iOS8以后毛玻璃效果

1.实例化两个属性

- (UIBlurEffect *)effect
{
    if (!_effect) {
        _effect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
    }
    return _effect;
}
- (UIVisualEffectView *)effectView
{
    if (!_effectView) {
        _effectView = [[UIVisualEffectView alloc] initWithEffect:self.effect];
        _effectView.frame = CGRectMake(0, 0, self.bgImageView.width, self.bgImageView.height);
    }
    return _effectView;
}

2. bgImageView设置图片, 并把毛玻璃效果添加到需要显示的控件上

    [self.bgImageView sd_setImageWithURL:[NSURL URLWithString:imgUrl]];
    [self.bgImageView addSubview:self.effectView];

3. 这样就可以了(仅限iOS8以后的版本)