat blurRadius; | ||
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| /** | ||
| Bounds to be blurred, in the receiver's coordinate system. Defaults to CGRectNull. | ||
| */ | ||
| @property (nonatomic, readwrite) CGRect blurCroppingRect; | ||
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| /** | ||
| Boolean indicating whether the edge of the view should be softened. Defaults to YES. | ||
| */ | ||
| @property (nonatomic, readwrite) BOOL blurEdges; | ||
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| @end |
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| // | ||
| // CKBlurView.m | ||
| // CKBlurView | ||
| // | ||
| // Created by Conrad Kramer on 10/25/13. | ||
| // Copyright (c) 2013 Kramer Software Productions, LLC. All rights reserved. | ||
| // | ||
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| #import "CKBlurView.h" | ||
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| @interface CABackdropLayer : CALayer | ||
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| @end | ||
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| @interface CAFilter : NSObject | ||
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| + (instancetype)filterWithName:(NSString *)name; | ||
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| @end | ||
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| @interface CKBlurView () | ||
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| @property (retain, nonatomic) CAFilter *blurFilter; | ||
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| @end | ||
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| extern NSString * const kCAFilterGaussianBlur; | ||
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| NSString * const CKBlurViewQualityDefault = @"default"; | ||
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| NSString * const CKBlurViewQualityLow = @"low"; | ||
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| static NSString * const CKBlurViewQualityKey = @"inputQuality"; | ||
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| static NSString * const CKBlurViewRadiusKey = @"inputRadius"; | ||
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| static NSString * const CKBlurViewBoundsKey = @"inputBounds"; | ||
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| static NSString * const CKBlurViewHardEdgesKey = @"inputHardEdges"; | ||
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| @implementation CKBlurView | ||
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| + (Class)layerClass { | ||
| return [CABackdropLayer class]; | ||
| } | ||
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| - (instancetype)initWithFrame:(CGRect)frame { | ||
| self = [super initWithFrame:frame]; | ||
| if (self) { | ||
| CAFilter *filter = [CAFilter filterWithName:kCAFilterGaussianBlur]; | ||
| self.layer.filters = @[ filter ]; | ||
| self.blurFilter = filter; | ||
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| self.blurQuality = CKBlurViewQualityDefault; | ||
| self.blurRadius = 5.0f; | ||
| } | ||
| return self; | ||
| } | ||
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| - (void)setQuality:(NSString *)quality { | ||
| [self.blurFilter setValue:quality forKey:CKBlurViewQualityKey]; | ||
| } | ||
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| - (NSString *)quality { | ||
| return [self.blurFilter valueForKey:CKBlurViewQualityKey]; | ||
| } | ||
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| - (void)setBlurRadius:(CGFloat)radius { | ||
| [self.blurFilter setValue:@(radius) forKey:CKBlurViewRadiusKey]; | ||
| } | ||
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| - (CGFloat)blurRadius { | ||
| return [[self.blurFilter valueForKey:CKBlurViewRadiusKey] floatValue]; | ||
| } | ||
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| - (void)setBlurCroppingRect:(CGRect)croppingRect { | ||
| [self.blurFilter setValue:[NSValue valueWithCGRect:croppingRect] forKey:CKBlurViewBoundsKey]; | ||
| } | ||
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| - (CGRect)blurCroppingRect { | ||
| NSValue *value = [self.blurFilter valueForKey:CKBlurViewBoundsKey]; | ||
| return value ? [value CGRectValue] : CGRectNull; | ||
| } | ||
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| - (void)setBlurEdges:(BOOL)blurEdges { | ||
| [self.blurFilter setValue:@(!blurEdges) forKey:CKBlurViewHardEdgesKey]; | ||
| } | ||
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| - (BOOL)blurEdges { | ||
| return ![[self.blurFilter valueForKey:CKBlurViewHardEdgesKey] boolValue]; | ||
| } | ||
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| @end |
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