业精于勤，荒于嬉;行成于思，毁于随。
Download an Apple official UIImageEffects，试试里面的+ (UIImage *)imageByApplyingDarkEffectToImage:(UIImage*)inputImage
UIImageEffects
+ (UIImage *)imageByApplyingDarkEffectToImage:(UIImage*)inputImage
Try using maskView
Queries use UIBlurEffect and UIVisualEffectView . (Requires iOS 8 and above) UIBlurEffect and UIVisualEffectView 。（前提是 iOS 8 及以上）
UIBlurEffect
UIVisualEffectView
UIBlurEffectStyle 使用 Dark
UIBlurEffectStyle
Dark
I use UIToolBar
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Download an Apple official
UIImageEffects，试试里面的+ (UIImage *)imageByApplyingDarkEffectToImage:(UIImage*)inputImageTry using maskView
Queries use
UIBlurEffectandUIVisualEffectView. (Requires iOS 8 and above)UIBlurEffectandUIVisualEffectView。（前提是 iOS 8 及以上）UIBlurEffectStyle使用DarkUIBlurEffectStyleUseDark#🎜🎜#I use UIToolBar