66 lines
1.6 KiB
Mathematica
66 lines
1.6 KiB
Mathematica
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//
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// We subclass UIBlurEffect so that we can set the BlurAmount.
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// See: http://stackoverflow.com/a/30744777/304706
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//
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#import "BlurEffectWithAmount.h"
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#import <objc/runtime.h>
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@interface UIBlurEffect (Protected)
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@property (nonatomic, readonly) id effectSettings;
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@end
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@implementation BlurEffectWithAmount
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@dynamic blurAmount;
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+ (instancetype)effectWithStyle:(UIBlurEffectStyle)style
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{
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id instance = [super effectWithStyle:style];
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object_setClass(instance, self);
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return instance;
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}
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+ (instancetype)effectWithStyle:(UIBlurEffectStyle)style andBlurAmount:(NSNumber*)blurAmount
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{
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BlurEffectWithAmount *effect = (BlurEffectWithAmount*)[self effectWithStyle:style];
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effect.blurAmount = blurAmount;
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return effect;
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}
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- (void)setBlurAmount:(NSNumber*)blurAmount {
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objc_setAssociatedObject(self,
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@selector(blurAmount),
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blurAmount,
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OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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- (NSNumber*)blurAmount {
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return objc_getAssociatedObject(self, @selector(blurAmount));
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}
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- (id)effectSettings
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{
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id settings = [super effectSettings];
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NSNumber *blurAmount = self.blurAmount;
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if (blurAmount) {
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[settings setValue:blurAmount forKey:@"blurRadius"];
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}
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return settings;
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}
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- (id)copyWithZone:(NSZone*)zone
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{
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id instance = [super copyWithZone:zone];
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object_setClass(instance, [self class]);
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// Must also copy blur amount to new instance
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objc_setAssociatedObject(instance,
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@selector(blurAmount),
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self.blurAmount,
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OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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return instance;
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}
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@end
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