IOS实现弹出菜单效果MenuViewController(背景 景深 弹出菜单)

//显示  
- (void) show:(UIView*)parent  
{  
    parentView = parent;  
      
    //先隐藏backView,table  
    backView.alpha = 0;  
    _table.alpha = 0;  
      
    //移动table  
    [_table setTransform:CGAffineTransformMakeTranslation(0, _table.frame.size.height)];  
      
    //父窗口添加本view，---这个会调用viewDidLoad  
    [parentView.superview addSubview:self.view];  
      
    //添加动画，添加到父窗口中，使之从下移动上  
    [UIView animateWithDuration:0.3 animations:^{  
        //父窗口缩小  
        CGAffineTransform t = CGAffineTransformMakeScale(0.9, 0.9);  
        [parentView setTransform:t];  
          
        //显示backview,table  
        backView.alpha = 1;  
        _table.alpha = 1;  
          
        //移动table,CGAffineTransformIdentity还原原始坐标  
        [_table setTransform:CGAffineTransformIdentity];  
  
    } completion:^(BOOL finished) {  
          
    }];  
      
      
}  
//隐藏  
- (void) hide  
{  
    //添加动画，添加到父窗口中，使之从下移动上  
    [UIView animateWithDuration:0.3 animations:^{  
        //父窗口还原   
        CGAffineTransform t = CGAffineTransformIdentity;  
        [parentView setTransform:t];  
          
        //显示backview,table  
        backView.alpha = 0;  
        _table.alpha = 0;  
          
        //移动table  
        [_table setTransform:CGAffineTransformMakeTranslation(0, _table.frame.size.height)];  
          
    } completion:^(BOOL finished) {  
        [self.view removeFromSuperview];  
    }];  
}  
  
- (void)viewDidLoad  
{  
    [super viewDidLoad];  
      
    self.view.backgroundColor = [UIColor clearColor];  
      
    //背影黑罩  
    backView = [[UIView alloc]initWithFrame:self.view.bounds];  
    backView.backgroundColor = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.3];  
    [self.view addSubview:backView];  
      
    //算出table的CGRect  
    CGRect rect = self.view.bounds;  
    int height = _titleArray.count * 44;  
    rect.origin.y = rect.size.height - height;  
    rect.size.height = height;  
      
    _table = [[UITableView alloc]initWithFrame:rect];  
    _table.delegate = self;  
    _table.dataSource = self;  
    [self.view addSubview:_table];  
  
}