I have encountered a problem. The app needs to achieve the effect show in the following figure; Blur with a nested blur. Please provide some advice, thank you very much.
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http://stackoverflow.com/questions/17041669/creating-a-blurring-overlay-view try this. – Narendra Pandey Nov 09 '16 at 09:37
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Use UIVisualEffectView to implement this. – Balaji Malliswamy Nov 09 '16 at 10:12