实现毛玻璃效果

UIBlurEffect*blurView = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];

shareView.visualEffectView= [[UIVisualEffectView alloc] initWithEffect: blurView];

shareView.visualEffectView.frame=CGRectMake(0, [UIScreen mainScreen].bounds.size.height- containerHeight, [UIScreen mainScreen].bounds.size.width, containerHeight);

shareView.visualEffectView.alpha=0.8;

[shareView addSubview: shareView.visualEffectView];



typedefNS_ENUM(NSInteger, UIBlurEffectStyle) {

UIBlurEffectStyleExtraLight,//额外亮度，（高亮风格）

UIBlurEffectStyleLight,//亮风格

UIBlurEffectStyleDark,//暗风格

UIBlurEffectStyleExtraDark,//额外暗

UIBlurEffectStyleRegular,// 常规，适应用户界面风格

UIBlurEffectStyleProminent,// 著名的，适应用户界面风格

}NS_ENUM_AVAILABLE_IOS(8_0);