UIBlurEffect * blur = [UIBlurEffect effectWithStyle:UIBlurEffectStyleDark];
UIVisualEffectView * effe = [[UIVisualEffectView alloc]initWithEffect:blur];
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UIBlurEffect * blur = [UIBlurEffect effectWithStyle:UIBlurEffectStyleDark];
UIVisualEffectView * effe = [[UIVisualEffectView alloc]initWithEffect:blur];
http://www.ithao123.cn/content-8310026.html