在寫項目時，要實現一個從下移上來的一個彈出菜單，並且背景變深的這麼一個效果，在此分享給大家。 主要說一下思路及一些核心代碼貼出來，要想下載源碼， 請到：http://download.csdn.net/download/rhljiayou/6280989 一個簡單，效果好，比較實用的菜單彈出效果的實現，效果圖：   實現方式：將self.view當前頁面縮小，在當前頁的上面添加一個菜單的view，即在self.view.superview添加。  

//顯示  
- (void) show:(UIView*)parent  
{  
    parentView = parent;  
      
    //先隱藏backView,table  
    backView.alpha = 0;  
    _table.alpha = 0;  
      
    //移動table  
    [_table setTransform:CGAffineTransformMakeTranslation(0, _table.frame.size.height)];  
      
    //父窗口添加本view，---這個會調用viewDidLoad  
    [parentView.superview addSubview:self.view];  
      
    //添加動畫，添加到父窗口中，使之從下移動上  
    [UIView animateWithDuration:0.3 animations:^{  
        //父窗口縮小  
        CGAffineTransform t = CGAffineTransformMakeScale(0.9, 0.9);  
        [parentView setTransform:t];  
          
        //顯示backview,table  
        backView.alpha = 1;  
        _table.alpha = 1;  
          
        //移動table,CGAffineTransformIdentity還原原始坐標  
        [_table setTransform:CGAffineTransformIdentity];  
  
    } completion:^(BOOL finished) {  
          
    }];  
      
      
}  
//隱藏  
- (void) hide  
{  
    //添加動畫，添加到父窗口中，使之從下移動上  
    [UIView animateWithDuration:0.3 animations:^{  
        //父窗口還原   
        CGAffineTransform t = CGAffineTransformIdentity;  
        [parentView setTransform:t];  
          
        //顯示backview,table  
        backView.alpha = 0;  
        _table.alpha = 0;  
          
        //移動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];  
  
}